(;AP[HexGui:0.10.GIT]
C[2021/06/25

Black\: Peter
White\: Frank

Black wins.
]FF[4]GM[11]PL[B]
SZ[11];B[a7];W[swap-pieces];B[i3];W[h2];B[j3];W[h9];B[i9];W[h10];B[i10];
W[i8];B[j6];W[k7];B[e5];W[d8];B[f7];W[g4];B[g7](;W[d9]
C[Eric\:

I'm not sure I would've seen this at the time, but now Black has a forced win.  Black kept it for the rest of the game.

See the next two variations for alternatives.]
;B[h7];W[i6];B[h5];W[f9];B[e9];W[d11];B[f10];W[e10];B[g9];W[resign])(;
W[h5]C[Eric\:

White can cut Black off.];B[i5];W[h6];B[i7];W[g8])(;W[e9]
C[Eric\:

White might even try for this first.];B[f9];W[e10];B[f10];
W[h5]))
