(;AP[HexGui:0.10.GIT]
C[2020/05/29

Black\: Bian
White\: Frank

White wins.]FF[4]GM[11]SZ[11];
B[f8];W[swap-pieces];B[d6];W[d5];B[f5];W[c9];B[f7];W[e6];B[e5];W[f6];
B[g6];W[g5];B[h5];W[h4];B[i4];W[i3];B[k2];W[j3];B[k3];W[j4];B[k4]
C[Note\: White can connect to the k-edge with Tom's move, or White can connect to the a-edge with d8 or d7. But not both at the same time!]
;W[d7];B[j6];W[j5];B[k5];W[i7];B[i6];W[i5];B[h7]
C[Note\:  Black is connected to the 1-edge, because template C-5 can be used as a ladder escape.

http\://www.mseymour.ca/hex_book/hexstrat9.html#section_112

See variation 2 of the next move.]
(;W[g9];B[e9];W[f8];B[i9];W[i8];B[d8]
C[This is a fatal move. Black was winning (according to Mohex) but with this move is now losing.]
;W[j9]
C[White's k-edge is now connected up to f8 by edge template and bridges. Then there's a double treat at e8 and g7, connecting either to White's main group or c9, both of which are connected to the a-edge.]
;B[b8];W[e8]C[White maintains the win.];B[c6];W[d4]
C[A wasted move and a loss for White. a10 would have been a simple win for White.]
;B[a10];W[f3];B[g3];W[resign])(;W[k1];B[j2];W[j1];B[i2];W[i1];B[g3];
W[h2];B[h3];W[g1];B[g2];W[h1];B[e2];W[f2];B[e3]))
