(;AP[HexGui:0.10.GIT]
C[2021/12/17 - 2022/01/14

Black\: Marietje
White\: Peter

Handicap\: 0.5

White wins.]
FF[4]GM[11]PL[B]SZ[11];B[h4];W[e7];B[f7];W[h5];B[g5];W[e9](;B[h8]
C[Game paused after this move. Continued on 2022/01/14.

Eric\: g8 looks good for Black, see next variation.]
(;W[f10]
C[Eric\:

I went through the game probably twice before spotting this, but now, f9 wins for Black. See next variation.]
;B[c9];W[d8];B[c8];W[d6];B[c6]
C[Eric\:

D6 is connected to the A-edge by Tom's move, so Black should look to the K11 side of the board.]
;W[c4];B[b5];W[d3];B[d5];W[e4];B[e5];W[c7](;B[f5]
C[Peter\: Wasted move. Better\: i8.

Eric\: f9 is still winning for Black, see next variation.]
;W[h9];B[a8];W[b7];B[a7];W[b6];B[a6];W[c5];B[b4];W[c2];B[d2];W[d9];B[c3]
;W[b10];B[g10];W[g9];B[j8]
C[White could pass now (e.g. double threat i10 and g7).];W[g7];B[i9];
W[j4];B[i5];W[i4];B[f9];W[f8];B[d11];W[c10];B[a10];W[a11];B[g8];W[h6];
B[i6];W[k4];B[resign])(;B[f9]
C[Eric\:

This is still winning for Black, as I described earlier.];
W[e10]
C[Eric\:

The way I _spotted_ it was noting that if White just defends White's bridge, then blackG9 wins via https\://www.hexwiki.net/index.php/Edge_template_IV2b and a crescent.]
;B[g9]
C[Eric\:


_Figuring out whether F9 works_ required thinking like foiling, even though I still don't see any way of viewing \[the position just after blackF9\] as arising from foiling.

However, https\://hexworld.org/board/#6x7r9,b6c4b3a5d4d3f2d6e5 hopefully shows the similarities, viewing F7,F9,H8 as corresponding to F2,D4,E5 respectively.]
))(;AW[d10][e2][e3][e4][e5][e6][e8][f10][h6][i4][i6][i7][j3][j7][j8][k2]
[k8][k9][k10][k11]PL[B];B[f9]
C[Eric\:

F9 wins for Black.

The point is, 

template + semi-connection  =  3 semi-connections

and

3 semi-connections + 1 opponent's move  =  still connected,

so if White plays in the K11 direction or 11-edge direction from G9, then blackG9 connects F7 to the 11-edge.

This is _similar_ to how foiling works, although I can't think of any way of viewing \[the position just after blackF9\] as arising from foiling.]
))(;B[g8];W[g7];B[f8]C[Eric\:

This looks good for Black.];W[g9];B[h8];
W[h9];B[i8];W[i9];B[f9];W[e11];B[j7];W[f10];B[e10];W[d11];B[d10];W[c11];
B[b10];W[c10];B[c8];W[b9];B[c9];W[d9];B[d6];W[c7];B[d7]
C[Eric\:

If White insists on keeping Black's original group off the 11-edge, then Black can do this.]
))
