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42P-54S-43K-21-32@-51H-62U-54T-31

Posted By: Taper_Mike
Date: Wednesday, 19 March 2014, at 7:36 p.m.

In Response To: 42P-54S-43K-21-32@-51H-62U-54T-31 (Nack Ballard)

Although Nack’s choice of W in this position for 18/15 6/5 conforms perfectly to the definition of Wild in the Nactation Tutorial, I have switched it to the equally acceptable E (Each) in the nacbracs below. That’s because 18/15 6/5 was not wild enough for me! In fact, leaving a blot on the 18pt seems “wilder” than advancing it.

Another reason for my choice is that I generally reserve W for plays that split a rear checker into the same region used by U (i.e., between the 18pt and 24pt). This is not required at all by the Nactation Tutorial, which allows a split to any point on the far side of the board. It only reflects my interpretation which tries to align W with a more traditional “splot” (split-and-slot). When, however, an advanced anchor is broken in order to split a checker out to the outer board against contact (in conjunction with a slot), then I will use W. That certainly fits my definition of wild.

For the bot codes, I have added an apostrophe to indicate version 1.xx of GnuBg. This is important because without it, the nacbracs should be taken to be for GnuBg version 0.xx, which uses much weaker neural nets. I have also been more precise in the trial counts, using 0.360t instead of .3t. Either one is fine. I use the former because it keys me to understand that the trunc is my clone of XGR++. My use of the leading 0. dates back all the way to Niklaus Wirth and Pascal!

Below is a no-Jacoby/no-beavers trunc where it is interesting to note that D = 13/9 slips ahead of E = 18/15 6/5 to claim second place.

Finally, I am including a trunc of the 62 play from this sequence. I found it interesting enough to include in my set of “slot-either-bar-point” positions. In this rollout, slotting the 7pt wins out.

Mike

Unlimited Games, No Jacoby, No Beavers


 '1O2O ' '5X1O5X ' ' '5O

1X ' '2O '4O ' ' ' ' '4X
42P-54S-43K-21-32@-51H-62U-54T-31
Position ID: 4PPBAyCYB3wQFg Match ID: cIkFAAAAAAAE

# Ply Move Equity
• 1 R 13/10 6/5 -0.290909
 
0.4523230.1106420.003508-0.5476770.2139930.011885 -0.207083 -0.290909
0.0011050.0005320.000075-0.0011050.0012330.000204 0.002894 0.004516
  
  Truncated cubeful rollout (depth 5) with var.redn.  
  360 games, Mersenne Twister dice gen. with seed 705145359 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 13/9 -0.305822 ( -0.014914)
 
0.4320200.1099650.002821-0.5679800.1796100.007219 -0.210003 -0.305822
0.0009330.0005780.000073-0.0009330.0011890.000136 0.002445 0.003769
  
  Truncated cubeful rollout (depth 5) with var.redn.  
  360 games, Mersenne Twister dice gen. with seed 705145359 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]  
  3 R 18/15 6/5 -0.306273 ( -0.015364)
 
0.4428730.1076930.003266-0.5571270.2024770.009495 -0.215267 -0.306273
0.0008760.0005050.000064-0.0008760.0013590.000189 0.002532 0.003878
  
  Truncated cubeful rollout (depth 5) with var.redn.  
  360 games, Mersenne Twister dice gen. with seed 705145359 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]  


Annotation
Truncated Rollout by Taper_Mike
2014-Mar-19
GNU Backgammon 1.02.000-mingw
42P-54S-43K-21-32@-51H-62U-54T-31-n-tm . sgf
n[$ D15 E15] '/0.360t

42P-54S-43K-21-32@-51H-62U-54T-31 — Unlimited Games
Bot Seed Equity Nacbracs Link
GnuBg 1.02 2-ply Trunc 705145359 –275.600 [$ E20 D22] '/0.360t Taper_Mike
GnuBg 1.02 2-ply Trunc 705145359 –290.909 n[$ D15 E15] '/0.360t Taper_Mike (above)

42P-54S-43K-21-32@-51H-62U-54T-31 — Double Match Point
Bot Seed Equity Nacbracs Link
GnuBg 1.02 2-ply Trunc, MET: Rockwell-Kazaross 705145359 –95.231 d[$ E19 D39] '/0.360t Taper_Mike

42P-54S-43K-21-32@-51H-62U-54T-31 — Gammon Go
Bot Seed Equity Nacbracs Link
GnuBg 1.02 2-ply Trunc, MET: Rockwell-Kazaross 705145359 +130.306 g[$ E29 D43] '/0.360t Taper_Mike

42P-54S-43K-21-32@-51H-62U-54T-31 — Gammon Save
Bot Seed Equity Nacbracs Link
GnuBg 1.02 2-ply Trunc, MET: Rockwell-Kazaross 705145359 –498.162 s[D R2 Z5 r12 @20 E21 $25] '/0.360t Taper_Mike

Key: @ = Anchor [22/18], $ = Slot [13/10, 6/5], D = Down [13/9], E = Each = W = Wild [18/15, 6/5], R = Run [18/14],
r = run [23/22, 18/15], Z = Reverse split [23/22, 13/10]

Nactation Tutorial • Explanation of nacbracs • Nacbracs for cube actions

42P-54S-43K-21-32@-51H-62

Unlimited Games, No Jacoby, No Beavers


1O '2O ' '5X '4X ' ' '5O

1X ' '2O '4O '1X ' ' '4X
42P-54S-43K-21-32@-51H-62
Position ID: 4PPgISCYB3wAUw Match ID: cAkLAAAAAAAE

Alert: doubtful move ( -0.030)

# Ply Move Equity
  1 R bar/23 13/7 -0.267900
 
0.4420910.1187380.003833-0.5579090.1844370.009070 -0.186754 -0.267900
0.0007110.0005330.000068-0.0007110.0009040.000170 0.001745 0.002834
  
  Truncated cubeful rollout (depth 5) with var.redn.  
  360 games, Mersenne Twister dice gen. with seed 705145359 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 bar/23 24/18 -0.298072 ( -0.030172)
 
0.4343900.1115870.003402-0.5656100.1821230.007167 -0.205521 -0.298072
0.0007280.0005680.000067-0.0007280.0013420.000159 0.001674 0.002764
  
  Truncated cubeful rollout (depth 5) with var.redn.  
  360 games, Mersenne Twister dice gen. with seed 705145359 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]  


Annotation
Truncated Rollout by Taper_Mike
2014-Mar-19
GNU Backgammon 1.02.000-mingw
42P-54S-43K-21-32@-51H-62U-54T-31-n-tm . sgf
n[$ U30] '/0.360t

42P-54S-43K-21-32@-51H-62 — Unlimited Games
Bot Seed Equity Nacbracs Link
GnuBg 1.02 2-ply Trunc 705145359 –267.900 n[$ U30] '/0.360t Taper_Mike (above)
XG 2.10 XGR++ Eval [XGR++ seed] –273.3 n[$ U25] "&e Taper_Mike

Key: $ = Slot [bar/23, 13/7], U = Up [bar/23, 24/18]

Nactation Tutorial • Explanation of nacbracs • Nacbracs for cube actions

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