(
;
GaMe[1]
SiZe[ 19 ]
goWriteVersion[1.4o,Unregistered version]
goWriteeXtension[DefPic=001]
GameName[ Instruction ]
DaTe[ Game by ]
PlayerBlack[ Yilun Yang]
PlayerWhite[ and the ]
HAndicap[ American]
REsult[ Go Assoc. Association]
Comment[ Welcome to this game. Please begin by clicking on the fifth icon from the top on
the right side in the tool window to the far left \(The topmost icon with an arrow
pointing at '1' and '3.'\)]
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Black[qd]
Comment[Please extend this comment window to its maximum proportions by holding down on
the mouse button and dragging the bottom line down to the bottom of the screen.


Black 1 is on a `3-4' point. This is the most common opening move because it has several
good follow-up moves. \(Lines are counted inward from the nearest edges. This includes
the edge-of-the-board line.\)   

Click again on the same icon and see if you can guess the next move. Then click again for
the next move to appear. Refer to the help section for other features.

To remove the annoying stone at the end of the pointer, click on the arrow in the upper
left corner of the tool box menu.]
;
White[cc]
Comment[W2 The 3-3 point move in an empty corner like this is good for territory. One move
makes a very secure situation for White.

Note: Although this tight-in-the-corner move makes the corner hard for Black to attack,
it has weak \"outward influence\" but it is good for territory. One move makes a very
secure situation for White.

Use the down-arrow key on your computer to keep reading the text if it goes past the end
of this window.   

\"Influence\" is the impact which a stone may have on near-by board points. This is
generated by strongly cooperating stones. Such stones may participate in enclosing future
territory but they are primarily useful in limiting the opponent's options for good moves
in the near-by area.]
;
Mark[qd]
Letter[dp]
Black[pq]
Comment[B3 This move cooperates nicely with B1. Black could also have played in the corner 
area marked 'A.' Usually, but not always, the corners are played in first.   

HELPFUL INSTRUCTIONS FOR USING THIS PROGRAM:   

You can get rid of the annoying stone at the end of the pointer by moving it to the arrow 
icon in the upper left corner of the tool window and clicking. Now you can experiment by 
using the pointer to try different moves than are in the game record. Simply point and 
click.YOU MUST DELETE THESE MOVES BEFORE CONTINUING BY CLICKING ON THE ICON WITH THE 
'BLACK STONE AND AN ARROW POINTING AT A GARBAGE CAN' \(OR USING THE 'DELETE MOVE' COMMAND 
FROM THE EDIT MENU. IF YOU MAKE A MISTAKE, CLOSE THE GAME \(DO NOT SAVE IT!\) AND REOPEN 
IT. IF YOU MAKE A PERMANENT MISTAKE, ALL GAMES ARE BACKED UP IN THIS FILE--E.G. '19X19No1' 
and 'a19X19-1.'   

YOU CAN REMOVE MISTAKEN LETTERS AND SYMBOLS BY USING THE POINTER IN 'ARROW MODE' \(I.E. 
BY CLICKING ON THE ARROW IN THE UPPER LEFT OF THE TOOL MENU\) TO CIRCLE THE MISTAKE AND 
USING THE TRASHCAN ICON. YOU CANNOT REMOVE MISTAKES BY MOVING THE 'BACK ONE MOVE' ICON!]
goWriteeXtension[Marks=M003L]
;
Letter[qo]
[pl]
Mark[qd]
White[dq]
Comment[W4 The last corner. Each corner move is placed where it can easily make a 
\"base\" when attacked on one side, by moving out to the other side. At this stage, it is 
more attractive than approaching at 'A, because Black could have`squeezed' White `A' by 
playing at `B' which would also be an extension from the marked Black stone above. This 
would leave very little room between `B' and the marked Black stone for White to form a 
`base' in that area.]
goWriteeXtension[Marks=LLM003]
;
Mark[qd]
Black[oc]
Comment[B5 This `knights move' from the marked Black corner stone makes an ideal shape 
in the corner. Now this corner formation can make two eyes easily, but more important is 
it's `influence.' ]
goWriteeXtension[Marks=M003]
;
Letter[dj]
[jp]
[po]
[qk]
White[qo]
Comment[W6. This approach move is one way to play. The areas around 'A' and 'B' were some 
of the other possibilities. W6 is more of a fighting move, 'A' and 'B' would have set up 
opposing areas of influence for the players. It was played low, on the 3rd line, so White 
can now create a base along the right side \(at 'D' for example\) whenever that might 
seem appropriate. This `low move', as opposed to `C', leaves the corner open to an 
attack by White. ]
goWriteeXtension[Marks=LLLL]
;
Mark[oc]
[qd]
Black[pk]
Comment[B7 'Squeezes' White's single stone below. Note: B7 cooperates nicely with the two 
marked Black stones above. This restricts any White attempt to make a base on the right 
side between B7 and the two marked Black stones. ]
goWriteeXtension[Marks=M003M003]
;
Letter[oq]
Mark[pq]
White[pp]
Comment[W8 This is the best approach to building a White base in the lower 
right corner. It is a \"sente\" move, meaning Black must respond because it took a 
liberty away from the lone marked Black stone. Black must answer because otherwise 
White could easily grab the whole lower right corner by playing at `A'. Thus, White 
keeps the initiative and can choose the next move. ]
goWriteeXtension[Marks=LM003]
;
Mark[pq]
Black[oq]
Comment[B9 Black saves his threatened stone by 'crawling' along the second line. This is 
a \"gote' move, meaning that Black is not forcing White to respond. However, he \(or 
she--it is unknown who played this game\) can now safely create a base along the bottom. ]
goWriteeXtension[Marks=M003]
;
Mark[pp]
White[qq]
Comment[W10 This was a key point for both players. Whoever got there first gets a 
secure \"base\" in the corner. White was able to get this move in ahead of Black 
because of the forcing move of the marked stone.]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000005]
;
Letter[rp]
[rq]
Mark[qq]
Black[qr]
Comment[B11 A Key move as Black still needs a base. Black gets back part of the corner 
and aims to form a base along the bottom edge of the board. This Black move is sente 
because it threatens to attack the triangled White stone at `A' or `B'. That would give 
White 'bad shape' and make it very hard for White to make a base here.]
goWriteeXtension[Marks=LLM003]
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FG[]
goWriteeXtension[Picture=aass000011]
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White[rq]
Comment[W12 The only proper move. It assures eye space for White in the lower right. 
Otherwise Black could seriously squeeze out White's important corner base by playing at 
W12 next. It is also sente because . . . ]
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FG[]
goWriteeXtension[Picture=aass000012]
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Black[lq]
Comment[B13 . . . it is necessary for Black to assure a base along the bottom. Given the 
chance, a White squeeze move at this B13 point before Black played there would have been 
devastating to Black. Each player must always be alert to the threat of such a squeeze 
move early in the game.]
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FG[]
goWriteeXtension[Picture=aass000013]
;
Mark[oc]
[rq]
White[co]
Comment[W14 This is a big move. It is comparable to the triangle-marked Black move in the 
upper right. Keeping sente with the marked White move in the lower right encounter made 
this play possible.]
goWriteeXtension[Marks=M003M002]
;
FG[]
goWriteeXtension[Picture=aass000014]
;
Letter[fc]
Mark[oc]
[qd]
Letter[ec]
[df]
Black[fd]
Comment[B15 A common approach to a single opposing stone at the 3-3 point. \(B15 at   

`A' or `B' would be equally effective here.\) On the other hand, while playing B15 at 
`C' right now would be very effective in disrupting potential White territory along the 
left side, Black's potential along the top is worth more because B15 cooperates well 
with the upper right marked stones]
goWriteeXtension[Marks=LM003M003LL]
;
FG[]
goWriteeXtension[Picture=aass000015]
;
Mark[co]
[dq]
White[df]
Comment[W16 White must now move out away from the corner to assure a base. W16 cooperates 
nicely with the two marked White stones below. If Black had gotten to the W16 point before 
White, he or she could have squeezed White into a very small corner area, and thus reduce 
White's potential territory along the left side.]
goWriteeXtension[Marks=M003M003]
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FG[]
goWriteeXtension[Picture=aass000016]
;
Mark[oc]
[qd]
Black[id]
Comment[B17 An ideal two space extension from the previous Black move and the \"five 
line space\" from the two marked corner stones is perfect. White's options for future 
invasion along the top side already appear to be severely restricted.]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000017]
;
Letter[oi]
White[qi]
Comment[W18 This move makes a good start at eliminating Black's potential along 
the right side. This move is sente. It obliges Black to answer because it threatens the 
solitary Black stone. If Black were to play elsewhere now and White played at 'A,' Black 
would be in real trouble because there would be almost no room to make a base along the 
right side.]
goWriteeXtension[Marks=L]
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FG[]
goWriteeXtension[Picture=aass000018]
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Letter[dj]
Black[qg]
Comment[B19 This is a valuable move. It squeezes the White stone and greatly improves 
Black's upper right influence. White could now abandon that stone and play at 'A' 
instead \(and wait for opportunities to develop later on the right side of the board\). 
This would tend to equalize the opposite sides of the board. but it is a matter of 'style' 
or 'feeling,' It is impossible to divine the ultimate outcome!]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000019]
;
White[op]
Comment[W20 This is good timing. White's right side group has been in need of help. 
White is now much more secure. W20 removes a liberty from the two marked Black stones. 
This is sente.      

Note: Black's corner group is threatened now, not with death, but with 'living small' 
and losing any outward influence. To see why click on the Window menu and open up 
'Variations Window.' Click on 'Variation 1.' Continue by clicking the Next Move icon.]
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FG[]
goWriteeXtension[Picture=aass000000]
;
(
Comment[Click on the Next Move icon to continue the game.]
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Black[np]
Comment[B21 This is necessary because Black's lower right group would be vulnerable 
otherwise.   

Note: Black's move on the 4th line has the advantage of restraining White's thrust 
toward the center. \(i.e: It gives Black more upward influence.\)]
;
FG[]
goWriteeXtension[Picture=aass000021]
;
Letter[nq]
White[no]
Comment[W22 This is a forcing move. Black is vulnerable to attack at `A'.   

Note: This is a `leaning' attack. It reduces the   

B21 liberties. If Black were to play elsewhere now a White move at \"A\"   

could destroy Black's whole corner. So Black must respond.   

   

*Leaning*: Making contact with an opponent's stone in a way that obliges the opponent 
to answer, and/or which keeps him from extending in an unwanted way.]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000022]
;
Black[mp]
Comment[B23 Necessary because of cutting point problems if B21 were left undefended.   

Note: Black 21 was short of liberties and vulnerable. Now Black has strengthened his 
base and his outward influence considerably with this single move. \(The attack point 
shown shown in the previous screen is no longer effective.\)]
;
FG[]
goWriteeXtension[Picture=aass000023]
;
White[oi]
Comment[W24 An important move which squeezes and attacks the lone Black stone and saves 
the single White stone by extending toward the center.]
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FG[]
goWriteeXtension[Picture=aass000024]
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Black[nl]
Comment[B25 Black now must move out toward the center. He or she cannot make a base on 
the right.

Note: If White now plays correctly there will not be enough space along the right side 
for Black to make even one eye there.]
;
FG[]
goWriteeXtension[Picture=aass000025]
;
White[nj]
Comment[W26 A natural squeeze. It also helps with the defense of the two White stones. 
This move also puts pressure on the two Black stones by taking a point which would have 
been very useful for them. ]
;
Letter[oo]
Black[pn]
goWriteeXtension[Marks=L]
;
Black[pn]
;
FG[]
goWriteeXtension[Picture=aass028027]
;
Letter[oo]
[on]
White[qn]
Comment[W28 White protects the cutting point and gets more eye space along the right 
side at the same time. Now White can make two eyes along the right side, regardless of 
the unsettled eye space in the corner. Black must find some other way to strengthen his 
nearly surrounded three stones. Because of W28 a Black stone at A could be captured 
immediately. Look at the Variation 2 in the Variation window which is in the Window 
menu. It will require some extra clicking. ]
goWriteeXtension[Marks=LL]
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FG[]
goWriteeXtension[Picture=aass000000]
;
(
;
FG[]
goWriteeXtension[Picture=aass000028]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[oo]
Mark[nj]
[oi]
[qi]
Black[pm]
Comment[B29 This helps the Black group by increasing Black's liberties and makes the cut 
at 'A' an effective threat again.  

Note: This move also prevents what could have been a painful cut by White at the B29 
point. Now if White plays at 'A' or at the point above 'A' to defend against the cut, 
White can keep the two Black groups separated, but it would allow Black to then attack 
the three marked White stones.]
goWriteeXtension[Marks=LM003M003M003]
;
FG[]
goWriteeXtension[Picture=aass000029]
;
Letter[qk]
[oo]
White[ql]
Comment[W30 This is a defensive move. White hopes to connect his upper group with the one 
below. It forces Black to make a choice.  If Black plays at 'A.' to prevent White from 
joining up the two groups White can prevent the cut by playing at 'B.' This way, Black 
would not have two eyes and be vulnurable to attack by the two White groups. However, 
Black could continue to attack the upper three White stones. 

On the other hand, Black can cut at 'B' and virtually connect with the safe Black group on 
the bottom. This would give Black a certain amount of influence on the lower side, while 
White would have made some profit on the right side of the board.]
goWriteeXtension[Marks=LL]
;
FG[]
goWriteeXtension[Picture=aass000030]
;
Black[oo]
Comment[B31 Black makes the safe choice and cuts.]
;
FG[]
goWriteeXtension[Picture=aass000031]
;
White[rk]
Comment[W32 White responds by making a solid connection between the upper and lower 
groups. This engagement has turned out well for White, but Black is even better off 
since he or she now has strong center influence.]
;
FG[]
goWriteeXtension[Picture=aass000032]
;
Letter[cd]
[ce]
[di]
Black[ch]
Comment[B33 This is the biggest move on the board right now because the left side is wide 
open and White's formation is not strong yet. B33 squeezes the White corner group and is 
sente because Black can attack around 'A' or 'B' and destroy White's shape or make him or 
her live 'small' in the corner. Black thus has time to establish a left side base.    

  

B33 is also preempting a potential White move at or near `C'. That would have greatly hampered Black's options along the left side.]
goWriteeXtension[Marks=LLL]
;
FG[]
goWriteeXtension[Picture=aass000033]
;
Mark[fd]
[id]
White[cf]
Comment[W34 This move makes a complete base for White in the upper left corner and is necessary now. Without B34 White would be vulnerable in the corner because of the near-by marked Black stones. This move also attacks B33 so it is sente.]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000034]
;
Letter[cj]
Black[ck]
Comment[B35 This move makes a base for Black, and it is necessary. Black now has a beginning for eye space along the left side. Without B35, a White stone at 'A' would have been a big gain    

for White and a severe attack on Black.   

]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000035]
;
Letter[hq]
White[gq]
Comment[W36 This appears to be a slow move but in fact it is the right move for White now because Black's lower right group is already strong. Extending any further, say at `A' or beyond, would have invited a Black invasion supported by his lower right strength. A preemptive Black move at `A', would have been a very severe set-back for   

White.   

]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000036]
;
Mark[gq]
Black[ld]
Comment[B37 This might seem to be a 'slow' move which defends only territory but it is the biggest move on the board now. Its proximity to the upper right group makes the potential for Black territory along the top VERY substantial. Moves #36 \(the White triangled stone\) and #37 are `miai' \(pronounced `me-eye'\). This is a situation in which two   

open moves are equal in value. When one is taken, the opponent will usually   

take the other.]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000037]
;
Mark[ck]
[ch]
White[cm]
Comment[W38 This also seems like a slow move but it squeezes Black's marked group on the left side and it strengthens White in the lower left corner.   

]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000038]
;
Black[iq]
Comment[B39 This is the last big move on the board now. It ends the \"Fuseki\"   

\('foo-sek-ee'\). *Fuseki* is the opening phase of a game of Go.]
;
FG[]
goWriteeXtension[Picture=aass000039]
;
Mark[no]
White[mm]
Comment[W40 This is called a \"reduction move.\" If White could keep his triangled cutting stone alive the separated Black group would be in great trouble. Since he cannot do this, \(at least not right now\) he or she hopes to use W40 to confine Black's potential here. Hence the term `reduction.'   

]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000040]
;
Black[ml]
Comment[B41 separates the two White stones from the White group above,   

and it also is a big help to the Black group it is a part of. The two White stones are in trouble. If White now tries to save these two marked stones and Black responds properly, the two White stones will be captured and Black will end up being immensely stronger in the center. ]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[mm]
[no]
White[km]
Comment[W42 White makes a light `running' move toward the center. *Running*: A loose move usually aimed at helping a threatened group to reach toward the center where there is far less danger of capture.   

White hopes W42 may prove threatening to Black   

\(because the two triangled stones can still connect up and separate the Black groups\) and that this would help White keep Black out of the center. At the moment, however, White's two marked stones remain quite vulnerable.]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[ll]
Comment[B43 A key point. It strengthens Black and weakens White.   

White needed to be on this point before Black. White is being squeezed. ]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[iq]
[gq]
[km]
[mm]
[no]
White[ip]
Comment[W44 The best play for White now. White is `leaning' on the triangled Black stone and aiming at connecting the two squared stones \(and sacrificing the . two circled stones.\)   

]
goWriteeXtension[Marks=M003M002M002M001M001]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[no]
[iq]
Black[jp]
Comment[B45 This is the natural Black response. It helps the squared Black stone,   

which was weak. Note that now White 44 is weak. It has only two liberties, whereas the two Black stones it touches each have three. Also, Black is still making sure that White does not find a way to rescue the vital triangled White cutting stone.]
goWriteeXtension[Marks=M003M002]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[hp]
Mark[km]
White[io]
Comment[W46 This move, or at 'A', \(which equally increases White's liberties\) are the natural defensive moves for White, but W46 is best because it reaches toward the marked White stone above. It also continues to enclose territory to the left.]
goWriteeXtension[Marks=LM003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[gq]
Black[hq]
Comment[B47 A good forcing move which takes a liberty away from the single marked White stone, and increases the liberties of the Black twosome. B47 is 'double sente' for Black, meaning that it would have been sente for White to move there since Black would have to defend. B47 starts a painful invasion into what had appeared to be White's territiory. Whatever White does, Black will still have sente so he or she will continue reducing White's potential territory in the lower left.   

]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[gp]
Comment[W48 This is the only move for White now. This move adds liberties to the marked White stone and also restrains Black   

from pushing further into White's potential lower left territory .]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[km]
[mm]
[no]
Black[jo]
Comment[B49 A double forcing move by Black. It takes away one White liberty and threatens to push on into the center, cutting off the three marked white stones. White must respond just as Black would have had to if White had gotten there first.]
goWriteeXtension[Marks=M003M003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[km]
Letter[nn]
Mark[ll]
[ml]
[nl]
[pk]
[pm]
[pn]
[oo]
White[jn]
Comment[W50 The only proper response to B49. This move is sente and helps assure a connection with the marked White stone above and blocks the Black thrust toward the center. It is sente because if Black were to play elsewhere now White could play at `A' and thus seperate the eyeless marked Black group from the strong lower Black group.   

]
goWriteeXtension[Marks=M003LM002M002M002M002M002M002M002]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[no]
Black[mo]
Comment[B51 Now Black can connect his upper group to the lower Black group no matter what happens. If White tries to escape with the triangulated stone by playing 'A,' Black can play 'B' or 'C.' This is a gote move but it is worth it now. Black will now be free to push into the center from the upper Black group with no need to worry about making eyes.   

  

To see this in action, bring down the Variation window from the Window menu and click on 'Variation 3.'   

]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000026]
;
(
;
Mark[cf]
[df]
White[el]
Comment[W52 This move develops the center area and also squeezes the left side   

Black group.The White triangulated two stone `post', combined with W52, will make it difficult for Black to build a secure base.   

]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[bg]
Comment[B53 Black makes a defensive move to increase potential eye space here. This Black formation still has a weakness and so Black can not be sure about the necessary two eyes here. Because of this White will continue to squeeze Black. White aims to strengthen his or her structure in the process and thus to increase potential terrotory in the center.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[bf]
Comment[W54 White takes a key point away from Black and strengthens White's   

corner formation. This move is sente because Black's base does not yet have secure eye space. ]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[eh]
Comment[B55 Helps confine White's upper-left corner group and reaches out toward the center. White has loosely enclosed a very large potential territory in the lower left quadrant. Black aims to reduce this as much as possible. However, if Black can not make another eye in the center Black must make sure of two eyes within the rather loose left side base.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[ff]
Comment[W56 Separates the two Black groups. White is also aiming to improve his opportunities to reduce Black's potentially large territory in the top center of the board.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[cb]
Black[dc]
Comment[B57 This is a clever forcing move. It attaches to a strong White shape   

in a way that is sente. All this fighting is very close to the wire. If Black were able to play at 'A' now White would be in serious trouble because White would have only enough space for one eye.]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[cc]
White[dd]
Comment[W58 White must protect the corner and this is a proper answer since   

White's marked stone, was weak. White must remain secure in the corner but also it is urgent that he or she find a way to reduce Black's large potential territory along the top.]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[ec]
Black[cb]
Comment[B59 This is a special situation. Black moves to squeeze White in the   

corner. But Black still must aim to block White pene- tration into Black's   

loose framework at the top. Normally Black would play at `A' to solidly defend Black's upper side enclosure, but there are large gains to be won and Black is gambling on corrrectly reading out the result of this complicated situation. ]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[db]
White[ec]
Comment[W60 This is the only move that can separate the two Black stones in the upper left corner from the large   

Black group at the top. This White move is therefore Sente because Black must answer or lose the whole corner if White takes at 'A.' ]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[db]
Comment[B61 Black connects and obtains four liberties for the three stone group. ]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[ed]
Comment[W62 White connects and   

is prepared to give up the corner to Black in exchange for penetration into Black's large territory at the top-center. ]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[cd]
Black[eb]
Comment[B63 The natural move, since Blacks three stones needed more eye space. Black can make two eyes in the corner at any time as long as White leaves the cutting point at `A' open.]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[fc]
Comment[W64 White continues to push into Black's open formation at the top. This thrust threatens to keep the two Black groups at the top separated, and thus helps to reduce Black's potential    

territory.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[cc]
Letter[bc]
[bd]
Black[cd]
Comment[B65 Atari. Black can now capture the marked White stone and make two eyes   

in the upper left corner whenever he or she wishes. The marked White stone cannot be saved by playing at 'A' because Black would    

play at 'B.' This would leave White with only two liberties while Black has three.]
goWriteeXtension[Marks=M003LL]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[pc]
Comment[W66 This interesting move is a \"probe\" by White and asks Black to commit him or herself to playing one way or the other. White will then try to bend the situation in his or her's favor. It is a sente move so Black must answer because there is a threat to make life in the corner. As long as White can find sente moves here there is no risk that Black will go back and stop White's push into Black's potential territory at the top.   

]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[pb]
Comment[B67 This is the correct answer. Black needs to protect the corner area   

even more than to stop White's push into the top center area. White does not need to respond to this move since the only purpose of W66 was to ask for a response \(which White can take advantage of now or later\).    

  

This stone can be abandoned when Black responds--even if this becomes Black's territory, it has not cost White anything because Black filled up his or her own territory to defend. However, a probe move must always be sente. If White misreads the situation and Black does not respond, White has not only lost sente but also loses a point while allowing Black to build a stronger framework..   

]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[ob]
Comment[W68 Another `asking' move or `probe. White makes things more complicated and thereby hopes to create opportunities to reduce this large Black corner area.   

]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[qb]
Black[nb]
Comment[B69 This is the proper answer. Black takes away one White liberty and   

puts White in atari. If Black were to ignore W68 White could play at 'A' and capture the marked stone, thus having a good chance to make life in the corner.]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[dj]
Comment[W70 This is an attack move which threatens Black's eye space and hence requires a Black response. This Black group is squeezed from both sides and White is also threatening to invade   

Black's eye-space.   

Since Black cannot be sure of a second eye in the center, Black must now   

make this group into a viable two-eye structure.   

]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[cj]
Comment[B71 Assures connection with the Black stones above and it improves the   

prospect of creating two eyes along the left side.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[di]
Comment[W72 White takes the key point of Black's eye shape. Note: Black would love to have gotten to this   

point before White. That would have solved his or her's weakness. As things   

stand, if White attacks before Black defends, White can squeeze Black's base down to only one eye.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[dh]
Comment[B73 A \"must\" move. It assures that Blacks' stones will stay connected and be able to push on into the center. Otherwise White would have cut at this point to secure a large center area and threaten to kill Black's left side group.   

]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[fi]
Comment[W74 Cooperates with 70 and 72. White is aiming to secure a large area   

in the lower left center.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[fi]
Black[fh]
Comment[B75 Black keeps pushing into the center with sente moves. B75 is sente because W74 \(the triangled stone\) has been weakened by the contact of B75.]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[fi]
Letter[ei]
[gh]
White[gi]
Comment[W76 A natural move. It adds liberties to the trianguled stone and protects against a Black cut at `A'. This move also strengthens White's overall shape and improves the prospects for enclosing sizeable center territory   

below because a White play at 'B' would cut off Black's thrust into the center.]
goWriteeXtension[Marks=M003LL]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[cc]
Black[gh]
Comment[B77 Black continues to push out into the center area. B77 also threatens to cut off the upper left White group. White must now secur the upper left group. It does not yet have space for two eyes since, as we saw previously, the marked White stone cannot be rescued.]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[hf]
White[hd]
Comment[W78 White assures eye space for his top left side group. This helps to reduce Black's top center area. Note that White is   

endeavoring to keep sente. Without W78, or a nearby point, White's upper left group could come under severe attack, at `A' for instance.]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[hi]
Comment[B79 This is an urgent point for Black which pushes into    

White's potential territory in the center.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[ei]
Mark[fi]
[gi]
White[gk]
Comment[W80 This is a normal defensive move. It is needed because of White's    

cutting point problems. Without W80 a black stone    

at `A' would allow a Black penetration into the center area because the two marked White stones would be reduced to only two liberties and hence would become vulnerable. W80 also makes White's lower center area much more secure.   

]
goWriteeXtension[Marks=LM003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[id]
Black[he]
Comment[B81 A nice squeeze move. It helps the marked Black stone and the whole   

upper Black group. This also puts pressure on   

White's not-too-secure upper left group.]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[ic]
Comment[W82 Aims to gain eye space along the top for White's vulnerable group, and threatens to further reduce Black's upper potential territory at the same time.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[hd]
Black[hc]
Comment[B83 This is a severe and necessary cut in answer to W82 which was a serious threat to push into Black's large potential territory at the top. This attack on the marked White stone will allow Black to secure the rest of the top center territory.]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[hc]
[hd]
White[gd]
Comment[W84 The only move. It saves the squared White stone and assures two eyes for the upper left   

White group. The marked Black stone cannot now   

escape. White will have several aggressive options, depending on Black's   

next move]
goWriteeXtension[Marks=M003M002]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[hd]
[gd]
Letter[fb]
Mark[cb]
[db]
[eb]
[dc]
Black[gc]
Comment[B85 A forcing move. It puts the two triangle-marked White stones in atari. White needs to save these two stones to make two eyes and continue the effort to reduce Black's top enclosure. However, in saving these two stones White will allow Black to connec to the four stone group, marked with squares, by playing at `A'.]
goWriteeXtension[Marks=M003M003LM002M002M002M002]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[he]
[id]
White[ge]
Comment[W86 This is the correct move. It makes needed eye space and threatens   

the marked Black stones.]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[fd]
Black[gf]
Comment[B87 Good forcing move. It is atari on the three White stones and also Sente. White cannot ignore this atari. Note how Black has made good use of the triangulated sacrifice stone, which enabled these several forcing moves.   

   

]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[fe]
Comment[W88 The only move as White captures the Black stone.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[gc]
[hc]
Black[fb]
Comment[B89 This is also a must move. It not only saves the two marked Black stones but makes territorial gains underneath. However, it also leaves open a good move for White.]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[ie]
Comment[W90 White's severe double atari enables a White push into the center.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[hf]
Black[jd]
Comment[B91 The correct choice. This move is more valuable than a Black move at `A'   

would have been because it divides White into three separate groups and secures Black's large territory along the top.   

]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[bl]
White[hf]
Comment[W92 The only move. Otherwise White's thrust into the center would   

get cut off. This also continues White's   

pressure on the left side Black group, which still does not have two assured   

eyes. \(A White move at `A' remains a big sente threat to Black.\)]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[hh]
Mark[gf]
Black[ih]
Comment[B93 Black's best move to defend the cutting point at `A.' Note that the marked Black stone is in atari but Black must ensure a continued thrust into the center in order to reduce   

White's large potential territory there. This move is more effective than playing at `A' because it provides more options for Black.]
goWriteeXtension[Marks=LM003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[ij]
Comment[W94 A nice move because it has two meanings: It develops White's strength in the center and it also   

threatens Black's insecure left side group.   

To see why, bring down the Variation window and click on Variation 4. ]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
(
;
Black[bl]
Comment[B95 Therefore, Black moves to make definite eye space besides gaining valuable territory. White has had no opportunity to play here first.   

   

]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[od]
Comment[W96 White goes back to the probing the corner again. White is still seeking to find a way to reduce what seems likely to be very large territory for Black in this corner. This is also a sente move because it threatens to capture the marked Black stone. ]
;
Black[nc]
Comment[B97 Black blocks a capture, creates a multi liberty group and protects the top-center territory. Black must not allow White to get established in this corner.]
;
White[qb]
Comment[W98 White takes away one Black liberty and makes an atari. This move is sente, because White threatens to make life, \(two eyes\), in the upper right corner.]
;
Mark[qg]
Black[pd]
Comment[B99 An aggressive move which threatens to capture all the White stones   

in the corner. This move assures a solid   

connection with the lone marked Black stone below and thus assures Black   

territory on the upper right side.]
goWriteeXtension[Marks=M003]
;
White[pa]
Comment[W100 Takes one Black stone off the board and again White threatens to make life in the corner.]
;
Letter[qc]
[rb]
Black[rc]
Comment[B101 This is the key spot to reduce the White shape and make the White   

shape killable. If White now plays at `A' Black will play at `B', or vice-versa. As the situation stands, White has no way to make life in this corner. But the outside situation can change and White can make use of these stones. For one thing, White still has sente and can move where he or she wishes. \(White has lost nothing with all these   

corner moves because each one was a serious threat and Black answered every White move there.\)]
goWriteeXtension[Marks=LL]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[ob]
[pc]
[qb]
[pa]
White[oe]
Comment[W102 Increases the liberties of the White cutting stone and thus separates the two Black groups. The marked White    

group in the upper right corner is looks dead but by playing this way, White may have   

succeeded in reducing Black's potential along the upper right side.]
goWriteeXtension[Marks=M003M003M003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[od]
[oe]
Black[kf]
Comment[B103 Black jumps out to contain the upper left White group and threatens to cut off the two marked White stones.]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[qf]
White[me]
Comment[W104 Helps the marked White stones to connect with the White group below. It also sets up a threat. What if White plays at 'A'?    

Bring down the Variation window from the Window menu and look at Variation 5 in the Variation window.]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
(
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[qc]
Comment[B105 Therefore, Black must play here. This is a \"thick\" move which kills the White group for sure. *`Thick'*generally means a 'solid' move. In this case, it is a clear sure move that leaves no remaining eye space and no meaningful cutting points for White to exploit.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[od]
[oe]
[me]
[pd]
[qd]
[qc]
[rc]
[ob]
[pc]
[qb]
[pa]
White[pf]
Comment[W106 This is a 'forcing move' which threatens to cut off the Black stones marked with squares from the group above, or force them to take the White group, marked with circles, while White captures the single Black stone. It is therefore a sente move. It also helps the three triangle-marked White stones and assures a connection with the White group below.   

 ]
goWriteeXtension[Marks=M003M003M003M002M002M002M002M001M001M001M001]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[qg]
Black[qf]
Comment[B107 Black connects to assure upper right territory and save the marked stone.]
goWriteeXtension[Marks=M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Mark[jp]
[jo]
White[ko]
Comment[W108 Another sente move which threatens to atari the   

two marked black stones. It also reduces Black's potential territory. This move begins the \"Endgame\". Invasions, large territory posibilities,   

cutting attacks, etc. are all in the past. Every seemingly dead group can   

connect to one that is alive.   

]
goWriteeXtension[Marks=M003M003]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[jq]
Black[kp]
Comment[B109 This move is necessary. Black was short of liberties here and needed to protect the cutting point at A.]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[bm]
Comment[W110 The best end-game move on the board. Without this move Black could slide down into White's lower left corner.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[gr]
Comment[B111 The biggest move which now remains.   

White must respond or Black will keep pushing on into White's lower left corner area.   

]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[fr]
Comment[W112 White blocks Black's threat to push into White's corner territory.]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[hr]
Comment[B113 Black connects. Black is well ahead in territory at this point. A strong player would be quite aware of this by now and would resign. Black's territory at the top, bottom and sides is about 70. White's territory on the lower left, center, and on the right is about 50. \(The center is just an open area and there is no meaningful territory to be had there.\)   

  

To see an approximate scoring, go to the next diagram.]
;
FG[]
Comment[This is an approximation of absolutely secure territory on both sides. White has the triangled points, Black the squared. Remember that there were some prisoners taken \(which count an additional point\) and that prisoners left on the board count two, one for the stone and one for the point. Normally, White would have received 5 1/2 points 'komi' \('ko-mee'\) because Black moved first. Thank you. If you like you can play your own game. Go to the file menu and click on 'New.' Or you can open up the other commented games in this file.]
goWriteeXtension[Picture=aass000000]
;
Mark[bn]
[cn]
[dn]
[bo]
[ao]
[bp]
[cp]
[ap]
[do]
[dp]
[cq]
[bq]
[aq]
[dr]
[cr]
[br]
[ar]
[ds]
[cs]
[bs]
[as]
[en]
[gn]
[fn]
[eo]
[hm]
[gm]
[fm]
[fl]
[fk]
[gl]
[hl]
[im]
[sl]
[sm]
[rn]
[sn]
[ro]
[so]
[rp]
[sp]
[ee]
[de]
[fd]
[il]
[em]
[fj]
[cc]
[bb]
[ab]
[aa]
[ba]
[ca]
[da]
[ea]
[fa]
[ob]
[pc]
[qb]
[pa]
[pb]
[rb]
[ra]
[qa]
[sb]
[sa]
[sc]
[rd]
[sd]
[re]
[se]
[rf]
[sf]
[hs]
[is]
[ir]
[jq]
[kq]
[jr]
[kr]
[lr]
[js]
[ks]
[ls]
[mq]
[nq]
[or]
[os]
[ns]
[nr]
[mr]
[ms]
[oa]
[mb]
[na]
[ma]
[lc]
[kc]
[jc]
[ic]
[lb]
[kb]
[jb]
[la]
[ka]
[ja]
[ib]
[gb]
[hb]
[ga]
[ha]
[ia]
[bh]
[bj]
goWriteeXtension[Marks=M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M003M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002M002]
)
(
;
FG[]
Comment[Click again \(or twice\).]
goWriteeXtension[Picture=aass001000]
;
White[qf]
;
Black[pf]
Comment[White plays 1 and if Black tries to block . . .]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Letter[rb]
White[qc]
Comment[White plays 3 and threatens to live by playing at 'A' to make two eyes. So . . .]
goWriteeXtension[Marks=L]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[rb]
Comment[Black plays 4 to kill the group. Next . . .]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[pe]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[qe]
;
White[rf]
Comment[A deadly 'descent' move which sets up a 'miai' situation as it did in Move 37. . . . ]
;
FG[]
Comment[If Black plays 'A' to save the three squared stones, White plays 'B' and saves the two triangled stones by connecting with the group on the left side.  

  

To see the other possiblity \(if Black plays 'B' to block\), continue clicking the Next Move icon.]
goWriteeXtension[Picture=aass000000]
;
Letter[rd]
[rg]
Mark[pd]
[qd]
[qe]
[qf]
[rf]
FG[]
goWriteeXtension[Picture=aass000000Marks=LLM002M002M002M002M002]
;
Black[rg]
;
White[rd]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
AddWhite[re]
Comment[Now Black's three stones do not look very healthy, either.]
FG[]
goWriteeXtension[Picture=aass000000]
;
FG[]
Comment[Once you are on 'End' in the Variation Window, return to the game by clicking on the line below End. ]
goWriteeXtension[Picture=aass000000]
)
)
(
;
FG[]
goWriteeXtension[Picture=aass001000]
;
White[af]
Comment[White plays here first forcing . . . ]
;
Black[ag]
Comment[B2. Next . . .]
;
White[bi]
;
Black[ci]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[bh]
;
Black[cg]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[bl]
;
Black[bk]
Comment[Black can block at 8 or above 8--it doesn't matter.   

Suppose things stay like this for a while, but White steadily surounds the Black group. Just keep clicking the Next Move icon.]
;
AddWhite[dg]
[eg]
[fg]
[gg]
[hg]
[ig]
[jh]
[ii]
AddBlack[hh]
AddWhite[hj]
[ei]
FG[]
goWriteeXtension[Picture=aass000000]
;
White[bj]
;
Black[ak]
;
FG[]
Comment[It is impossible for Black to get two eyes or to make a 'seki'--which means that neither Black nor White can capture or are in atari. Click on the next move.]
goWriteeXtension[Picture=aass000000]
;
AddWhite[cl]
[dk]
;
Black[aj]
Comment[If Black tries]
;
Black[ai]
;
White[ah]
;
Black[ah]
;
AddWhite[bi]
Comment[White 'throws in' at the vital spot \(If Black could have played here, there would have been two eyes.\) Next . . . ]
;
White[bj]
Comment[Black has two liberties. If White fills one of them, Black is in atari and if he or she takes, the group is still in atari.]
;
Black[bh]
;
White[bi]
;
White[al]
;
FG[]
Comment[Click on the line below End to continue the game.]
goWriteeXtension[Picture=aass000000]
)
)
(
Comment[Click twice on the Next Move icon to see the Variation.]
;
FG[]
goWriteeXtension[Picture=aass001000]
;
White[nn]
;
Black[lm]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[ln]
;
Black[mn]
;
FG[]
Comment[You should be on 'End' in the Variation window. Click on the line below 'End' to resume the game. It may take several clicks.]
goWriteeXtension[Picture=aass000000]
)
)
(
;
FG[]
goWriteeXtension[Picture=aass001000]
;
Black[oo]
;
White[on]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
Black[po]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[pm]
;
FG[]
Comment[Click on the line just below End in the Variation window to resume the game. This may require some extra clicking.]
goWriteeXtension[Picture=aass000000]
)
)
(
Comment[Click again\(you may have click twice or three times\) on the Next Move icon..]
;
FG[]
goWriteeXtension[Picture=aass001004]
;
White[nq]
;
Black[nr]
;
FG[]
goWriteeXtension[Picture=aass000020]
;
White[or]
;
Black[pr]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[mr]
;
Black[os]
;
FG[]
goWriteeXtension[Picture=aass000000]
;
White[mq]
;
FG[]
Comment[Click again and you will see how Black has two eyes at 'A' and 'B'--and no outside influence as the next click will reveal. That will be the end of the Variation.   

Make sure that 'End' is outlined in blue \(i.e. that you are at the end of the Variation\) and then click on the small line on the left just below the End in the Variation window. It may take up to five or ten clicks \(you computer must recompose itself\) but you will return to the game]
goWriteeXtension[Picture=aass000000]
;
Letter[or]
[ps]
goWriteeXtension[Marks=LL]
)
)
