(;AP[Hexon:0.0]FF[4]GM[11]SZ[11]C[2022/07/29

Black\: Thomas
White\: Peter

Handicap\: 1.5

White wins.
]PL[B]
;B[e8]
;B[f6]
;W[f4]
;B[g4]
;W[h2]
;B[i3]
;W[h4]
;B[h3]
;W[j1]
;B[k1]
;W[g5]
;B[f5]
;W[j2]
(;B[k2]C[Eric\:


From now until at least just before move 24, Black can win by climbing on the A-edge part of the board, without needing anything on the K-edge side of the G line.

https\://www.hexwiki.net/index.php/Climbing

See the variation.]
 ;W[j3]
 ;B[k3]
 ;W[i5]
 ;B[j5]
 ;W[j4]
 ;B[k4]
 ;W[i7]
 ;B[i6]
 ;W[g7]
 (;B[h7]C[Eric\:


Black still had enough room to climb along the a-edge part of the board without needing Black's k-edge chain.

https\://www.hexwiki.net/index.php/Climbing

See the variation.]
  ;W[g9]
  ;B[g8]
  ;W[f9]
  ;B[h8]
  ;W[h9]
  ;B[j8]
  ;W[i10]
  (;B[d10]C[Peter\: This wins, but d8 is better. See next variation.]
   ;W[d9]
   ;B[e9]
   ;W[f8]
   (;B[e5]C[Peter\: Black had an easy win by climbing, see next variation. This move makes it much harder.]
    ;W[e4]
    ;B[g3]
    ;W[g2]
    ;B[f3]
    ;W[f2]
    ;B[e3]
    ;W[e2]
    ;B[c3]
    ;W[d3]
    ;B[c4]
    ;W[d4]
    ;B[c5]
    ;W[d5]
    (;B[c6]C[Peter\: I think if Black had yielded at this exact moment, Black would have won. See next variation.


Eric\:

I confirm that it does win.]
     ;W[d6]
     ;B[c7]C[Peter\: Yielding here would still have worked too.

But now Black is losing.]
     ;W[d8]
     ;B[c9]
     ;W[c8]
     ;B[a9]C[Eric\:

Now White can pass, since the ladder escape fork at B3 (or B2) is another way for White to connect to the A-edge.]
     ;W[b10]
     ;B[resign])
    (;B[b7]
     ;W[c6]
     ;B[b6]
     ;W[c8]
     ;B[c7]
     ;W[e7]
     ;B[d7]))
   (;B[g3]
    ;W[g2]
    ;B[e3]
    ;W[f3]
    ;B[d5]
    ;W[e5]
    ;B[d6]
    ;W[e7]
    ;B[c8]
    ;W[d8]
    ;B[b10]))
  (;B[d8]C[This connects to the 11-edge by an edge template, and also "caps the flank" to make climbing easier from the other direction.

https\://www.hexwiki.net/index.php/Edge_template_IV2a

https\://www.hexwiki.net/index.php/Flank
]
   ;W[f8]
   ;B[g3]
   ;W[g2]
   ;B[e3]
   ;W[f3]
   ;B[d5]
   ;W[e5]
   ;B[d6]))
 (;B[g3]
  ;W[e7]
  ;B[f7]
  ;W[g2]
  ;B[e3]
  ;W[f3]
  ;B[d5]
  ;W[d4]
  ;B[e4]
  ;W[e5]
  ;B[d6]
  ;W[e6]
  ;B[c8]
  ;W[c7]
  ;B[d7]))
(;B[g3]
 ;W[g2]
 ;B[e3]
 ;W[f3]
 ;B[d5]
 ;W[d4]
 ;B[e4]
 ;W[e5]
 ;B[d6]
 ;W[e7]
 ;B[c8]C[Eric\:


Black can defend the F6-E8 bridge\:

Black doesn't need F7 for C8 and E8 to connect to the 11-edge.]))
