(;AP[Hexon:0.0]FF[4]GM[11]SZ[11]C[2023/03/10

Black\: Frank
White\: Mason

White wins.
]PL[B]
;B[a7]
;W[swap-pieces]
;B[i3]
;W[d8]
;B[i8]
;W[i9]
;B[h9]
;W[f10]
;B[j7]
;W[i6]
;B[j4]
;W[k5]
;B[c4]
;W[c3]
;B[d3]
;W[h7]
;B[f8]
;W[e9]
;B[e10]
;W[g6]
;B[e7]
;W[e8]
;B[f7]
;W[e6]
;B[d7]
(;W[d6]C[Peter\: I think d5 may have been better for White. See the next variation.]
 ;B[f6]
 ;W[g4]
 ;B[h5]C[Peter\: i4 (or even j3) is much better. They threaten the same thing, but also create a 3rd row ladder escape.]
 ;W[g5]
 ;B[f5]
 ;W[e3]
 (;B[f4]C[Peter\: Maybe e4 would have been winning? See the next variation.

Eric\: Via extensive analysis with ghosts, I manually verified that blackE4 was indeed winning.]
  ;W[g2]
  ;B[d5]
  ;W[e1]
  ;B[d2]
  ;W[d1]
  ;B[b2]
  ;W[c2]
  ;B[a4]
  ;W[b4]
  ;B[a5]
  ;W[b5]
  ;B[a6]
  ;W[b6]
  ;B[a7]
  ;W[b7]
  ;B[a8]
  ;W[b8]
  ;B[a9]
  ;W[b10]
  ;B[resign])
 (;B[e4]
  ;W[f4]
  ;B[e5]
  ;W[e1]
  ;B[f1]
  ;W[f3]
  ;B[b5]
  ;W[d4]
  ;B[c6]))
(;W[d5]
 ;B[f6]
 ;W[g4]
 ;B[e5]
 ;W[d6]
 ;B[i4]
 ;W[g5]
 ;B[f5]
 ;W[f3]
 ;B[e4]
 ;W[e3]
 ;B[b5]
 ;W[d4]))
