Interesting position I recently got from Swami

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Robert Flesher
Posts: 1280
Joined: Tue Aug 18, 2009 3:06 am

Re: h5,Bh3,h5,Rc1,h5,Bh3

Post by Robert Flesher »

New game
r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - - 0 1

Analysis by Stockfish 1.6s:

1.h5 Raf8 2.hxg6 hxg6
³ (-0.28) Depth: 1 00:00:00
1.h5 Qe7 2.hxg6 hxg6 3.Qc2
= (-0.24) Depth: 5 00:00:00
1.h5 Qe7 2.hxg6 hxg6 3.Qc2
= (-0.24) Depth: 5 00:00:00
1.h5 Qe7 2.hxg6 hxg6 3.Qc2
= (-0.24) Depth: 5 00:00:00
1.h5 Qe7 2.hxg6 hxg6 3.Qc2
= (-0.24) Depth: 5 00:00:00
1.h5 Qe7 2.hxg6 hxg6 3.Qc2
= (-0.24) Depth: 5 00:00:00
1.h5 Qe7 2.hxg6 hxg6 3.Qc2 Qf6
= (-0.20) Depth: 6 00:00:00 8kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Qa3 4.hxg6 hxg6 5.Nxe5 Nxe5 6.Bxd5 cxd5 7.Rxe5 Qxb3
= (-0.20) Depth: 7 00:00:00 16kN
1.h5 Qd6 2.Ne4 Qe7 3.Qh6
= (0.00) Depth: 8 00:00:00 26kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Qa3 4.fxe5 Qxb3 5.e6 Qb6+ 6.Kh2
= (0.04) Depth: 9 00:00:00 67kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Qd8 4.hxg6 hxg6 5.Nxe5 Nxe5 6.Bxd5 cxd5 7.Rxe5 Qb6+ 8.Re3
² (0.64) Depth: 10 00:00:00 179kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxh5 Qe7 4.Rc1 Rg5 5.Qh3 Re8 6.f4 Rg6 7.Rxe5
² (0.56) Depth: 11 00:00:00 330kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 4.Rxe5 h4 5.gxh4 Kh8 6.Rde1 Rag8 7.Rg5 Rxg5 8.hxg5 Rxg5 9.Nxb7
= (0.24) Depth: 12 00:00:00 744kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 4.Rxe5 h4 5.gxh4 Kh8 6.Rd4 Rag8 7.Rg5 Re7 8.Be4 Rge8 9.Bf5 Re1+ 10.Kg2
= (0.20) Depth: 13 00:00:00 1300kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 4.Rxe5 h4 5.gxh4 Kh8 6.Rd4 Rag8 7.Rg5 h6 8.Rg3 Rf7 9.Be4 Re8 10.Rd2 h5 11.Rg5
= (0.24) Depth: 14 00:00:01 3813kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 4.Rxe5 h4 5.gxh4 Kh8 6.Rd4 Rag8 7.Rg5 h6 8.Rg3 Rf7 9.Be4 Re8 10.Rd2 h5 11.Rg5
² (0.28) Depth: 15 00:00:01 5495kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Qb2 Nd7 5.f4 Qc5+ 6.Kh1 exf4 7.Bxd7 fxg3 8.Be6+
² (0.44) Depth: 15 00:00:01 6983kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Qb2 Re8 5.f4 Qc5+ 6.Kh2 Qc3 7.Qb1 Qb4 8.Rxe5 Rxe5 9.fxe5 Rf2+ 10.Kg1 Qf8 11.Be6+ Kh8 12.Kh1
= (0.24) Depth: 16 00:00:02 11431kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Qc2 Raf8 5.f4 Nd7 6.Bg4 Ra8 7.Qg2 Kh8 8.Bxd7 Qxd7 9.fxe5 Rff8 10.e6 Qc7 11.Kh2 Qe7 12.Qc2
² (0.56) Depth: 17 00:00:06 30776kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Kh8 5.Rde1 Re8 6.Rxe5 Qxe5 7.Rxe5 Rxe5 8.Bg2 Kg8 9.Ne4 Rf8 10.f4 Re7 11.Qxa5 Kg7 12.Bf3
² (0.56) Depth: 18 00:00:14 67549kN

(, Microsoft 02.02.2010)
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Robert Flesher
Posts: 1280
Joined: Tue Aug 18, 2009 3:06 am

Re: h5,Bh3,h5,Rc1,h5,Bh3

Post by Robert Flesher »

New game
r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - - 0 1

Analysis by bright-0.5c:

1.Bxd5 cxd5
-+ (-1.53) Depth: 1/2 00:00:00
1.Nd3
µ (-0.74) Depth: 1/2 00:00:00
1.Ne6
³ (-0.55) Depth: 1/2 00:00:00
1.Re4
³ (-0.54) Depth: 1/2 00:00:00
1.Qg5
³ (-0.31) Depth: 1/2 00:00:00
1.Qh6
³ (-0.29) Depth: 1/2 00:00:00
1.Qh6 Rd8
³ (-0.40) Depth: 2/7 00:00:00
1.Qg5 Qd6
³ (-0.34) Depth: 2/7 00:00:00
1.Qg5 Qd6 2.Rc1
³ (-0.53) Depth: 3/8 00:00:00
1.h5 Nd7 2.hxg6 hxg6
³ (-0.39) Depth: 3/11 00:00:00
1.h5 Nd7 2.hxg6 hxg6
³ (-0.39) Depth: 4/11 00:00:00
1.h5 Nd7 2.hxg6 hxg6 3.Qc2 Nxc5 4.Qxc5
³ (-0.29) Depth: 5/14 00:00:01
1.h5 Qd6 2.hxg6 hxg6 3.Qc3 Qf8
= (-0.21) Depth: 6/18 00:00:01 103kN
1.h5 Qd6 2.hxg6 hxg6 3.Nd3 Nd7 4.Qg5 Nc3
= (-0.21) Depth: 7/19 00:00:01 142kN
1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qd7 4.Qg5 Qf5 5.Rd2 Qxg5 6.Nxg5
= (-0.14) Depth: 8/19 00:00:01 282kN
1.h5 Qe7 2.Rc1 Qf6 3.Ne4 Qg7 4.hxg6 hxg6 5.Nd6
= (-0.13) Depth: 9/22 00:00:02 743kN
1.h5 Qe7 2.Rc1 Qf6 3.Ne4 Qh8 4.Rc5 Nd7 5.Rxa5 Rxa5 6.Qxa5 gxh5
= (-0.06) Depth: 10/25 00:00:02 1199kN
1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qf8 4.Qg5 Qg7 5.Bh3 Re7 6.Nc5 Qf6
= (0.18) Depth: 11/33 00:00:03 5302kN
1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qf8 4.Qg5 Qg7 5.Bh3 Re7 6.Nc5 Kh8 7.Qh4+ Qh7
= (0.24) Depth: 12/33 00:00:03 7624kN
1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qe7 4.Qh6 Rg7 5.Ng5 Rf8 6.Rd2 Nc3 7.Be4 Nxe4 8.Rxe4
= (0.20) Depth: 13/36 00:00:03 13574kN
1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qe7 4.Qh6 Rg7 5.Ng5 Rf8 6.Bh3 Nc7 7.Bg4 Nbd5 8.Rd2
= (0.24) Depth: 14/38 00:00:04 34847kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 8.Be6+ Kh8 9.Qf2
² (0.35) Depth: 14/39 00:00:06 51865kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 8.Re6 Qf7 9.Re5
² (0.38) Depth: 15/39 00:00:08 66824kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 8.Re6 Qg7 9.Qf2 fxg3 10.Qxg3
² (0.26) Depth: 16/44 00:00:13 106175kN

(, Microsoft 02.02.2010)
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User avatar
michiguel
Posts: 6401
Joined: Thu Mar 09, 2006 8:30 pm
Location: Chicago, Illinois, USA

Re: Interesting position I recently got from Swami

Post by michiguel »

Dann Corbit wrote:[d]r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -
How long until your engine sees Bh3? (It takes a while for h5 to fade).
I am wondering if any engine sees it before ply 19.
Rybka took about 1/2 hour on my hardware, and IvanHoe about a minute.

Gaviota (released version) takes 3.6 seconds, 8 plies to see it. It switches briefly at ply 11 and comes back to Bh3 at ply 12.
An experimental version takes ~5 minutes and ply 13 to see Bh3 and sticks to it.
(AMD 2X (two cores used) 2.4 Ghz 32 bits)

Released version:

Code: Select all

    279626   6:      0.7    +0.22  1.Qb2 Qd6 2.Nd3 Nd7 3.Bxd5 cxd5 4.Nxe5
                                   Nxe5 5.Rxe5
    359041   7       0.9    +0.22  1.Qb2 Qd6 2.Nd3 Nd7 3.Bxd5 cxd5 4.Nxe5
                                   Nxe5 5.Rxe5
    569466   7:      1.3    +0.22  1.Qb2 Qd6 2.Nd3 Nd7 3.Bxd5 cxd5 4.Nxe5
                                   Nxe5 5.Rxe5
    837299   8       1.9    +0.22  1.Qb2 Qd6 2.Nd3 Nd7 3.Bxd5 cxd5 4.Nxe5
                                   Nxe5 5.Rxe5
   1646484   8       3.6    +0.32  1.Bh3 Qd6 2.Rc1 Re7 3.Re2 Qf6 4.Bg4 Rf7
   1766677   8:      3.8    +0.32  1.Bh3 Qd6 2.Rc1 Re7 3.Re2 Qf6 4.Bg4 Rf7
   2629724   9       5.7    +0.32  1.Bh3 Qd6 2.Rc1 Kh8 3.Qb2 Re8 4.f4 Nb4
                                   5.Rxe5 Rxe5 6.fxe5
   4238533   9:      8.9    +0.32  1.Bh3 Qd6 2.Rc1 Kh8 3.Qb2 Re8 4.f4 Nb4
                                   5.Rxe5 Rxe5 6.fxe5
   5962756  10      12.8    +0.32  1.Bh3 Qd6 2.Rc1 Kh8 3.Qb2 Re8 4.f4 Nb4
                                   5.Rxe5 Rxe5 6.fxe5
   9337909  10:     19.0    +0.32  1.Bh3 Qd6 2.Rc1 Kh8 3.Qb2 Re8 4.f4 Nb4
                                   5.Rxe5 Rxe5 6.fxe5
  16834955  11      34.6    +0.30  1.Bh3 Qd6 2.Rc1 Re7 3.Bg4 Qf6 4.Ne4 Qf8
                                   5.Rc5 h5 6.Bh3
  62606488  11     123.0    +0.37  1.Rc1 Qd6 2.h5 Kh8 3.hxg6 hxg6 4.Be4
                                   Rh7 5.Red1 Qf6 6.Ra1
  70626976  11:    137.7    +0.37  1.Rc1 Qd6 2.h5 Kh8 3.hxg6 hxg6 4.Be4
                                   Rh7 5.Red1 Qf6 6.Ra1
 157260639  12     299.0    +0.30  1.Rc1 Re7 2.Bh3 Nf6 3.Be6+ Kg7 4.Red1
                                   Nbd5 5.Rc4 Qd6 6.Bxd5 cxd5 7.Re1
 201088002  12     385.2    +0.41  1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+
                                   5.Kh1 exf4 6.Ne4 Qf8 7.Nxf6+ Qxf6
                                   8.Be6+ Kh8
 242923760  12:    460.7    +0.41  1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+
                                   5.Kh1 exf4 6.Ne4 Qf8 7.Nxf6+ Qxf6
                                   8.Be6+ Kh8
 322585617  13     611.4    +0.41  1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+
                                   5.Kh1 exf4 6.Ne4 Qf8 7.Nxf6+ Qxf6
                                   8.Be6+ Kh8

Experimental:

Code: Select all

    641633   8:      1.4    +0.22  1.Qb2 Qd6 2.Nd3 Nd7 3.Bxd5 cxd5 4.Nxe5
                                   Nxe5 5.Rxe5
   1612608   9       3.1    +0.20  1.Qb2 Re7 2.Rd3 Qd6 3.Ne4 Qb4 4.Re2 Nd7
                                   5.Qc1
   3533383   9       7.0    +0.36  1.Rc1 Qd6 2.Be4 Kh8 3.Red1 Qf8 4.Qb2
                                   Kg8 5.Qxe5 Rxf2 6.Nxb7
   3640225   9:      7.2    +0.36  1.Rc1 Qd6 2.Be4 Kh8 3.Red1 Qf8 4.Qb2
                                   Kg8 5.Qxe5 Rxf2 6.Nxb7
   5090660  10      10.0    +0.32  1.Rc1 Qd6 2.Bh3 Kh8 3.Qb2 Re8 4.f4 Nb4
                                   5.Rxe5 Rxe5 6.fxe5
   5624562  10:     10.9    +0.32  1.Rc1 Qd6 2.Bh3 Kh8 3.Qb2 Re8 4.f4 Nb4
                                   5.Rxe5 Rxe5 6.fxe5
  12898722  11      23.5    +0.38  1.Rc1 Qd6 2.Bh3 Re7 3.Kh2 Rf8 4.Re2 Ra8
                                   5.f3 Rf8 6.Re3
  13900968  11:     25.2    +0.38  1.Rc1 Qd6 2.Bh3 Re7 3.Kh2 Rf8 4.Re2 Ra8
                                   5.f3 Rf8 6.Re3
  19738063  12      35.5    +0.36  1.Rc1 Qd6 2.Bh3 Re7 3.Kh2 Kh8 4.Bg2 Rf7
                                   5.Qb2 Kg8 6.Rxe5 Rd8
  24515849  12:     43.3    +0.36  1.Rc1 Qd6 2.Bh3 Re7 3.Kh2 Kh8 4.Bg2 Rf7
                                   5.Qb2 Kg8 6.Rxe5 Rd8
  92025130  13     166.0    +0.27  1.Rc1 Re7 2.Bh3 Qd6 3.Kh2 Qf6 4.Rcd1
                                   Qd6 5.Ne4 Qb4 6.Qxb4 Nxb4 7.Nd6
 145581692  13     258.7    +0.36  1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 4.Rxe5
                                   h4 5.gxh4 Rf8 6.Rg5 Rxg5 7.hxg5 Nc3
                                   8.Rd6 Ne2+ 9.Kf1
 189412527  13     334.6    +0.41  1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+
                                   5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6
                                   8.Be6+ Kh8
 193305871  13:    341.4    +0.41  1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+
                                   5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6
                                   8.Be6+ Kh8
 223210475  14     397.6    +0.43  1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Qb2 Re8
                                   5.f4 Qc5+ 6.Kh1 Nc3 7.Ne4 Nxe4 8.Rxe4
                                   Nd5 9.Rxe5 Rxe5 10.Qxe5
 258769006  14:    462.6    +0.43  1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Qb2 Re8
                                   5.f4 Qc5+ 6.Kh1 Nc3 7.Ne4 Nxe4 8.Rxe4
                                   Nd5 9.Rxe5 Rxe5 10.Qxe5
 399480216  15     704.4    +0.50  1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Qb2 Re8
                                   5.f4 Qc5+ 6.Kh1 Qc3 7.Qxc3 Nxc3 8.Rd3
                                   Nbd5 9.Rxe5
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Martin Thoresen
Posts: 1833
Joined: Thu Jun 22, 2006 12:07 am

Re: Interesting position I recently got from Swami

Post by Martin Thoresen »

Zappa Mexico II 64-bit 4CPU doesn't find it in 2 minutes.

Code: Select all

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -

Engine: Zappa Mexico II 64-bit 4CPU (2048 MB)
by Anthony Cozzie

12/38  0:01   +0.49    1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qd7 4.Ng5 Re7 
                       5.Be4 Qg4 6.Bxg6 (5.105.031) 4140 

12/38  0:01   +0.49    1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qd7 4.Ng5 Re7 
                       5.Be4 Qg4 6.Bxg6 (5.753.510) 4142 

13/45  0:02   +0.47    1.h5 Qd6 2.Ne4 Qf8 3.Bh3 Re7 4.Qg5 Qf7 
                       5.Nd6 Qf6 6.Qxf6 Nxf6 7.hxg6 hxg6 (10.349.861) 4198 

13/45  0:02   +0.47    1.h5 Qd6 2.Ne4 Qf8 3.Bh3 Re7 4.Qg5 Qf7 
                       5.Nd6 Qf6 6.Qxf6 Nxf6 7.hxg6 hxg6 (12.075.405) 4229 

14/45  0:04   +0.52    1.h5 Qd6 2.Ne4 Qf8 3.Nc3 Qc5 4.Nxd5 Nxd5 
                       5.Rxe5 Raf8 6.Rxd5 cxd5 7.Bxd5 gxh5 
                       8.Bxf7+ Rxf7 (19.525.797) 4345 

14/45  0:05   +0.52    1.h5 Qd6 2.Ne4 Qf8 3.Nc3 Qc5 4.Nxd5 Nxd5 
                       5.Rxe5 Raf8 6.Rxd5 cxd5 7.Bxd5 gxh5 
                       8.Bxf7+ Rxf7 (22.382.870) 4387 

15/47  0:11   +0.51    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 Qf6 6.Qxf6 Rxf6 7.Nc5 Raf8 (52.207.480) 4622 

15/47  0:13   +0.51    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 Qf6 6.Qxf6 Rxf6 7.Nc5 Raf8 (60.609.838) 4652 

16/49  0:19   +0.51    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 Qf6 6.Qxf6 Rxf6 7.Nc5 Raf8 (91.655.566) 4648 

16/49  0:23   +0.51    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 Qf6 6.Qxf6 Rxf6 7.Nc5 Raf8 (109.076.854) 4652 

17/53  0:37   +0.57    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 h4 6.Rd4 Qf6 7.Rg4+ Kh8 
                       8.Rxh4 Re8 9.Qe2 Nc3 (177.314.012) 4692 

17/53  0:44   +0.57    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 h4 6.Rd4 Qf6 7.Rg4+ Kh8 
                       8.Rxh4 Re8 9.Qe2 Nc3 (208.522.227) 4724 

18/54  1:04   +0.57    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 h4 6.Rd4 Qf6 7.Rg4+ Kh8 
                       8.Rxh4 Re8 9.Qe2 Nc3 (305.536.966) 4735 

18/54  1:19   +0.57    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 h4 6.Rd4 Qf6 7.Rg4+ Kh8 
                       8.Rxh4 Re8 9.Qe2 Nc3 (376.124.043) 4748 

best move: h4-h5 time: 2:01.446 min  n/s: 4.680.176  nodes: 568.989.325

Toga II 1.4.1SE 4CPU finds it immediately.

Code: Select all

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -

Engine: Toga II 1.4.1SE 4CPU (1024 MB)
by Thomas Gaksch and Fabien Letouzey

14/30  0:01   +0.39    1.Bh3 Qe7 2.Rc1 Kh8 3.Be6 Rf3 4.Qb2 Qf6 
                       5.Bg4 e4 6.Qxf6+ Rxf6 7.Rxe4 h5 
                       8.Be2 (2.172.908) 6153 

15/33  0:02   +0.32    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Nd7 
                       5.Bxd7 Qxd7 6.Rxe5 Rff8 7.Ne6 Rfe8 
                       8.f5 Qd6 9.Qf4 Nxf4 10.Rxd6 (3.918.341) 6134 

16/36  0:04   +0.38    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Nd7 
                       5.Bxd7 Qxd7 6.Rxe5 Rff8 7.Ne6 Rf6 
                       8.Nc5 Qg4 9.Kh2 (7.206.220) 6272 

16/34  0:04   +0.41    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Nd7 
                       5.Bxd7 Qxd7 6.Rxe5 Qg4 7.Kh2 Rf5 
                       8.Rxf5 Qxf5 9.Re1 Qg4 (7.244.645) 6272 

17/39  0:08   +0.24    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 
                       5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 
                       8.Rf1 Kh8 9.Rde1 c5 10.Bg4 (13.397.544) 6360 

18/39  0:19   +0.21    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Qb2 Re8 
                       5.f4 Nd7 6.Bxd7 Qxd7 7.Rxe5 Rff8 
                       8.Rde1 Qg7 9.Ne6 (31.509.059) 6351 

best move: Bg2-h3 time: 0:31.060 min  n/s: 6.308.532  nodes: 195.350.000

Stockfish 1.6.3 JA 64-bit 4CPU finds it in 17 seconds.

Code: Select all

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -

Engine: Stockfish 1.6.3 JA 64-bit 4CPU (2048 MB)
by Tord Romstad, Marco Costalba, Joona Kii

15.00  0:01   +0.36    1.h5 gxh5 2.Bh3 Kh8 3.Ne6 Qd6 4.Qh6 Qe7 
                       5.Qxh5 Nd7 6.Ng5 Rf6 7.Bxd7 Qxd7 
                       8.Rxe5 (7.761.326) 5473 

16.01  0:02   +0.52    1.h5 gxh5 2.Bh3 Kh8 3.Ne6 Qd6 4.Qh6 Qe7 
                       5.Qxh5 Qf6 6.Qxe5 Qxe5 7.Rxe5 Nd7 
                       8.Rg5 h6 9.Rf5 Re7 (17.108.561) 6613 

17.01  0:03   +0.44    1.h5 gxh5 2.Bh3 Kh8 3.Qh6 Rg8 4.Be6 Rf6 
                       5.Qxh5 Nf4 6.Qxe5 Qxe5 7.Rxe5 Nxe6 
                       8.Rxe6 Rxe6 9.Nxe6 Nd5 10.Re1 Rg6 
                       11.Kg2 Rf6 (23.024.087) 6951 

18.01  0:05   +0.36    1.h5 gxh5 2.Bh3 Kh8 3.Qh6 Rg8 4.Be6 Rf6 
                       5.Qxh5 Nf4 6.Qxe5 Qxe5 7.Rxe5 Nxe6 
                       8.Nxe6 Nd5 9.Nd4 Rf7 10.Rde1 Rf6 
                       11.Nf5 Rff8 (37.067.627) 7395 

19.01  0:10   +0.28    1.h5 gxh5 2.Bh3 Kh8 3.Qh6 h4 4.Qxh4 Qe7 
                       5.Qh5 Nf4 6.gxf4 Rg7+ 7.Kf1 Qxc5 
                       8.Rxe5 Qf8 9.Be6 Qxf4 10.Rxa5 Rb8 
                       11.Qe5 Qf8 (84.115.114) 7867 

19.04  0:17   +0.60++  1.Bh3 Kh8 2.Qb2 Re7 3.Be6 Rf8 4.Rxe5 (143.467.027) 7979 

20.01  0:52   +0.68    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Nd7 
                       5.Rde1 b6 6.f4 Nc5 7.Rxe5 Qd8 8.Bg2 Rd6 
                       9.Qc2 Qd7 10.Bh3 Qd8 11.Be6+ Nxe6 
                       12.Rxe6 Rxe6 13.Rxe6 (426.597.013) 8160 

best move: Bg2-h3 time: 1:00.887 min  n/s: 8.156.203  nodes: 496.517.027

Spark 0.3 64-bit 4CPU doesn't find it in 2 minutes.

Code: Select all

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -

Engine: Spark 0.3 64-bit 4CPU (1024 MB)
by AJ Siemelink

17/30  0:02   +0.28    1.h5 (31.437.484) 11717 

17/31  0:02   +0.19    1.h5 Qd6 2.Ne4 Qe7 3.hxg6 hxg6 4.Qh6 Rg7 
                       5.Ng5 Qd6 6.Bh3 Re8 7.f4 Nd7 8.Bxd7 Rxd7 
                       9.fxe5 Rxe5 10.Rxe5 Qxe5 11.Qxg6+ Rg7 (32.839.166) 11628 

18/34  0:04   +0.09    1.h5 Qd6 2.Ne4 Qb4 3.hxg6 hxg6 4.Qg5 Kh7 
                       5.Qxe5 Re7 6.Ng5+ Kg8 7.Qa1 Rae8 
                       8.Rxe7 Qxe7 9.Ne4 Qb4 10.Qb1 Nd7 
                       11.f4 Qb6+ 12.Kh1 (48.508.811) 11912 

19/38  0:07   +0.19    1.h5 Qd6 2.Ne4 Qb4 3.hxg6 hxg6 4.Qg5 Kh7 
                       5.Qxe5 Re7 6.Ng5+ Kg8 7.Qa1 Rae8 
                       8.Rxe7 Qxe7 9.Ne4 Qb4 10.Qb1 Nd7 
                       11.Ng5 Qd6 (84.936.692) 12099 

20/38  0:11   +0.27    1.h5 Qd6 2.Ne4 Qb4 3.hxg6 hxg6 4.Qg5 Kh7 
                       5.Qxe5 Re7 6.Ng5+ Kg8 7.Qa1 Rae8 
                       8.Rxe7 Qxe7 9.Ne4 Qb4 10.Qb1 Nd7 
                       11.Ng5 Qd6 12.Qb2 (141.929.142) 12327 

21/42  0:41   +0.38    1.h5 gxh5 2.Bh3 Kh8 3.Qb2 Re8 4.Be6 Rf3 
                       5.Qxe5+ Qxe5 6.Rxe5 h4 7.Bxd5 Rxg3+ 
                       8.fxg3 Rxe5 9.Nxb7 Nxd5 10.Nxa5 hxg3 
                       11.Nxc6 Re6 12.b4 Nc3 (510.085.371) 12191 

22/45  1:10   +0.42    1.h5 gxh5 2.Bh3 Rf6 3.Qg5+ Rg6 
                       4.Be6+ Kh8 5.Qxh5 Nf4 6.Qxe5+ Qxe5 
                       7.Rxe5 Nxe6 8.Rxe6 Rxe6 9.Nxe6 Nd5 
                       10.Kg2 Re8 11.Nf4 Nxf4+ 12.gxf4 Rf8 
                       13.Kf3 Kg7 14.Rd7+ (843.710.757) 11984 

23/49  1:54   +0.48    1.h5 gxh5 2.Bh3 Rf6 3.Qg5+ Rg6 
                       4.Qxe5 Qxe5 5.Rxe5 h4 6.Bf5 Rg7 
                       7.Ne6 Re8 8.Rde1 Rge7 9.gxh4 Nf4 
                       10.R5e3 Nxe6 11.Bxe6+ Kg7 12.Bf5 Nd5 
                       13.Rxe7+ Rxe7 14.Rxe7+ (1.346.762.488) 11761 

best move: h4-h5 time: 2:00.573 min  n/s: 11.737.963  nodes: 1.415.281.497

Loop M1-T 64-bit 4CPU doesn't find it in 2 minutes.

Code: Select all

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -

Engine: Loop M1-T 64-bit 4CPU (1024 MB)
by Fritz Reul

13.00  0:01   0.00     1.h5 Qd6 2.Ne4 Qf8 3.Bh3 Re7 4.Qg5 Qf7 
                       5.Rd3 Ree8 6.Bg4 Rad8 7.hxg6 (19.747.812) 14289 

14.01  0:02   +0.06    1.h5 Qd6 2.Ne4 Qe7 3.hxg6 hxg6 4.Qh6 Rg7 
                       5.Ng5 Rf8 6.Bh3 Rf6 7.Bg4 Qd6 8.Rd2 (34.840.268) 14349 

15.01  0:06   +0.05    1.h5 gxh5 2.Ne6 Qd6 3.Qg5+ Kh8 
                       4.Qxe5+ Qxe5 5.Rxe5 Re8 6.Rde1 h4 
                       7.gxh4 Rfe7 8.R5e4 Nd7 (99.068.195) 14272 

16.01  0:15   +0.20    1.h5 gxh5 2.Bh3 Kh8 3.Qb2 Re8 4.Ne6 Qe7 
                       5.Qxe5+ Qf6 6.Qxf6+ Nxf6 7.Ng5 Rfe7 
                       8.Rxe7 Rxe7 (224.482.656) 14279 

17.01  0:24   +0.07    1.h5 gxh5 2.Bh3 Kh8 3.Qb2 Re8 4.Ne6 Qe7 
                       5.Qxe5+ Qf6 6.Qxf6+ Nxf6 7.Ng5 Rfe7 
                       8.Rxe7 Rxe7 (358.335.985) 14338 

18.01  0:58   +0.28    1.h5 gxh5 2.Bh3 Kh8 3.Qb2 Re8 4.Be6 Rg7 
                       5.Rxe5 Qe7 6.Qd4 Qf6 7.Ne4 Qf8 8.Rf5 (843.014.526) 14325 

19.01  1:35   +0.24    1.h5 gxh5 2.Bh3 Kh8 3.Qb2 Re8 4.Be6 Rf3 
                       5.Qxe5+ Qxe5 6.Rxe5 Nc7 7.Rde1 Nxe6 
                       8.Rxe6 Rxe6 (1.371.997.009) 14370 

best move: h4-h5 time: 2:00.838 min  n/s: 14.412.120  nodes: 1.741.589.434

Scorpio 2.4 JA 64-bit 4CPU finds it in 2 seconds.

Code: Select all

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -

Engine: Scorpio 2.4 JA 64-bit 4CPU (1024 MB)
by Daniel Shawul

13.00  0:01   +0.01    1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qd7 4.Ng5 Re7 
                       5.Bh3 Qd6 6.Ne4 Qb4 7.Qg5 Qxb3 
                       8.Qxg6+ Kh8 (12.559.767) 9587 

14.00  0:01   +0.01    1.h5 Qd6 2.hxg6 hxg6 3.Ne4 Qd7 4.Ng5 Re7 
                       5.Bh3 Qd6 6.Ne4 Qb4 7.Qg5 Qxb3 
                       8.Qxg6+ Kh8 (15.481.852) 9798 

14.00  0:02   +0.31    1.Bh3 (24.266.427) 10238 

14.00  0:02   +0.24    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Raf8 
                       5.Rxe5 Qc5+ 6.Qd4 Qxd4+ 7.Rxd4 Rd6 
                       8.Ne4 Rdd8 9.Be6+ Kg7 (25.268.096) 10271 

14.00  0:02   +0.24    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Raf8 
                       5.Rxe5 Qc5+ 6.Qd4 Qxd4+ 7.Rxd4 Rd6 
                       8.Ne4 Rdd8 9.Be6+ Kg7 (27.035.650) 10279 

15.00  0:06   +0.47    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Raf8 
                       5.Rxe5 Qc5+ 6.Qd4 Qc3 7.Ne4 Qxd4+ 
                       8.Rxd4 R6f7 9.Nd6 (71.864.623) 11124 

15.00  0:07   +0.47    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Raf8 
                       5.Rxe5 Qc5+ 6.Qd4 Qc3 7.Ne4 Qxd4+ 
                       8.Rxd4 R6f7 9.Nd6 (84.037.841) 11130 

16.00  0:09   +0.36    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 
                       5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 
                       8.Be6+ Kh8 9.Bxd5 Nxd5 10.Qd3 (109.599.926) 11218 

16.00  0:17   +0.36    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 
                       5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 
                       8.Be6+ Kh8 9.Bxd5 Nxd5 10.Qd3 (193.011.997) 11260 

17.00  0:20   +0.31    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 
                       5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 
                       8.Re6 Qf7 9.Qd4 f3 10.Rde1 (233.608.697) 11312 

17.00  0:24   +0.31    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 
                       5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 
                       8.Re6 Qf7 9.Qd4 f3 10.Rde1 (281.698.566) 11326 

best move: Bg2-h3 time: 0:30.951 min  n/s: 11.326.842  nodes: 281.698.566

Crafty 23.1 64-bit 4CPU finds it in 10 seconds.

Code: Select all

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -

Engine: Crafty 23.1 JA 64-bit 4CPU (1024 MB)
by Robert Hyatt

13.00  0:01   +0.19    1.h5 Qd6 2.Ne4 Qd7 3.f3 Rg7 4.h6 Re7 
                       5.Qc1 Rf7 6.Qc5 Kh8 7.Re2 (25.549.271) 17380 

13.00  0:01   +0.19    1.h5 Qd6 2.Ne4 Qd7 3.f3 Rg7 4.h6 Re7 
                       5.Qc1 Rf7 6.Qc5 Kh8 7.Re2 (26.918.029) 17593 

14.00  0:01   +0.20    1.h5 Qd6 2.Ne4 Qd7 3.f3 Rg7 4.h6 Rf7 
                       5.Ng5 Re7 6.Bh3 Qd6 7.Qc3 Nxc3 
                       8.Rxd6 (30.185.697) 17756 

14.00  0:02   +0.20    1.h5 Qd6 2.Ne4 Qd7 3.f3 Rg7 4.h6 Rf7 
                       5.Ng5 Re7 6.Bh3 Qd6 7.Qc3 Nxc3 
                       8.Rxd6 (38.818.735) 17888 

15.00  0:03   +0.19    1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 
                       4.Rxe5 h4 5.gxh4 Kh8 6.Rg5 Re7 7.Kh2 Rae8 
                       8.Bf3 Rg8 (64.353.987) 18762 

15.00  0:03   +0.19    1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 
                       4.Rxe5 h4 5.gxh4 Kh8 6.Rg5 Re7 7.Kh2 Rae8 
                       8.Bf3 Rg8 (72.536.801) 18889 

16.00  0:05   +0.22    1.h5 gxh5 2.Qg5+ Rg7 3.Qf5 Qe7 4.Ne6 Rf7 
                       5.Qxe5 Qf6 6.Rd2 Qxe5 7.Rxe5 Re8 
                       8.Be4 Kh8 9.f3 (96.641.039) 18949 

16.00  0:10   +0.29    1.Bh3 Re7 2.Qh6 Qd6 3.Ne4 Qb8 4.h5 Qf8 
                       5.Qg5 Qg7 6.hxg6 Qxg6 7.Bf5 Qxg5 
                       8.Nxg5 Kh8 9.Ne6 (206.999.835) 20038 

17.00  0:16   +0.44    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Nd7 
                       5.Bg2 Qc5+ 6.Kh2 exf4 7.gxf4 Qd6 
                       8.Bxd5+ cxd5 9.Qxd5+ Qxd5 10.Rxd5 Rd8 (346.983.228) 20483 

17.00  0:18   +0.44    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Nd7 
                       5.Bg2 Qc5+ 6.Kh2 exf4 7.gxf4 Qd6 
                       8.Bxd5+ cxd5 9.Qxd5+ Qxd5 10.Rxd5 Rd8 (375.447.422) 20549 

18.00  0:19   +0.55    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Nd7 
                       5.Bg2 Qc5+ 6.Kh2 exf4 7.gxf4 Qd6 
                       8.Bxd5+ cxd5 9.Qxd5+ Qxd5 10.Rxd5 Rd8 
                       11.Re7 (411.305.157) 20627 

18.00  0:22   +0.55    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Nd7 
                       5.Bg2 Qc5+ 6.Kh2 exf4 7.gxf4 Qd6 
                       8.Bxd5+ cxd5 9.Qxd5+ Qxd5 10.Rxd5 Rd8 
                       11.Re7 (458.049.931) 20716 

19.00  0:27   +0.51    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 
                       5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 
                       8.Re6 Qf8 9.Qf2 Qa3 10.Qf3 Rf8 11.g4 (577.373.324) 20858 

19.00  0:36   +0.51    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 
                       5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 
                       8.Re6 Qf8 9.Qf2 Qa3 10.Qf3 Rf8 11.g4 (754.945.635) 20930 

20.00  0:52   +0.37    1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 
                       5.Kh1 exf4 6.Ne4 Qe7 7.Nxf6+ Qxf6 
                       8.Re6 Qf8 9.Qf2 Qb4 10.Qf3 fxg3 
                       11.Qxg3 Rf8 (1.101.337.413) 21054 

best move: Bg2-h3 time: 1:01.074 min  n/s: 21.054.051  nodes: 1.101.337.413
Top
rlsuth
Posts: 322
Joined: Wed Mar 08, 2006 9:37 pm

Re: Interesting position I recently got from Swami

Post by rlsuth »

Nimzo 8 went with Bh3 after 14 seconds at depth 14.
Top
peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Interesting position I recently got from Swami

Post by peter »

Dann Corbit wrote: I am wondering if any engine sees it before ply 19.
r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - - 0 1

Analysis by Deep Shredder 12 UCI:

1.h5 De7 2.Se4 gxh5 3.Dh6 Tf5 4.Sd6
= (-0.24) Tiefe: 6/18 00:00:00 28kN
1.Db2 Te7 2.Lh3 Tae8 3.Dd2 Tf7 4.Dxa5
= (-0.05) Tiefe: 6/18 00:00:00 46kN
1.Db2 Te7 2.Lh3 Tae8 3.Dd2 Sb4 4.Dg5 S6d5
= (-0.12) Tiefe: 7/18 00:00:00 62kN
1.h5 De7 2.Sd3 Tf5 3.hxg6 hxg6 4.Dh6 Dg7 5.Dxg7+ Kxg7 6.Sxe5
= (0.14) Tiefe: 7/20 00:00:00 109kN
1.h5 De7 2.Sd3 Tf5 3.hxg6 hxg6 4.Dh6 Dg7 5.Dxg7+ Kxg7 6.Sxe5 Taf8
= (0.05) Tiefe: 8/22 00:00:00 180kN
1.h5 De7 2.Sd3 Tf5 3.hxg6 hxg6 4.Dh6 Dg7 5.Dxg7+ Kxg7 6.Sxe5 Th5 7.f4
= (0.24) Tiefe: 9/22 00:00:00 290kN
1.h5 De7 2.Sd3 Sd7 3.Lh3 Df6 4.Lxd7 Txd7 5.hxg6 hxg6 6.Sxe5 Th7 7.f4 Df5 8.Dg2
+/= (0.37) Tiefe: 10/28 00:00:00 498kN
1.h5 De7 2.Sd3 Sd7 3.hxg6 hxg6 4.Db2 Te8 5.Lxd5 cxd5 6.Sf4 g5 7.Sxd5 Dc5 8.Te3 g4
+/= (0.40) Tiefe: 11/28 00:00:00 708kN
1.h5 Dd6 2.hxg6 hxg6 3.Se4 Df8
= (0.25) Tiefe: 12/34 00:00:01 2334kN
1.h5 Dd6 2.hxg6 hxg6 3.Se4 Df8 4.Lh3 Te7 5.Tc1 Dg7 6.Tc5 Tf8 7.Txa5 Tf3 8.Dd1 Tef7 9.Le6
+/= (0.37) Tiefe: 13/28 00:00:01 3202kN
1.h5 Dd6 2.hxg6 hxg6 3.Se4 Df8 4.Lh3 Te7 5.Tc1 Dg7 6.Tc5 Sb4 7.Dd6 S6d5 8.Txa5 Txa5 9.Dd8+ Df8 10.Dxa5
+/= (0.38) Tiefe: 14/35 00:00:02 4393kN
1.h5 Dd6 2.hxg6 hxg6 3.Se4 Df8 4.Sc3 Sxc3 5.Dxc3 Dg7 6.Dxe5 Dxe5 7.Txe5 Td7 8.Tde1 Td3 9.Te7 Tb8 10.T1e3 Txe3 11.fxe3
+/= (0.41) Tiefe: 15/36 00:00:04 7805kN
1.h5 gxh5 2.Dg5+ Tg7 3.Dxh5 De7 4.Sd3 Tg5 5.Dh4 Dg7 6.Tc1 Kh8 7.Dh3 Tf8 8.Tc5 Ta8 9.Lxd5 cxd5
= (0.13) Tiefe: 16/40 00:00:25 44474kN
1.Lh3 Dd6 2.Se4 De7 3.Sg5 Tf6 4.Db2 Te8 5.f4 Sd7 6.Lxd7 Dxd7 7.Txe5 Tf5 8.Te2 Txe2 9.Dxe2 b6 10.Se6 Tf6
= (0.20) Tiefe: 16/40 00:00:28 51500kN
1.Lh3 Dd6 2.Se4 De7 3.Sg5 Tf6 4.Db2 Te8 5.f4 Sd7 6.Lxd7 Dxd7 7.Txe5 Tf5 8.Te2 Txe2 9.Dxe2 Dd6 10.Tc1 Tf8 11.Tc4 Df6 12.Se4
= (0.16) Tiefe: 17/36 00:00:39 69533kN
1.Lh3 Dd6 2.Se4 De7 3.Sg5 Tf6 4.Db2 Te8 5.f4 Sd7 6.Lxd7 Dxd7 7.Txe5 Tf5 8.Txe8+ Dxe8 9.Dd2 Dd8 10.Se6 Db6+ 11.Dd4 Dxd4+ 12.Txd4 Tf6
= (0.12) Tiefe: 18/41 00:00:56 101mN
1.Lh3 Dd6 2.Se4 De7 3.Sg5 Tf6 4.Db2 Te8 5.f4 Sd7 6.Lxd7 Dxd7 7.Txe5 Tf5 8.Txe8+ Dxe8 9.Dd2 b6 10.Te1 Dd7 11.Se6 Tf6 12.De2
= (0.25) Tiefe: 19/45 00:01:49 196mN
1.Lh3 Dd6 2.Se4 De7 3.Sg5 Tf6 4.Te2 Td6 5.Tde1 Sb4 6.Dc3 Sd3 7.Le6+ Txe6 8.Dxd3 Td6 9.Dc3 Sd7 10.Sf3 Td5 11.Sxe5 Sxe5 12.Txe5
= (0.20) Tiefe: 20/51 00:02:41 291mN
1.Lh3 Dd6 2.Se4 De7 3.Sg5 Tf6 4.Te2 Taf8 5.Dxa5 h6 6.Se4 Tf3 7.Tb2 Da3 8.Tdb1 Kh7 9.Lg4 T3f7 10.h5 g5 11.Te2 Ta8 12.De1 Te8 13.Lh3 Sd7 14.Tc2
+/= (0.31) Tiefe: 21/52 00:04:03 443mN

4x2,5GHz Intel, 1024 Mb hash.
Peter.
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User avatar
M ANSARI
Posts: 3707
Joined: Thu Mar 16, 2006 7:10 pm

Re: h5,Bh3,h5,Rc1,h5,Bh3

Post by M ANSARI »

zullil wrote:
M ANSARI wrote:Just fresh out of the oven Stockfish 1.6.3 with seemingly vastly improved MP scaling.
On an 8-core machine, the default value for the Minimum Split Depth parameter is now set at 7. Previously it was 4. In my testing, 7 yielded much better performance than 4, at least on my 8-core Mac Pro.

You can easily test if this change is responsible for the improvement you are seeing. Just set the parameter to 4 and see how much the performance drops. :)
I don't think so ... it seems to show 100% CPU usage on all 8 cores. With only 7 cores it would be showing something like 88% or so.
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rlsuth
Posts: 322
Joined: Wed Mar 08, 2006 9:37 pm

Re: Interesting position I recently got from Swami

Post by rlsuth »

rlsuth wrote:Nimzo 8 went with Bh3 after 14 seconds at depth 14.

In rerunning it to grab the analysis, it was actually much faster to go to Bh3 than I thought. Sometimes the old, stupid programs are better :).

Analysis by Nimzo 8:

1.Ne6 Qd6 2.Bh3 Qa3
-/+ (-0.88) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 5/17 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 5/17 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 5/17 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 5/17 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 6/19 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 7/20 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 8/22 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 9/23 00:00:00
1.Bh3 Re7 2.Be6+ Kg7 3.Qb2 Kf6 4.Bh3 Rae8 5.f4 h5 6.Kh2
= (-0.04) Depth: 10/25 00:00:06 20637kN
1.Bh3 Re7 2.Qh6 Qd6 3.Ne4 Qb8 4.Ng5 Kh8 5.f4 Nf6 6.h5
= (-0.01) Depth: 11/26 00:00:14 49441kN
1.Bh3
= (0.24) Depth: 12/28 00:01:16 272mN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 5.Kh1 Qa3 6.fxe5
+/= (0.27) Depth: 12/28 00:01:45 377mN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 5.Kh1 exf4 6.Ne4
= (0.03) Depth: 13/29 00:02:56 631mN
1.Bh3 Re7 2.h5 Kh8 3.hxg6 Qd6 4.Nd3 hxg6 5.Qb2 Nd7 6.Bxd7
+/= (0.26) Depth: 14/31 00:07:38 1659mN
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M ANSARI
Posts: 3707
Joined: Thu Mar 16, 2006 7:10 pm

Re: Interesting position I recently got from Swami

Post by M ANSARI »

rlsuth wrote:
rlsuth wrote:Nimzo 8 went with Bh3 after 14 seconds at depth 14.

In rerunning it to grab the analysis, it was actually much faster to go to Bh3 than I thought. Sometimes the old, stupid programs are better :).

Analysis by Nimzo 8:

1.Ne6 Qd6 2.Bh3 Qa3
-/+ (-0.88) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 3/14 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 5/17 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 5/17 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 5/17 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 5/17 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 6/19 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 7/20 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 8/22 00:00:00
1.Bh3 Re7
=/+ (-0.27) Depth: 9/23 00:00:00
1.Bh3 Re7 2.Be6+ Kg7 3.Qb2 Kf6 4.Bh3 Rae8 5.f4 h5 6.Kh2
= (-0.04) Depth: 10/25 00:00:06 20637kN
1.Bh3 Re7 2.Qh6 Qd6 3.Ne4 Qb8 4.Ng5 Kh8 5.f4 Nf6 6.h5
= (-0.01) Depth: 11/26 00:00:14 49441kN
1.Bh3
= (0.24) Depth: 12/28 00:01:16 272mN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 5.Kh1 Qa3 6.fxe5
+/= (0.27) Depth: 12/28 00:01:45 377mN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.f4 Qc5+ 5.Kh1 exf4 6.Ne4
= (0.03) Depth: 13/29 00:02:56 631mN
1.Bh3 Re7 2.h5 Kh8 3.hxg6 Qd6 4.Nd3 hxg6 5.Qb2 Nd7 6.Bxd7
+/= (0.26) Depth: 14/31 00:07:38 1659mN

You have to clear hash before you re-run analysis. Otherwise the result uses the older pre-calculated data and thus gives results much quicker.
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rlsuth
Posts: 322
Joined: Wed Mar 08, 2006 9:37 pm

Re: Interesting position I recently got from Swami

Post by rlsuth »

M ANSARI wrote: You have to clear hash before you re-run analysis. Otherwise the result uses the older pre-calculated data and thus gives results much quicker.


This was with hash tables cleared.

.
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