(;AP[HexGui:0.10.GIT]
C[2021/01/07

Black\: Frank
White\: Peter

White wins.]FF[4]GM[11]PL[B]
SZ[11];B[j10];W[f6];B[d5];W[d4]
C[Peter\: With hindsight, I didn't like the outcome of this joseki, and should have perhaps played d3.]
;B[c5];W[c3]C[This is to avoid Black getting b6.];B[b4];W[b3];B[c4];
W[d3];B[e4](;W[g3]
C[Eric\: Incorrect. See next variation for the rest of the joseki.];
B[f2];W[d8](;B[c7]
C[Peter\: I was more concerned about c8, see next variation.];W[d9];
B[b8]C[Bad.];W[d10];B[e7];W[g8](;B[g7];W[g9];B[j7];W[i8];B[resign])(;
B[i7]C[Variation. According to Mohex, h6 wins for White.];W[h6];B[e9];
W[g9];B[e10];W[e8];B[f8];W[f7];B[g7];W[h5]))(;B[c8]
C[Peter\: This is the move I was more concerned about.](;W[c7]
C[Eric\: White can do c9 instead, see next variation.](;B[e6]
C[Eric\: Black should foil, see next variation.];W[d9];B[e7];W[f8];B[h7]
;W[h6];B[g7];W[f7];B[g6];W[g5];B[i4];W[h5];B[j5];W[i6];B[j6];W[i8];B[i7]
;W[g9])(;B[b8]
C[Eric\:


Black should foil.

(In fact, due to C8 and the D5 wall, one can _prove_ that the C7-B8 exchange does not help White.)]
))(;W[c9]C[Eric\:

White can do this instead.];B[a10];W[c10];B[a11];
W[b7];B[b9];W[d6])))(;W[f2]C[Eric\:

This is the rest of the joseki,];
B[g3];W[i2];B[h1];W[f4];B[f3];W[d8]
C[Eric\:

and this is White's move after it.]))
