(;AP[HexGui:0.10.GIT]
C[2022/06/10

Black\: Scott
White\: Sarah

Handicap\: 0.5

White wins.
]
FF[4]GM[11]PL[B]SZ[11];B[f6];W[e3];B[i3];W[h9];B[c9];W[e7];B[f7];W[g5];
B[f5];W[g3];B[h5];W[e9];B[d7];W[g6];B[g4];W[e6];B[e8];W[d9];B[d8];W[b11]
;B[h7];W[f10];B[e10];W[h3];B[j2];W[h4];B[j4];W[i4];B[j3];W[i5];B[j5];
W[i6];B[c10]
C[Eric\:

Now I can prove that White wins.

White keeps this win until i7.
]
;W[e4];B[b3];W[c5];B[k6](;W[i7]
C[Eric\: Now Black wins.

Black has forcing moves on the left that keep Black's win, but those don't help, and Black has otherwise exactly 1 winning move.

White should have played j6, see next variation.
]
(;B[j8]
C[Eric\: Losing move.

I am back to being able to prove that White wins.

This time, White keeps the win for the rest of the game.

Black should have played i8, see next variation.
]
;W[i10];B[k9];W[j11];B[a6];W[b7];B[resign])(;B[i8]
C[Eric\: I went over this with setup stones and ghosts and changing board-size in another room, and found that i8 wins for Black.
]
;W[h8];B[i9];W[j10];B[j7];W[h11];B[h10];W[g11];B[g10];W[f11];B[g9];W[f9]
;B[g8];W[c11];B[d10]))(;W[j6]C[Eric\:

forcing move,];B[k5];W[i8]
C[Eric\:

then template]))
