| format | 20-round Swiss |
|---|---|
| board size | 19×19 |
| rules | Chinese |
| komi | 7½ |
| time | Three hours each, sudden death |
The first round started at 22:00 UTC on the evening of Sunday 22nd.
Shortly before the start of play, there were seven players registered. I then received an email from Detlef Schmicker, asking to register his program 'dbot'. He did not persuade me that it was strong enough to enter (the criterion is "have beaten SimpleBot"). However I considered it better to have dbot playing than to have byes, and allowed it to enter.
Thus eight players registered. All played all their games.
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| ManyFaces1 vs AyaMC |
| Moves 213-218. |
In round 7, CzechBot beat Zen19S. This was Zen19S's first loss.
In round 9, pachi2 beat Zen19S. This was Zen19S's only other loss.
Also in round 9, there was an interesting game between AyaMC and ManyFaces1, involving a semeai at the lower left side of the board, as shown to the right. This is a semeai in which White has a big eye and Black a small eye, so Black should win.
However, after move 270, with the position in the lower left unchanged, AyaMC resigned as Black. It had failed to realise that it can capture the 23-stone white group. If it had captured it, it would have won the game.
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| pachi2 vs AyaMC |
| Moves 109-111. |
In round 12, pachi2 appeared to misread a snapback against AyaMC, as shown to the left. Its move 10 captures three stones, but fails to prevent Black's D7 and D8 stones from connecting to its right-side group.
The players receive points for the 2011 Annual KGS Bot Championship as follows:
| Zen | 8 |
| pachi | 5 |
| Many Faces of Go | 3 |
| Aya | 2 |
| StoneGrid | 1 |