(;AP[HexGui:0.10.GIT]
C[2022/02/25

Black\: Sarah
White\: Bian

Handicap\: 0.5

Black wins.
]
FF[4]GM[11]PL[B]SZ[11];B[f6];W[e9];B[h8];W[h3];B[d3]
C[Eric\:

This is a bit too close to Black's edge. c4 would be a standard corner move.]
;W[f5];B[e6];W[e5];B[c6];W[d4];B[b5];W[c4];B[b4];W[c2];B[c3];W[b6];B[c5]
;W[d6];B[c7](;W[c9]
C[Eric\:

Due to analysis with ghosts, I can now prove that Black wins.]
;B[d7];W[f10];B[i8];W[g8]
C[Eric\:

White should either play F7 or intrude in the D3 ziggurat.];
B[h7];W[g7];B[h5];W[h6];B[j5];W[f2];B[i3]
C[Eric\:

J2 wins even if D9 is white.

Peter\: 

So do I3 and I4.];
W[j1];B[k1]C[Eric\:

I5 wins even if D9 is white.

Peter\: or J3.];W[i4]
;B[e1];W[i5];B[k3];W[k2];B[j3];W[j2];B[h4];W[resign])(;W[d8]
C[Eric\:  possibly here];B[d7]))
