(;AP[HexGui:0.10.GIT]
C[2020/09/22

Black\: Bian
White\: Peter

White wins.
]FF[4]GM[11]SZ[11]
;B[k10];W[g5];B[f6];W[e4];B[f5];W[g3](;B[g4]
C[Losing move. 

Perhaps h4 or h3 would have been better? See next variations.]
;W[h3];B[i3];W[h4];B[i4];W[h6];B[i6];W[j2];B[i2];W[h7];B[g6](;W[e7]
C[Since e4 is already connected to the a-edge by a template, h5 would have been an immediate win (see next variation).]
(;B[f8]
C[This move does next to nothing, since White still has the easy win at h5 available.

The position is winning for White, but Black's best try is d6, forcing White to choose between connecting e4 and e7. See next variation.]
;W[h5];B[resign])(;B[d6]
C[This does not work here, because White has enough room in the a1-corner to force a 3rd row ladder from e4.

But if Black had at least c1, this would now be winning for Black.]
;W[c8];B[f8];W[h5];B[d4];W[d5];B[b6];W[c6];B[b7];W[c7]))(;W[h5]
C[h5 variation\: winning for White.];B[k5];W[i5];B[j4];W[j5];B[k4];W[j7]
))(;B[h4]C[h4 variation.];W[h2];B[i2];W[g4];B[h5];W[g7];B[i6];W[i7];
B[h7];W[g9];B[g6];W[e8];B[d8];W[e7];B[d7];W[e6];B[d6];W[e5];B[d4];W[d5];
B[b6];W[b10];B[c9];W[c5];B[b5];W[c4];B[b4];W[c2];B[c3];W[d2];B[d3];W[e2]
;B[e3];W[g1];B[f8];W[f7];B[g8];W[e10];B[c10];W[e9];B[k6];W[h9];B[j8];
W[j6];B[k5];W[j5];B[k4];W[j4];B[k3];W[j2];B[j3];W[i3];B[h3];W[i4])(;
B[h3]C[h3 variation.];W[g4];B[f3];W[f4];B[j4];W[h2];B[k2];W[k1];B[i2];
W[i4];B[h5];W[h4];B[j2];W[i6];B[i5];W[g7];B[k5];W[j7];B[h7];W[h6];B[i7];
W[j6];B[d4];W[d5];B[g6];W[e8];B[d8];W[c9];B[a10];W[c8];B[b8];W[c7];B[b7]
;W[c6];B[e7];W[d9];B[f7];W[f8];B[a6];W[b6];B[a7];W[b5];B[a5];W[b3];B[b4]
;W[c3];B[c4];W[e2];B[e3];W[g1]))
