| format | 15-round Swiss |
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| board size | 19×19 |
| rules | Chinese |
| komi | 7½ |
| time | 14 minutes plus 10/30s |
The first round started at 08:00 UTC.
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Eight players initially entered. Then gomorra3 withdrew, as it has a bug which sometimes causes it to hang and refuse to make any more moves. I persuaded its programmer, Lars Schäfers, to re-enter it, as this would make the numbers even, which is better than having byes.
Shortly before play started, Petr Baudiš decided to enter PueGo (his build of Fuego, not the latest version), so I removed gomorra3 again.
In round 1, oakfoam was missing. I learned later that its programmer, Francois van Niekerk, was having connection problems. Oakfoam eventually appeared on KGS, and played from round 4 onwards.
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| PueGo vs Zen19 |
| Moves 43-49 |
In round 2, PueGo appeared to do well against Zen19, in the sequence
shown to the right – my impression was that this killed the white group.
But there is a ko involved, and the white group eventually lived despite Black
making the next two moves in this corner, so I am probably wrong.
Also in round 2, stv chased pachi2's stones in a ladder,
not noticing that pachi2 had a ladder-breaker. This was disastrous for stv, and
it lost the game.
In round 6, PueGo chased pachi2's stones in a ladder, not noticing that pachi2 had a ladder-breaker. This was disastrous for PueGo, and it lost the game.
In round 8, pachi2 chased oakfoam's stones in a simple unbroken ladder, killing them when it reached the edge of the board. This was disastrous for oakfoam, and it lost the game.
In round 12, stv chased Zen19's stones in a ladder, not noticing that Zen19 had a ladder-breaker. This was disastrous for stv, and it lost the game.
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| Zen19 vs PueGo |
| Move 27 |
In round 14, PueGo played move 27 as shown to the left, in its game against Zen19. I found this surprising: pulling out its cutting stones, in sente, looks better.
Players receive points for the 2011 Annual KGS Bot Championship as follows:
| Zen | 8 |
| pachi | 5 |
| Fuego | 2 |
| Steenvreter | 2 |
| Aya | 2 |