Forum Archive :
GNU Backgammon
Gnu versus Snowie and Jellyfish
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Snowie 3.2 and Gnu 1.2 were set up to play a session of 500 games
against each other. The bots played at there "best" settings --
3-ply for Snowie, 2-ply for GnuBG.
All positions from all the games were analyzed by both bots (and later
by Jellyfish and later versions of the original bots). It turned out
that in 626 positions one or more bots disagreed on the correct
checker play or cube action.
The 626 positions were rolled out using Snowie 3.2, or sometimes
Snowie 4 for trickier positions, and statistics gathered on how well
each bot performed compared with the rollout results. The following
table shows the total cost of the errors by each bot. The number of
positions each bot got wrong is shown in parentheses.
Overall Checker Errors Cube Errors
------------ -------------- -----------
Gnu14 11.009 (193) 8.175 (159) 2.834 (34)
Gnu13 11.905 (204) 8.949 (170) 2.956 (34)
SW4 12.531 (200) 8.744 (163) 3.787 (37)
Gnu12 14.530 (229) 10.571 (180) 3.959 (49)
SW3 20.256 (286) 14.292 (226) 5.964 (60)
JF 28.674 (371) 20.109 (293) 8.565 (78)
Cube Errors by Type of Error
-----------------------------------------------------
Missed Wrong Wrong Wrong
Double Double Take Pass
---------- ---------- ---------- ---------
Gnu14 0.728 (10) 0.323 (4) 1.392 (17) 0.391 (3)
Gnu13 0.728 (10) 0.342 (4) 1.631 (18) 0.255 (2)
SW4 1.030 (14) 0.862 (4) 1.530 (16) 0.365 (3)
Gnu12 0.964 (12) 0.960 (15) 1.344 (15) 0.691 (7)
SW3 2.092 (24) 0.404 (5) 2.613 (26) 0.855 (5)
JF 2.602 (32) 1.074 (14) 4.291 (30) 0.598 (2)
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GNU Backgammon
- Analyzing GamesGrid matches (Roy Passfield, Dec 2001)
- Batch analysis tool (Øystein Johansen, June 2004)
- Cache size (Ned Cross+, Mar 2004)
- Compiling for Windows (Øystein Johansen, Jan 2002)
- Edit mode removing checker from bar (Scott Steiner+, May 2003)
- Entering an annotated match (Albert Silver, Dec 2003)
- Error rates: Gnu vs. Snowie (Raccoon, Mar 2006)
- Even-ply/odd-ply effect (Raccoon, Nov 2004)
- Even-ply/odd-ply effect (Tom Keith+, Oct 2003)
- Even-ply/odd-ply effect (Scott Steiner+, Dec 2002)
- Filter settings (Robert-Jan Veldhuizen, Nov 2004)
- Gnu 0.13 versus Jellyfish and Snowie (Torsten Schoop, Aug 2003)
- Gnu 0.13 vs. Snowie 4 (Albert Silver, June 2003)
- Gnu 0.14 vs. Jellyfish (Michael Howard+, July 2003)
- Gnu versus Snowie and Jellyfish (Michael Depreli, Oct 2005)
- How luck factor is calculated (Gregg Cattanach, Aug 2002)
- How rollouts work (Gary Wong, July 1999)
- How to enter an illegal move (Øystein Johansen, Aug 2003)
- Importing .gam files (PAR+, Mar 2005)
- Importing PartyGammon matches (rew+, July 2006)
- Improving your game using GnuBG (D.U.G.+, Nov 2002)
- Installing on Windows (maareyes, Oct 2001)
- Interpreting JSD's (Adrian Wright+, Feb 2005)
- JSD's and confidence intervals (Daniel Murphy+, Jan 2005)
- Logging rollouts (Øystein Johansen, Oct 2004)
- Luck rate (Kees van den Doel+, May 2002)
- MWC versus Equity (EMG) (Ken+, Apr 2005)
- Manually entering first roll (Andreas Graf+, Apr 2005)
- Match equity tables (Raccoon, July 2005)
- Personal reflections (Louis Nardy Pillards, Sept 2002)
- Playing two computers against each other (Stanley E. Richards+, Mar 2008)
- Python scripting (Øystein Johansen+, Nov 2004)
- Quasi-random dice in rollouts (Ian Shaw, Mar 2004)
- Question marks in game list (Jim Segrave, July 2005)
- Questions and answers (Jim Segrave+, Jan 2003)
- Questions and answers (Jørn Thyssen, Aug 2002)
- Restarting a rollout with different settings (Jim Segrave, Apr 2005)
- Restarting a rollout with different settings (Robert-Jan Veldhuizen, Apr 2004)
- Rollout settings (geoff arnold+, Apr 2007)
- Rollout settings (Stick+, Nov 2005)
- Rollout settings (Robert-Jan Veldhuizen, Mar 2004)
- Rollout settings (Ian Dunstan, Aug 2003)
- Rollout settings for the impatient (Robert-Jan Veldhuizen, June 2004)
- Running rollouts in background (Bruce+, Apr 2004)
- Saving rollout results from command-line interface (Jeremy Bagai+, Apr 2006)
- Saving rollouts (Mislav Radica+, May 2006)
- Setting GnuBG's playing strength (JP White, Sept 2001)
- Setting skill level (Jim Segrave, Apr 2004)
- Setting up and saving a rollout (Albert Silver, Dec 2003)
- What's GNU? (Gary Wong, Oct 2001)
- Which player is player 0? (Neil Kazaross+, Oct 2004)
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