(;AP[HexGui:0.10.GIT]
C[2021/11/05

Black\: Sarah
White\: Frank

Handicap\: 0.5

White wins.]
FF[4]GM[11]PL[B]SZ[11];B[f6];W[d9];B[f8];W[d8];B[g6];W[g7];B[f7]
C[Eric\: E7 is strictly better.  (It captures F7 and E8.)];W[f9];B[e9];
W[d11](;B[e10]
C[Eric\:

I would play B10 (variation), since Black has enough room for Tom's move in the K11 corner.]
;W[e11];B[f10];W[f11](;B[g10]
C[Eric\:

Black should either cap this flank with H5 (https\://www.hexwiki.net/index.php/Flank) and then play along the A-edge, starting with B10 (variation), or play B10 and then climb along this flank (other variation).]
;W[g11];B[i10];W[h10];B[i9];W[h9];B[i7];W[i8];B[k7](;W[h4]
C[Eric\:

G7 means a switchback would connect, so White should keep pushing (see variation).]
;B[j6];W[h3];B[g4];W[f5];B[g5];W[g3];B[f4];W[f3];B[d4];W[e4];B[d6];W[d5]
;B[b6]
C[Eric\:

Now White wins even if it's Black's turn again.  (C3 or C6, since D7 is available)]
;W[c6];B[k2];W[j2];B[k1];W[j4];B[resign])(;W[j7];B[k6];W[j6];B[k5];W[j5]
;B[k4];W[j4];B[k3];W[j2];B[j3];W[h3];B[d5];W[h4];B[i4];W[h5];B[i5];W[h6]
))(;B[h5]C[Eric\:

capping this flank](;B[h10]C[Black's threat];W[g10];
B[h9];W[g9];B[h8];W[g8];B[i6])(;W[h10];B[g10];W[g11];B[b10];W[d10];B[c8]
))(;B[b10];W[d10];B[h10];W[g10];B[h9];W[g9];B[h8];W[g8];B[i6]
C[Eric\:

climbing along this flank]))(;B[b10];W[d10];B[h9];W[g10];B[i8]
;W[g9];B[h7]))
