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41S-54 data: update

Posted By: Nack Ballard
Date: Friday, 26 August 2011, at 10:11 p.m.

In Response To: 41S-54, AtS rollouts (Nack Ballard)


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

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

41S-54


For XG2 4-ply, we have the following data:

    ..[X=S R8 D18] "^46*29 5 (Neil, David) S is 44.6% best
    d[R S3 X4] "^11 (Stick) R is 99.9% best
    s[X S6] "^7 (Stick) X is 100.0% best
    g[D X2 S11 H13] "^62 (Jason) D is 99.8% best

For money, X is .0002 ahead of S after 42k. Dmitriy is in the process of extending the X and S plays of that rollout. If S ultimately triumphs, we will have discovered a T4 (technical 4-score position, a great rarity). Otherwise, 41S-54 will join the ranks of the T3's.

Including the information listed in my original thread, here is all the data we have for 41S-54:

    ..[S X4 R9 D20] ~31 (Dennis, Gary)
    ..[X S6 R9 D18] /46**15 (Stick)
    ..[X S2 R4 D19] <62**36 (David)
    ..[S X2 R9] ^46 (Neil)
    ..[X=S R8 D18] "^46*29 5 (Neil, David), Dmitriy is extending

    d[R S1 X3] /10 (Stick)
    d[R S1 X5] <31 (David)
    d[R S1 X2] <5 (Stick)
    d[R S2 X3 D17] <31**15 (Stick, David)
    d[R S3 X3 H16 D18 h31] “<62****15 (Bob, Ken)
    d[R S3 X4] "^11 (Stick)

    s[X S4 R17] /15 (Stick)
    s[X S9 R24] <31 (David)
    s[X S4 R17 D22 H23] "<31*20 15 (David)
    s[X S6] "^7 (Stick)

    g[X D5 S9 H10] /5 (Stick)
    g[D X5 R12] <31 (David)
    g[D X2 S11 H13] "<31 (David)
    g[D X2 S11 H13] "^62 (Jason)

In short: For money, it is not yet(?) clear whether X (hit-and-split, 24/20 6/1*) or S (Split, 24/20 13/8) is best. R (Run, 24/15) seems best at dmp, X is best at gammon save, and D (Down, 13/9 13/8) seems best at gammon go.

Nack

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