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Two small corrections

Posted By: Taper_Mike
Date: Friday, 11 December 2015, at 10:05 p.m.

In Response To: What was White's last move? – How To Solve Retro Puzzles (Taper_Mike)

The first correction entails adding the clause, ", while splitting the back checkers." It occurs at the end of my third paragraph. The change is highlight below.

Since each player only gets three moves, I made the assumption that most moves took checkers to their final destinations. On the opening roll, in particular, I assumed that White played either 32S = 24/21 13/11 or 62S = 24/18 13/11. Having done a few of these retro puzzle before, I knew that those are the only perfectly played opening moves that put a checker on the 11pt, while splitting the back checkers.

The second correction requires that 51S-41 be changed to 52S-41. It occurs just above the eighth board diagram. The change is highlight below.

In short order, I cooked up a solution: 31P-51S-32S-63H-43@-F-C. I was just about to write that one up, when I discovered a problem with the 32S on the third roll. 31P-51S-32 is an early position that reminds me of 52S-41. The best play is the beginner’s safe play! Once again, I was learning about early-game play as I tried to solve a retro puzzle.

 White is Player 2 score: 0 pip: 163 Unlimited GameJacoby Beaver pip: 161 score: 0 Blue is Player 1
XGID=-b----E-D---eD---b-db--AA-:0:0:-1:32:0:0:3:0:10
White to play 32

1.XG Roller++13/8eq: +0.2428
 Player:Opponent: 55.30% (G:16.92% B:0.62%)44.70% (G:11.39% B:0.53%)
2.XG Roller++24/21 13/11eq: +0.2296 (-0.0132)
 Player:Opponent: 55.34% (G:15.61% B:0.63%)44.66% (G:11.15% B:0.44%)
3.XG Roller++24/22 13/10eq: +0.2145 (-0.0283)
 Player:Opponent: 55.02% (G:16.04% B:0.67%)44.98% (G:12.08% B:0.47%)
4.XG Roller++13/11 13/10eq: +0.2032 (-0.0396)
 Player:Opponent: 54.61% (G:17.12% B:0.72%)45.39% (G:12.44% B:0.69%)

eXtreme Gammon Version: 2.10

Mike

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