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3-ply vs. 4-ply rollouts

Posted By: Kye Hedlund
Date: Friday, 7 January 2011, at 1:36 a.m.

Xavier recently raised the question: For the opening move, how many best plays changed when going from a 3-ply rollout to 4-ply?

Here is some data for second move rollouts.

There are approximately 40 second roll rollouts posted on the forum for which we have both 3-ply and 4-ply XG rollouts. They can be found at

http://www.cs.unc.edu/~hedlund/bg/ThreeFour.html

Direct comparison of the value of 3-ply vs. 4-ply evaluation is difficult since the number of games differ from one rollout to the next. However, there are 7 second rolls (all at $) for which the result differ by at least 90 millipoints equity.

--- Kye Hedlund

64S-44 [R D19] ^25 [R D10] <75

64P-22 [E N1] ^45 [E N10] <15

62S-32 [U S14 W15 H38 T39 Z42] ^15 [U S3 W4 T26 Z27 H30 $34] <45

51S-41 [K T20] ^10 [K T11 U27] <60

43U-64 [P $8] ^20 (non-Jacoby) [P $19 H22] <60

32Z-41 [U H1 S4 T9 h25] ^45 [U H10 T12 S14] <60

31P-32 [Z S7 U21] ^35

[Z S22 U33 D50 T57] <10

Messages In This Thread

• 3-ply vs. 4-ply rollouts
  Kye Hedlund -- Friday, 7 January 2011, at 1:36 a.m.
  • 3-ply vs. 4-ply rollouts
    Matt Ryder -- Friday, 7 January 2011, at 5:55 a.m.
  • 3-ply vs. 4-ply rollouts
    Nack Ballard -- Friday, 7 January 2011, at 6:46 a.m.
  • 3-ply vs. 4-ply rollouts
    Christian Munk-Christensen -- Friday, 7 January 2011, at 12:29 p.m.