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52S-21 — Gammon Go — 2-ply GnuBg Rollout & Question

Posted By: Taper_Mike
Date: Tuesday, 24 July 2012, at 4:36 a.m.

In Response To: Slotting with 52S-21 (Nack Ballard)

The score (after 0 games) is: gnubg 2, user 1 (match to 3 points, Crawford game)

Move number 2: user to play 12

gnubg160

2O ' ' ' '5X '4X ' ' '5O

1X '1X ' '5O '3O ' ' '4X
user167
Position ID: 4PPgASTgc/ABMA Match ID: 8IloACAACAAE

# Ply Move Equity
  1 R 13/11 6/5 +0.203907
 
0.4725940.1293590.016513-0.5274060.2762040.073293 +0.203907 +0.203907
0.0009000.0006670.000746-0.0009000.0021060.001624 0.002399 0.002399
 
  Full cubeful rollout with var.redn.  
  15552 games, Mersenne Twister dice gen. with seed 815774911 and quasi-random dice  
  Play: 2-ply cubeful prune [world class]  
  keep the first 0 0-ply moves and up to 12 more moves within equity 0.16  
  Skip pruning for 1-ply moves.  
  Cube: 2-ply cubeful prune [world class]  
2 R 6/3* +0.202301 ( -0.001606)
 
0.4730280.1281220.015435-0.5269720.2559690.059524 +0.202301 +0.202301
0.0008810.0006380.000695-0.0008810.0020720.001460 0.002278 0.002278
 
  Full cubeful rollout with var.redn.  
  15552 games, Mersenne Twister dice gen. with seed 815774911 and quasi-random dice  
  Play: 2-ply cubeful prune [world class]  
  keep the first 0 0-ply moves and up to 12 more moves within equity 0.16  
  Skip pruning for 1-ply moves.  
  Cube: 2-ply cubeful prune [world class]  
  3 R 24/23 13/11 +0.185217 ( -0.018690)
 
0.4730560.1195530.011187-0.5269440.2323220.041750 +0.185217 +0.185217
0.0011940.0009900.000929-0.0011940.0033930.001962 0.003108 0.003108
 
  Full cubeful rollout with var.redn.  
  5184 games, Mersenne Twister dice gen. with seed 815774911 and quasi-random dice  
  Play: 2-ply cubeful prune [world class]  
  keep the first 0 0-ply moves and up to 12 more moves within equity 0.16  
  Skip pruning for 1-ply moves.  
  Cube: 2-ply cubeful prune [world class]  

Rollout by Stick

52S-21 — Gammon Go
Bot Seed Equity Nacbracs Link
GnuBg 2-ply [Not posted] [Not posted] g[$ H2 S19] /15 BGO Msg. No. 119644
GnuBg 2-ply [Not posted] [Not posted] g[$ H1.6] /15 BGO Msg. No. 56108

This is one of those interesting replies where it is competitive to slot into a double shot. Even so, it is worth noting that Nack states a preference for H = Hit (6/3*) in BGO Msg. No. 56108.

The two nacbracs above seem to be referring to the foregoing rollout by Stick. If so, then the first of them contains an error. The trial counts should be 15*5. The second is fine, but omits the third-place play.

Of course, it is also possible that Stick’s rollout has been extended since the time the one here was made. If that is the case, then the first report may also be correct.

Can anyone shed light on this? As always, the only reason I ask such a picky question is so that the data I am transcribing into my database are accurate. Thanks.

Mike

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