(;
AB[dd][dc][de][ee][ef][fg][gf][id][dp][fq][pp][pd][nd][og][oh][oi][nk]
AW[cc][cd][ce][df][dg][eg][cn][fc][qf][ql][ph][pi][pj][kc]
TR[kc]
C[Black's response to the marked invasion?

Source:
    How to Play Handicap Go, Part V
    James Kerwin 1P
    American Go Journal, Vol. 28, No. 3, pp. 34-35];
B[ic]
C[A good start.  Black doesn't make the mistake of going all out for the kill.  Black's plan is to build territory and outside thickness while attacking White in sente.];
W[nb]
(;
B[mc]
C[But with this move, Black goes wrong.];
W[mb]
C[White proceeds to make a living shape.];
B[lc];W[lb];B[kd];W[jc];B[jd];W[ib];B[hb];W[jb]
C[White lives too easily.];
B[fi]
C[After creating thickness at the top in sente, Black turns to increase the scale of the center moyo.];
W[dj];B[el]
C[White has lived small at the top, so White has actually fallen even further behind in territory.  So what's the problem for Black?

First of all, White is not defending at the top any more.  So White has the opportunity to make mischief.  Secondly, Black's major asset is the center moyo, so if White can limit the size of the moyo, White is immediately in the game.  Things are looking up for White.]
)
    (;
    B[pb]
    C[Black should simply block here instead.];
    W[mc]
    C[White tries to settle quickly, but ...];
    B[jb]
    C[... Black steals White's eyes by descending here.];
    W[ke]
    C[White tries to run out, but ...];
    B[kg]
    C[... Black blocks the escape.  White is seriously in danger of dying, but Black doesn't have to kill White for a winning advantage.

The difference in this variation with the game line is that Black can continue attacking the top group for much longer.  Then Black can use that extra center power to take solid profit at the bottom instead of the more open center.  If Black can accomplish this, the game will be over.]
    )
)

