(;AP[Hexon:0.0]FF[4]GM[11]SZ[11]C[2023/03/24

Black\: Sarah
White\: Peter

White wins.
]PL[B]
;B[i2]
;W[f6]
;B[g6]
;W[f7]
;B[g7]
;W[g5]
;B[i4]
;W[h5]
;B[i5]
;W[h8]
;B[h7]
;W[f9]
;B[f8]
;W[e9]
;B[e8]
(;W[c10]C[Peter\: This move is bad. d9 would have been much better (winning?). The point is that White has no trouble escaping a 4th row ladder, but only in the presence of a foldback threat. ]
 ;B[b10]
 ;W[c9]
 ;B[b9]C[Peter and Eric\: j5 would be a good move for Black, because it requires a white response in the k11 corner area, while also connecting the i5 group to the 1-edge.
]
 ;W[d6]
 ;B[c7]
 ;W[f4]
 (;B[j2]C[Peter\: Losing move. Black j5, or even d7, would have been winning, with j5 the more obvious win. See the next variations.]
  ;W[d8]
  ;B[c6]
  ;W[d4]
  ;B[c4]
  ;W[c5]
  ;B[a6]
  ;W[b8]
  ;B[resign])
 (;B[j5]C[Peter\: This is connected to the 1-edge, and also to the 11-edge by double threats at d7 and i8.]
  ;W[d8]
  ;B[i8]
  ;W[i7]
  ;B[k6]
  ;W[j9]
  ;B[j8]
  ;W[h10]
  ;B[g9]
  ;W[f11]
  ;B[d10])
 (;B[d7]C[Peter\: This is also winning for Black, although it requires the a1 area.]
  ;W[i3]
  ;B[g4]
  ;W[h4]
  ;B[e6]
  ;W[g3]
  ;B[d4]
  ;W[d5]
  ;B[e4]
  ;W[e5]
  ;B[b6]))
(;W[d9]
 ;B[c9]
 ;W[b10]
 ;B[c10]
 ;W[d8]
 (;B[c8]
  ;W[d7]
  ;B[c7]
  ;W[d5])
 (;B[b8]
  ;W[c8]
  ;B[b9]
  ;W[c6]
  ;B[c7]
  ;W[d6]
  ;B[d7]
  ;W[e7]
  ;B[e6]
  ;W[f4])))
