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41S-54 data

Posted By: Nack Ballard
Date: Friday, 14 May 2010, at 4:48 p.m.

In Response To: Real opening play backgammon (Daniel Murphy)


2O ' ' ' '5X '3X1X ' '5O

1X1X ' ' '5O '3O ' ' '4X

41S-54


Here is data for 41S-54:

Money
Snowie .. [S X4 R9 D20 H56 h75] 31k 5kHh
GnuBG .. [X S6 R9 D18 H39] 46k 15kD 5k

Other scores (GnuBG):
d [R S1 X3] 10k
s [X S4 R17] 15k
g [X D5 S9 H10 h29] 5k

Key: S = Split (24/20 13/8), X = hit-and-split (24/20 6/1*), R = Run (24/15), D = Down (13/9 13/8), H = Hit (13/8 6/2*), h = hit (13/9 6/1*). Error sizes are in thousandths.

Before brackets, "d" = DMP, "s" = GS, or "g" = GG, else assume money. After brackets is the number of trials (in thousands, rounded down). For example, "s[X S4 R17] 15k" means that at GS (gammon save), X is best, S is -.004, and R is -.017, after 15000+ trials.

It is worth noting that rollout results of Gnu appear to have a bias towards X (hit-and-split) when the hit is on the ace point. For example, for 43Z-51 (money), Gnu is [S X9], whereas Snowie is [S X22] and XG is [S X20].

Nack

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