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New MET: test positions?

Posted By: Timothy Chow
Date: Friday, 23 October 2009, at 12:50 a.m.

A natural question to ask about the new MET that David and Neil are preparing is, will it change the verdicts of any interesting positions? Here is a candidate test position, from the 1979 Monte Carlo World Championship. Rolling it out using MEC26, I find that the decision is a close one. It will be interesting to see if the new MET makes any difference here.

The score is: Villa 13, Westheimer 21 (match to 25 points)

Westheimer to play 13

Villa	118
Westheimer	64
Position ID: s90BABxntx0AAA Match ID: UYksA9AAqAAA

#		Ply	Move	MWC
•	1	R	6/5 6/3	93.91%
			0.841 0.147 0.004 - 0.159 0.003 0.000 93.45% 93.83% 0.000 0.002 0.000 - 0.000 0.000 0.000 0.01% 0.01%
			Full cubeful rollout with var.redn.
			5184 games, Mersenne Twister dice gen. with seed 872270785 and quasi-random dice
			Play: supremo 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]
	2	R	7/3	93.90% ( -0.02%)
			0.839 0.186 0.008 - 0.161 0.015 0.000 93.53% 93.81% 0.000 0.002 0.001 - 0.000 0.000 0.000 0.01% 0.01%
			Full cubeful rollout with var.redn.
			5184 games, Mersenne Twister dice gen. with seed 872270785 and quasi-random dice
			Play: supremo 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]

Messages In This Thread

• New MET: test positions?
  Timothy Chow -- Friday, 23 October 2009, at 12:50 a.m.
  • New MET.. still very close
    neilkaz -- Friday, 23 October 2009, at 7:38 p.m.