(;AP[HexGui:0.10.GIT]
C[2021/05/21

Black\: Sarah
White\: Bian

Handicap\: 0.5

White wins.]
FF[4]GM[11]PL[B]SZ[11];B[f6];W[d9];B[f9];W[f7];B[g7];W[f8];B[g8];W[g6];
B[i5];W[h6];B[i6];W[h7];B[i7];W[h8];B[i8];W[i4];B[h5];W[h4];B[g5];W[g3](
;B[e3]C[Maybe g4 would have been better, see next variation.];W[e4](;
B[d5]
C[This doesn't work, and neither does any other move; see next variations.]
;W[d4];B[resign])(;B[d4];W[d5])(;B[c5];W[d6];B[c7](;W[d7](;B[c8]
C[Eric\:


Now White wins even if it's Black's turn again\:

Black can't cut D9 off without giving White a ladder escape.]
;W[b10];B[d8];W[e7];B[resign])(;B[b8]
C[Eric\:

Due to F7+F8, White wins anyway, but locally, this is why C6 was better than D7.]
))(;W[c6])))(;B[g4];W[h3];B[e4];W[e3];B[f3];W[g1];B[j2];W[h2];B[k3];
W[j4];B[k4];W[j5];B[k5];W[j6];B[k6];W[j7];B[k7];W[j8]))
