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An interactive backgammon training website.

Posted By: Taper_Mike
Date: Thursday, 2 January 2014, at 8:35 a.m.

In Response To: An interactive backgammon training website. (Giorgos Tzampanakis)

Thanks. It's working great now.

Here is an example where Expert misses the mark. On your web site, I made the double hit.

The first rollout below is a 360-trial trunc that mimics XGR++. Next comes a 0-ply "Expert" eval of the same position.

Mike

The score (after 0 games) is: gnubg 1, Taper_Mike 4 (match to 5 points, post-Crawford play)

Move number 5: Taper_Mike to play 51

gnubg65

6X3X4X ' ' ' '1O2O ' '2O

 '1X2O2O2O2O1X2O ' ' ' '
Taper_Mike127
Position ID: v3sAQBBsm8FYAA Match ID: UYmmABAAIAAE

• Taper_Mike moves 8/7*/2*

# Ply Move Equity
• 1 R 8/7*/2* +0.748390
 
0.8989350.2914850.008517-0.1010650.0235500.000069 +0.748391 +0.748390
0.0006380.0015240.000495-0.0006380.0003310.000006 0.001504 0.001504
  
  Truncated cubeful rollout (depth 5) with var.redn.  
  360 games, Mersenne Twister dice gen. with seed 736772995 and quasi-random dice  
  Play: world class 2-ply cubeful prune [world class]  
  keep the first 0 0-ply moves and up to 8 more moves within equity 0.16  
  Skip pruning for 1-ply moves.  
  Cube: 2-ply cubeful prune [world class]  
  Different evaluations after 2 plies:  
  Play: 1-ply cubeful prune  
  keep the first 0 0-ply moves and up to 8 more moves within equity 0.16  
  Cube: 2-ply cubeful prune [world class]  
  2 R 13/7* +0.720361 ( -0.028029)
 
0.8810470.2454530.007854-0.1189530.0198620.000056 +0.720361 +0.720361
0.0010150.0014500.000251-0.0010150.0003920.000005 0.002222 0.002222
  
  Truncated cubeful rollout (depth 5) with var.redn.  
  360 games, Mersenne Twister dice gen. with seed 736772995 and quasi-random dice  
  Play: world class 2-ply cubeful prune [world class]  
  keep the first 0 0-ply moves and up to 8 more moves within equity 0.16  
  Skip pruning for 1-ply moves.  
  Cube: 2-ply cubeful prune [world class]  
  Different evaluations after 2 plies:  
  Play: 1-ply cubeful prune  
  keep the first 0 0-ply moves and up to 8 more moves within equity 0.16  
  Cube: 2-ply cubeful prune [world class]  

The score (after 0 games) is: gnubg 1, Taper_Mike 4 (match to 5 points, post-Crawford play)

Move number 5: Taper_Mike to play 51

gnubg65

6X3X4X ' ' ' '1O2O ' '2O

 '1X2O2O2O2O1X2O ' ' ' '
Taper_Mike127
Position ID: v3sAQBBsm8FYAA Match ID: UYmmABAAIAAE

• Taper_Mike moves 8/7*/2*

Alert: doubtful move ( -0.042)

# Ply Move Equity
  1 0 13/7* +0.722779
  0.887866 0.296848 0.007832 - 0.112134 0.025203 0.000000  
  0-ply cubeful prune [expert]  
• 2 0 8/7*/2* +0.680925 ( -0.041854)
  0.876501 0.324938 0.023857 - 0.123499 0.034305 0.000156  
  0-ply cubeful prune [expert]  

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