Warp Gammon Stumpers

Solutions to

27 Jan 2017
(Answers next month)

Escape hatch

Solutions

Position 1

Move number 3: Black to play 33

+-13-14-15-16-17-18-+---+-19-20-21-22-23-24-+

+-12-11-10--9--8--7-+---+--6--5--4--3--2--1-+

Pip counts: Red 152, Black 155
Position ID: 4PPgBSDg28EBMA Match ID: cIltAQAAAAAA

Annotation

The match has barely started and the race is even. Black has to balance his slightly favourable blocking position with Red having succeeded with escaping one of his back men.

Ply

Move

Equity

8/5(2) 6/3(2)

+0.547

0.608	0.256	0.009	-	0.392	0.095	0.006	+0.389	+0.547
0.001	0.001	0.000	-	0.001	0.001	0.000	0.002	0.007

Full cubeful rollout with var.redn.

5040 games, Mersenne Twister dice gen. with seed 564859394 and quasi-random dice

Play: 0-ply cubeful [expert]

Cube: 0-ply cubeful [expert]

24/21(2) 6/3(2)

+0.450 ( -0.097)

0.604	0.174	0.005	-	0.396	0.065	0.002	+0.324	+0.450
0.001	0.001	0.000	-	0.001	0.000	0.000	0.002	0.005

Full cubeful rollout with var.redn.

5040 games, Mersenne Twister dice gen. with seed 564859394 and quasi-random dice

Play: 0-ply cubeful [expert]

Cube: 0-ply cubeful [expert]

24/21(2) 8/5(2)

+0.449 ( -0.098)

0.595	0.198	0.005	-	0.405	0.066	0.003	+0.328	+0.449
0.001	0.001	0.000	-	0.001	0.001	0.000	0.002	0.006

Full cubeful rollout with var.redn.

5040 games, Mersenne Twister dice gen. with seed 564859394 and quasi-random dice

Play: 0-ply cubeful [expert]

Cube: 0-ply cubeful [expert]

24/18(2)

+0.370 ( -0.177)

0.587	0.129	0.003	-	0.413	0.060	0.002	+0.246	+0.370
0.001	0.001	0.000	-	0.001	0.001	0.000	0.002	0.005

Full cubeful rollout with var.redn.

5040 games, Mersenne Twister dice gen. with seed 564859394 and quasi-random dice

Play: 0-ply cubeful [expert]

Cube: 0-ply cubeful [expert]

24/21 8/5(3)

+0.324 ( -0.224)

0.565 0.205 0.007 - 0.435 0.096 0.003

Position 2

Move number 3: Black to play 22

Pip counts: Red 127, Black 158
Position ID: hm+DAyCwc+EBIg Match ID: cAlpAUAAGAAA

Annotation

Black is further behind in this position and can't escape his back men so is looking to contain the remaining Red blot in his home board.

Ply

Move

Equity

13/11 8/4 6/4

+0.062

0.527	0.133	0.007	-	0.473	0.194	0.013	-0.002	+0.062
0.001	0.001	0.000	-	0.001	0.001	0.001	0.002	0.006

Full cubeful rollout with var.redn.

5040 games, Mersenne Twister dice gen. with seed 565140566 and quasi-random dice

Play: 0-ply cubeful [expert]

Cube: 0-ply cubeful [expert]

13/7 9/7

+0.026 ( -0.036)

0.515	0.121	0.005	-	0.485	0.183	0.007	-0.024	+0.026
0.001	0.001	0.000	-	0.001	0.001	0.000	0.002	0.006

Full cubeful rollout with var.redn.

5040 games, Mersenne Twister dice gen. with seed 565140566 and quasi-random dice

Play: 0-ply cubeful [expert]

Cube: 0-ply cubeful [expert]

24/22 8/4 6/4

-0.100 ( -0.162)

0.489	0.116	0.006	-	0.511	0.213	0.009	-0.114	-0.100
0.001	0.001	0.000	-	0.001	0.001	0.000	0.002	0.006

Full cubeful rollout with var.redn.

5040 games, Mersenne Twister dice gen. with seed 565140566 and quasi-random dice

Play: 0-ply cubeful [expert]

Cube: 0-ply cubeful [expert]

9/7 8/4 6/4

-0.110 ( -0.172)

0.488	0.124	0.007	-	0.512	0.220	0.012	-0.118	-0.110
0.001	0.001	0.000	-	0.001	0.001	0.000	0.002	0.006

Full cubeful rollout with var.redn.

5040 games, Mersenne Twister dice gen. with seed 565140566 and quasi-random dice

Play: 0-ply cubeful [expert]

Cube: 0-ply cubeful [expert]

13/9(2)

-0.110 ( -0.172)

0.479 0.119 0.005 - 0.521 0.192 0.007

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