(;AP[Hexon:0.0]FF[4]GM[11]SZ[13]C[2023/01/13

Black\: Comonoid
White\: Mason

Black wins.
]PL[B]
;B[c2]
;W[d10]
;B[j9]
;W[j4]
;B[b5]
;W[d5]
;B[c7]
;W[j10]
;B[i10]
;W[g9]
;B[k5]
;W[j3]
;B[k3]
;W[k2]
;B[l4]C[Peter\: White's k2 was a tactical mistake, and Black could have punished it by playing l5 (threatening l2).]
;W[i6]
;B[l2]
;W[j7]
;B[i7]C[Comonoid\: Probably a mistake.]
;W[i8]
;B[k8]
;W[l6]
;B[h8]
;W[g8]
;B[h9]
;W[j6]
;B[e8]
(;W[d11]C[Comonoid\: f8 should be winning for White, see the next variations.]
 ;B[f8]
 ;W[c4]
 ;B[b8]
 ;W[f4]
 ;B[f6]
 ;W[h7]
 ;B[e10]
 ;W[c5]
 ;B[g4]
 ;W[resign])
(;W[f8]
 (;B[c10]
  ;W[c11]
  ;B[a12]
  ;W[b11]
  ;B[a11]
  ;W[b10]
  ;B[a10]
  ;W[b9]
  ;B[a9]
  ;W[b8]
  ;B[a8]
  ;W[b6]
  ;B[b7]
  ;W[e6]
  ;B[d8]
  ;W[f7])
 (;B[f7]
  ;W[h6]
  ;B[c10]
  ;W[c11]
  ;B[a12]
  ;W[b11]
  ;B[a11]
  ;W[b10]
  ;B[a10]
  ;W[b9]
  ;B[a9]
  ;W[b8]
  ;B[a8]
  ;W[b6]
  ;B[b7]
  ;W[e6])))
