WAC.123

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jdart
Posts: 3816
Joined: Fri Mar 10, 2006 4:23 am
Location: http://www.arasanchess.org

WAC.123

Post by jdart » Thu Jul 19, 2012 12:08 am

[D] 6k1/1b2rp2/1p4p1/3P4/PQ4P1/2N2q2/5P2/3R2K1 b - -

The copy of WAC I've been using for years has Bxd5 and Rc7 as solutions, but what about Re6? This is the choice of my engine, and a few others I have tried, at least at moderate depths. (I didn't notice this before because I was using a 10 second limit for this test, and until recently it was playing Bxd5 at that time interval).

--Jon

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rvida
Posts: 481
Joined: Thu Apr 16, 2009 10:00 am
Location: Slovakia, EU

Re: WAC.123

Post by rvida » Thu Jul 19, 2012 12:15 am

jdart wrote: The copy of WAC I've been using for years has Bxd5 and Rc7 as solutions, but what about Re6? This is the choice of my engine, and a few others I have tried, at least at moderate depths. (I didn't notice this before because I was using a 10 second limit for this test, and until recently it was playing Bxd5 at that time interval).

--Jon
My copy of WAC lists all 3 moves for this position.

Code: Select all

6k1/1b2rp2/1p4p1/3P4/PQ4P1/2N2q2/5P2/3R2K1 b - - bm Bxd5 Rc7 Re6; id WAC.123;
Critter in multipv=3 mode prefers Re6

zullil
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Full name: Louis Zulli

Re: WAC.123

Post by zullil » Thu Jul 19, 2012 1:13 am

rvida wrote:
jdart wrote: The copy of WAC I've been using for years has Bxd5 and Rc7 as solutions, but what about Re6? This is the choice of my engine, and a few others I have tried, at least at moderate depths. (I didn't notice this before because I was using a 10 second limit for this test, and until recently it was playing Bxd5 at that time interval).

--Jon
My copy of WAC lists all 3 moves for this position.

Code: Select all

6k1/1b2rp2/1p4p1/3P4/PQ4P1/2N2q2/5P2/3R2K1 b - - bm Bxd5 Rc7 Re6; id WAC.123;
Critter in multipv=3 mode prefers Re6
To quantify, here's what Critter-1.6a (8 threads, 4GB hash) offers using MultiPV=3:

Code: Select all

27/71  24:24   16264M  11105K  +7.94 Re6 Qd4 g5 Qd3 Re1+ Rxe1 Qxd3 Re3 Qd4 Kg2 Kg7 Kf3 Qf4+ Ke2 Qxg4+ Kd2 Qd4+ Kc2 Bxd5 Nxd5 Qxd5 f3 Qa2+ Kc1 Qxa4 Kb2 b5 Rc3 Qd1 Rb3 Qd2+ Ka3 Qd6+ Ka2 b4 Kb1 Qd4 Ka2 Qc4 Kb2 Kg6 Ka2 Qc2+ Rb2 Qa4+ Kb1 Qd1+ Ka2 Qxf3 Rxb4 g4 Rb6+ Kf5

27/71  24:24   16264M  11105K  +7.41 Bxd5 Nxd5 Qxd1+ Kh2 Re2 Nf6+ Kg7 Ne4 Qd3 Qc3+ Qxc3 Nxc3 Rxf2+ Kh1 Rd2 g5 Rd3 Nb5 Rg3 Nd6 Rxg5 Ne8+ Kf8 Nd6 f5 Kh2 Kg7 Ne8+ Kh6 Nc7 f4 Ne6 Rg4 Nd4 Kg5 Nf3+ Kf6 Nd2 g5 Nc4 f3 Ne3 Rxa4 Kg3 g4 Nd5+ Kf5 Ne3+ Kg5 Nxg4 Rxg4+ Kxf3 Rh4 Ke3 Kf5 Kd3 Ke5 Ke3 Rg4 Kd3

26/71  24:24   16264M  11105K  +3.55 Rc7 Qe4 Qxc3 Qe8+ Kh7 Kg2 Kg7 g5 Rc4 Qe3 Rg4+ Kf3 Qc4 Qe5+ Kh7 Rh1+ Rh4 Rxh4+ Qxh4 Ke2 Qc4+ Kd2 Qa2+ Kd3 Qxd5+ Qxd5 Bxd5 Kc3 Bc6 Kb4 Kg7 f4 Bd7 a5 bxa5+ Kxa5 Kf8 Kb4 Ke7 Kc5 Ke6 Kd4 Kf5 Ke3

kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 3:19 pm

Re: WAC.123

Post by kgburcham » Thu Jul 19, 2012 2:20 am

[D] 6k1/1b2rp2/1p4p1/3P4/PQ4P1/2N2q2/5P2/3R2K1 b - -
but what about Re6?
Houdini
32/89 -10.60 1...Re6 (84.107.540.207) 44034 TB:3.396

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