(;AP[HexGui:0.10.GIT]
C[2020/08/28

Black\: Frank
White\: Peter

White wins.

Commentary by Eric (paraphrased).]
FF[4]GM[11]SZ[11];B[a2];W[d8];B[f6];W[g8];B[e8]
C[Black should have probably played the Joseki first, i.e., intrude into the corner at i8 (low intrusion) or h8 (high intrusion). Given that White already has d8, I would recomment the high intrusion.]
;W[e7];B[f7];W[f5]
C[Black could try j4 or h4. White tries f9.

See next variations.](;
B[g5];W[h3];B[g4];W[g3];B[j2];W[i4];B[i3];W[h4];B[e4];W[d3](;B[e3]
C[This move was dominated by f2, which would have therefore been better. e3 leaves an intrusion point for White at e2, which Black must respond to. 

It may not make a difference in this situation (due to a2), but in general, it can. 

For example, if a2 wasn't occupied, d3 and e2 together form an edge template and a 4th row ladder escape (whereas d3 alone only provides a 3rd row ladder escape).

Another option would have been c5. See next variation.]
;W[f4];B[d6](;W[b10]
C[Here, White would have had an easy win by just playing e6. See next variation.]
;B[e6];W[e9]C[This looks quite good for White.];B[f9];W[e10];B[h9](;
W[h10];B[i9];W[f8]
C[White is now connected by template a5-19 (from David King's website).]
;B[h7];W[h8];B[j7];W[h6]
C[What White played here is basically the a3 escape trick. The fact that the 3rd row ladder originates from h8 rather than k8 is immaterial. The fact that h7 is already occupied by Black is compensated by White occupying g8.]
;B[j5];W[j6];B[i7];W[g7];B[i5];W[h5];B[c10];W[d9];B[resign])(;W[i9]
C[i9 variation\: this is an easier win for White.];B[i8];W[i7];B[f8];
W[f10];B[j7];W[g9];B[j6];W[h6];B[i5];W[j5];B[i6];W[h5]))(;W[e6]
C[e6 variation. White gets a 2nd row ladder which connects via switchback.]
;B[c8];W[c9];B[a10];W[b9];B[a9];W[b8];B[a8];W[b7];B[a7];W[b6];B[a6];
W[b4];B[b5];W[d4];B[c5];W[d5]))(;B[c5]
C[c5 variation. This intrudes into d3's edge template. It also threatens b4, which would give Black a 2nd row ladder (which is sufficient to connect in this case). ]
;W[b4];B[f2]
C[White gets a 2nd row ladder escape, Black gets a connection to the 1-edge.]
))(;B[h4]
C[h4 variation.

Here Black is already connected to the 1-edge due to a2. Apart from template intrusions, White is force to play the ladder at g5.]
;W[g5];B[h5];W[g6];B[h6];W[f9]
C[At this point, rather than continuing the ladder (which would allow Black to hold White to a 3rd row ladder), White is better off playing f9, which invades e8's template and takes away Black's 2nd and 3rd row ladder escapes along the 11-edge.]
;B[i7];W[h9];B[i9];W[i8];B[k7]
C[This situation is pretty good for White. k7 and j9 only give Black a 2nd row ladder on the 11-edge, which e8 does not escape.
]
;W[e10]
C[Now White could try this, blocking Black's ladder and creating the double threat of d9 and g7.]
;B[j10]
C[Now if Black connects the corner, White gets a 2nd row ladder along the K-edge.

Now Black would love to have done the j4-j3 exchange earlier in the game. (See the j4 variation at move 9).]
)(;B[j4]
C[j4 variation.

Given the analysis of h4 I gave in the previous variation, which ends up being good for White, I now prefer j4.]
;W[j3]
C[This is the only way for White to keep j4 off the 1-edge, given a2.

White may not actually want to play this move right away. But let's assume White does.]
;B[h4]C[Then we continue similarly to the previous variation.];W[g5];
B[h5];W[g6];B[h6];W[f9];B[i7];W[h9];B[i9];W[i8];B[k7];W[j8];B[k8];W[j10]
;B[j9];W[h11];B[h10];W[g11];B[g10];W[f11];B[f10];W[e11];B[d10];W[e10];
B[g7]))
