(;
AB[bd][cd][de][df][cf][bf][bh][bj][bk][bl][bo][aq][br][cr][dq][dp][do][dn][em][fm][gm][fk][ek][ei][fh][fg][eg][ed][fd][gd][gb][hc][ic][jc][jb][je][kd][ld][nd][oe][pd][qd][qc][rc][pf][pg][ph][qh][qi][mf][lg][li][ki][kj][jj][ii][hi][hh][hg][hl][il][jl][jo][ir][hr][gq][fq][fr][qr][pr][pq][qp][rp][rn][pn][po][np][pm][pl][pk][qk][sk][rl][sl][mj][nj][ni][oi]
AW[bb][bc][dc][dd][ec][fc][fb][gc][hb][ib][hd][he][ge][ee][ef][bg][dg][dh][eh][di][dj][dk][dl][dm][el][bm][am][cn][co][cp][cq][bq][ap][en][gn][fn][hn][hm][jm][km][fp][gp][gr][hq][iq][jq][jr][lp][nq][nr][op][pp][qq][rq][rr][oo][on][om][nk][mk][lk][ij][ji][jh][ih][if][jf][kf][ke][lj][mi][oj][pj][pi][qj][rj][rk][sj][ri][rh][qg][qf][qe][pe][rd][re][ql]
C[White plays.

Source:
     "Upsetting Moves", Sonoda Yuichi 8P
     Go World #10, p. 49]
;
C[Hint:  A, B, or somewhere on the left side.]
LB[oh:A][rs:B]
(;
W[oh]
C[A clever and big move, but gote.  After Black protects the big left side group, a simple whole board scoring shows that White is hopelessly far behind.

But just for completeness, play out the sequence to see what White can do locally.];
B[nh]
C[Black can temporarily save the 4 stones in atari, but ...];
W[ng]
C[... White has this follow up to capture some stones.]
(;
B[og];W[mh]
C[Black has a liberty shortage.]
)
    (;
    B[mh];W[of]
    C[White captures the 5 stones in a snapback.]
    )
)
    (;
    W[rs]
    C[Another clever and big move, but also gote.  Again, a simple whole board scoring shows that White is hopelessly far behind.

Play out the sequence to see how White can capture the 3 stones in the lower right corner.  Black must make an approach move, so White wins this corner semeai by 1 move.  Locally, White's move is worth 16 points.];
    B[sr]
    C[White only has to be careful of this trick move.]
    (;
    W[sq]
    C[Too greedy.];
    B[sp]
    C[Now Black wins the semeai.]
    )
        (;
        W[or]C[White takes the lower right corner.]
        )
    )
    (;
    W[ai]
    C[Correct!  The only way for White to win the game is to make a 2nd eye for the big left side group by capturing some stones.]
    (;
    B[ah]
    C[Black cannot save all his left side stones by blocking here.];
    W[bi];B[ci];W[ag]
    C[White cuts and captures the stones above.]
    )
        (;
        B[bi]
        C[Another unsuccessful attempt to save all his stones.];
        W[cg];B[ag];W[ah];B[af];W[al]
        C[Black entire left side group has only 1 eye, and White has more than enough liberties to kill the group.]
        )
        (;
        B[cg]
        C[Pushing here may not look good, but Black has nothing better.];
        W[bi]
        C[White makes a 2nd eye by capturing the 3 stones below.];
        B[ch];W[ci];B[lh]
        C[Next, Black protects all his stones in the center right area.];
        W[rs]
        C[Finally, White takes the last big point to capture the corner.

White is ahead by about 15 points on the board.]
        )
    )
)

