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42P-51S-52S-55A-F-C – A Perfect Reference Position
Posted By: Nack Ballard In Response To: 42P-51S-52S-55A-F-C – A Perfect Reference Position (Taper_Mike)
Date: Sunday, 1 June 2014, at 5:14 a.m.
White is Player 2
score: 0
pip: 158Unlimited Game
Jacoby Beaverpip: 141
score: 0
Blue is Player 1XGID=bB-B--C-B---dD---c-d-b-AA-:0:0:1:00:0:0:3:0:10 42P-51S-52S-55A-F-C [D 1000–212] "<=164
Analyzed in Rollout No double Double/Take Player Winning Chances: 65.045% (G:39.768% B:0.440%) 65.555% (G:42.074% B:0.474%) Opponent Winning Chances: 34.955% (G:9.066% B:0.521%) 34.445% (G:9.550% B:0.600%) Cubeless Equities +0.6071 +1.2701 Cubeful Equities No double: +0.7882 (-0.2118) ±0.0011 (+0.7871..+0.7894) Double/Take: +1.0000 ±0.0016 (+0.9984..+1.0016) Double/Pass: +1.0000 (+0.0000) Best Cube action: Double / Take Rollout details 164600 Games rolled with Variance Reduction.
Dice Seed: 85570326
Moves: 3-ply, cube decisions: XG RollerDouble Decision confidence: 100.0% Take Decision confidence: 50.0% Duration: 1 day 07 hours 37 minutes The nearest multiple of 1296 that is less than 164,600 is 164,592, a difference of only 8. A suspicious reader such as myself might suppose that Nack began with the exact multiple, and then added just enough trials to turn the take/pass decision into a perfect tie.
I should have known you'd be paying attention. :)
Actually, once I got close to four zeros, I added two trials at a time, in order to get an even number (making it less likely to be instantly busted as a non-1296-multiple).
I may well have missed something earlier, but from the time that I started watching closely, the first quad-zero that was also 50.0% (i.e., not 50.1 or 50.2) came at 161786, and was also there at 161794, 161796 and 161798. It came back to quad-zero 50.0% after a few hundred and I almost settled for the repeater-number 162222, but subsequently, by trying only multiples of 100 and 1296, eventually found 164600. (The 1296-multiple of 164592 was a quad-zero but at the imperfect 50.1%, as I recall.)
I never did find a 1296-multiple that coincided with quad-zero 50.0%. Then again, I never expected to get as lucky as I did.
There's always different seed numbers, if you want to try. I'm sure that ultimately you could even find a workable multiple of 12960. But I suspect you can make better use of your CPU time. :)
Nack
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