Can you tell whether Jacoby rule was enabled or not. You played without the cube: if Jacoby was still enabled the bot may not have been taking any account of gammon losses.
This might affect the overall numbers of gammons won and lost (since they don't count), but I would expect it to be the same for both sides. Unles there's something odd in the programming, such as the bot using it's own settings for itself, which respects Jacoby, but the quick finish for the human player doesn't use the Jacoby setting. -- Ian Shaw From: bug-gnubg-bounces+ian.shaw=riverauto.co...@gnu.org [mailto:bug-gnubg-bounces+ian.shaw=riverauto.co...@gnu.org] On Behalf Of Mrs Bibi e Bibo Sent: 30 April 2014 21:23 To: bug-gnubg@gnu.org Subject: [Bug-gnubg] bias in the probability to win a gammon? Hi, I did a simple experiment in which I let gnubg play against itself 1800 games in $ mode (unlimited) and without cube (actually, I played the first 20 games). This is an important point. The machine was set as computer against human, in settings>players and I had to click "end game" every single game. I noticed that the advantage of gnubg steadily increased. Intrigued, I did some statistical analysis and found a statistically significant difference in the probability of winning a gammon between gnubg and the human player. Apparently gnubg has a probability nearly 3% higher. I have attached a PDF file with my results. I find difficult to believe that gnubg cheats but I wanted to share with you these results, perhaps someone knows better. Thanks! FS _______________________________________________ Bug-gnubg mailing list Bug-gnubg@gnu.org https://lists.gnu.org/mailman/listinfo/bug-gnubg