On 1/1/07, David Fotland <[EMAIL PROTECTED]> wrote:
In your paper you show win rates against GnuGo of about 50%, depending on the parameters. The current Mogo beats GnuGo over 90%. What changed? Are you doing more simulations, or do you have more go knowledge in your patterns? Does Mogo have an opening book?
I spent most of yesterday on KGS playtesting MoGo on 9x9 with 30 min total thinking time. The experience was quite unlike any other program I've played on 9x9 in the past. As I wrote to Sylvain in a private email: " I had a lot of fun playing MoGo today. In the first game, it played some nonsensical moves and I got a totally won position, but MoGo turned out to be very inventive and led me into a trap:( That was not the last game I was to lose to MoGo. I found it much more challenging than any other program I played. It is quite resourceful. And in one game you'll see it play a beautiful tesuji. This really makes me feel like it's only a matter of time till MC programs can challenge professionals on 9x9." I enclose 2 of the games I played. In the first, MoGo is quite enterprising in the opening, with moves like e6. It would be very hard for an evaluation function to appreciate the potential w has for territory after black c8. But MoGo correctly assesses that w will control the right half of the board. Furthermore, it very nicely punishes blacks mistake of playing f5 prematurely with a beautiful tesuji at d3. In the other game, Mogo plays a different atari on the 6th move, leading to a very different game. It shows good timing in playing b7 when the right group can fend for itself and plays a nice probe at e3 to determine its followup. Apparently it sees that g2 is sente on the d2 group, preventing black from a killing attempt at h5. It makes a mistakeat move 30 with f7 though. Playing a4 c4 a2 b3 a3 d4 a6 b3 e8 instead would have given it a win. Later testing with MoGo showed that it indeed was unlucky to choose f7, and prefers e8 with a bit more search. I feel that the shodan level go 9x9 programs have arrived... regards, -John
MoGoBot-tromp-3.sgf
Description: application/go-sgf
MoGoBot-tromp-9.sgf
Description: application/go-sgf
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