Now I am going to look what happens if white occupies the 3 and 4-point.
Code:
Full cubeful rollout with var.redn.
1296 games, Mersenne Twister dice gen. with seed 767259618 and quasi-random dice
Play: world class 2-ply cubeful prune [world class]
keep the first 0 0-ply moves and up to 8 more moves within equity 0,16
Skip pruning for 1-ply moves.
Cube: 2-ply cubeful prune [world class]
Open 6-point
White - Pips 46. Match Score 0/64
Black - Pips 126. Match Score 0/64
Black to Play 5-4
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Code:
1. Rollout 19/14 10/6 Eq.: -0,356
0,457 0,000 0,000 - 0,543 0,217 0,061 CL -0,365 CF -0,356
2. Rollout 19/10 Eq.: -0,383 ( -0,027)
0,438 0,000 0,000 - 0,562 0,215 0,039 CL -0,380 CF -0,383
Slotting seems to be right, but it is only apparent.
open 5-point
White - Pips 46. Match Score 0/64
Black - Pips 119. Match Score 0/64
Black to Play 4-1
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Code:
1. Rollout 24/23 9/5 Eq.: -0,178
0,503 0,000 0,000 - 0,497 0,166 0,044 CL -0,206 CF -0,178
2. Rollout 11/10 9/5 Eq.: -0,229 ( -0,050)
0,488 0,000 0,000 - 0,512 0,175 0,045 CL -0,245 CF -0,229
3. Rollout 24/19 Eq.: -0,298 ( -0,119)
0,463 0,000 0,000 - 0,537 0,204 0,037 CL -0,316 CF -0,298
This shows that the 1 should be played 24/23, but in most cases we don't throw a 1, so that's why I take 54 again:
White - Pips 46. Match Score 0/64
Black - Pips 127. Match Score 0/64
Black to Play 5-4
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Code:
1. Rollout 19/10 Eq.: -0,315
0,463 0,000 0,000 - 0,537 0,197 0,047 CL -0,319 CF -0,315
2. Rollout 19/14 9/5 Eq.: -0,335 ( -0,020)
0,466 0,000 0,000 - 0,534 0,207 0,055 CL -0,332 CF -0,335
Not slotting is slightly superior, because it brings a second checker pointing on the open gap. Compare with 19/10 in the first example, where the two checkers are on one point, so not diversified.
open 4-point
White - Pips 46. Match Score 0/64
Black - Pips 128. Match Score 0/64
Black to Play 5-4
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Code:
1. Rollout 19/10 Eq.: -0,079
0,525 0,000 0,000 - 0,475 0,171 0,044 CL -0,166 CF -0,079
2. Rollout 24/19 8/4 Eq.: -0,351 ( -0,272)
0,471 0,000 0,000 - 0,529 0,238 0,040 CL -0,337 CF -0,351
3. Rollout 24/20 24/19 Eq.: -0,479 ( -0,400)
0,450 0,000 0,000 - 0,550 0,283 0,017 CL -0,403 CF -0,479
In this case bringing a second pointer is so much superior (I stopped the rollout prematurely), that I am going to find out in one of my next posts, whether this always is a better strategy. There also could be a bug.
White - Pips 46. Match Score 0/64
Black - Pips 128. Match Score 0/64
Black to Play 4-3
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Code:
1. Rollout 19/12 Eq.: -0,187
0,500 0,000 0,000 - 0,500 0,184 0,044 CL -0,228 CF -0,187
2. Rollout 19/16 8/4 Eq.: -0,226 ( -0,038)
0,496 0,000 0,000 - 0,504 0,194 0,053 CL -0,255 CF -0,226
3. Rollout 24/17 Eq.: -0,388 ( -0,201)
0,447 0,000 0,000 - 0,553 0,256 0,041 CL -0,405 CF -0,388
My conclusion for now is that in these cases it is better to wait with slotting until another pointer has arrived.