(;AP[HexGui:0.10.GIT]
C[2020/04/24

Black\: Frank
White\: Peter

Handicap\: N/S

White wins.

Commentary by Eric.]
FF[4]GM[11]SZ[11];B[i3]
C[This might be an attempt at playing with swap, which is why I'm mentioning that, with swap, this is way too useful.]
;W[f7];B[d8];W[d6];B[e6];W[d9]
C[6. d9  or  8. b11

I think one of these should've been at d7.  Probably White's 8.

On the other hand, when I initially went through this, I was thinking White could do that whenever, and I didn't realize it was getting to be too late until I was already at move 32. For that reason, I _might_ have missed playing it if I was White.]
;B[c9];W[b11]
C[Right now, White's d6 is enough to escape White's b11, so b11 is connected to the a-edge. ]
;B[c10]
C[I think Black should've played b9 instead, since Black can connect to the 11-edge with Tom's move.

https\://www.hexwiki.net/index.php/Tom%27s_move

http\://www.trmph.com/hex/board#11,i3f7d8d6e6d9c9b11e8e9f8f9h9g10i8

b9 would give Black more strength toward the top before Black does that.]
;W[c11];B[e9];W[e10];B[h9];W[h8]
C[This lets Black connect to the 11-edge with b9 or f9. I think White should've played f9 or g9 instead.  Probably g9.
]
;B[g9]
C[This does extremely little, since h9 already had a template to the 11-edge. b9 or f9 would've connected Black's main group to the 11 edge. I think f9 would've been better than b9, since h5 would threaten to connect to it.

\[Note\: For this explanation to make sense, consider that if Black played at b9, it wouldn't be in White's best interest to respond by playing near the a-11 corner, since Black's group is connected to the 11-edge one way or the other. So if Black plays b9, White will play elsewhere, depriving Black of the opportunity to play f9\]]
;W[f11];B[g8]
C[j9 would've captured the corner, making White's move at f11 completely useless. That exchange would also have stopped h8 from being an escape piece for ladders along the k-edge.
]
;W[h10];B[j9];W[i9];B[k7]
C[Good.  I was wondering whether Black would know to yield.  \:-)];W[j7]
C[22. j7  and  24. j6

I would play j8, since it's not _guaranteed_ that White's lower-right group will connect to the a-edge. (Black has moves near the bottom corner that threaten to cut the group off from the a-edge and also do something else useful.)

Peter\: as I understand this comment, White should have played at j8, forcing Black to play at k8, because this would have connected h8 to the group, giving White more strength going forward.]
;B[k6];W[j6];B[k5];W[j4];B[j5];W[i5];B[i6];W[h7];B[h6];W[h5]
C[After this move, I can prove that White loses, although I would not have been sure of that in real time.

As White, I would've begun with j8, and then I think I would've played \[h4 or maybe h3 or h2\] instead of h5.

(I'm far from confident that beginning with j8 would not make things worse, since it would let Black play b9 to reconnect down.)]
;B[g6];W[g4];B[e5]
C[f4 was a simple win.  Black's e6 connects to the 11-edge via f6 or g7, and connects to the 1-edge via a bridge to the standard fourth row template.

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

https\://www.hexwiki.net/index.php/Defending_against_intrusions_in_template_1-IVa]
;W[e4]C[Good.];B[f4];W[g2]
C[I consider that obvious enough that I wouldn't comment just to to approve of it, but since I'm commenting here anyway and the rest of my comment here might seem disapproving of this move, I'm mentioning that this move is fine.

Anyway, after it, the top corner is settled (settled as, g2 connects to the k-edge and Black's groups connect to each other),  so White's potential j8 no longer matters and White playing d7 would no longer threaten to cut through anything towards the right.

(Black's c9 group connects via e7 or g7.)]
;B[g3];W[h2];B[h3];W[j1];B[d5];W[d4]
C[I feel that d3 was winning for White.  After  44. d4,  Black wins.];
B[d3]
C[Now White wins.  c3 was winning for Black, since due to Black's d5, White's d6 is not enough to escape height-3 ladders along the a-edge.

(As I mentioned under 38, White playing j8 would not threaten anything towards the right.)
]
;W[c3]
C[Now Black wins.  f2 was winning for White, since it gives White a ladder escape fork at c2.]
;B[c4];W[f2];B[c5];W[e1];B[d2];W[d1];B[c2];W[c1];B[a2];W[b2];B[a3];W[d7]
C[Good, since White needed to hope Black falls for this.
];B[e7]
C[Black fell for it.  Even without Black responding here, e6 connects to g6 via the top, and d8 connects to that group via e7 or g7.
Since Black fell for it, White is now winning.
(Black playing b3 instead would've kept the win.)

White kept the win the whole way after this.]
;W[b3];B[a4];W[b4];B[a5];W[b5];B[a6];W[b6];B[a7];W[b8];B[resign])
