test position

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jdart
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test position

Post by jdart »

from an offline test game:

[d] r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2/q1pBPN1P/5PP1/2R3K1 w - -

bm is Qxd7 (much better than e4, which is typically the choice at lower depths).

Commercials have little trouble with this (Rybka 3 solves it at depth 15, 86 seconds, on my older dual). Arasan can find it, but not at all rapidly.

--Jon
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perejaslav
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Re: test position

Post by perejaslav »

1. Qxd7 {(0:00.03) 6285kN}{[%eval 131,13,HIARCS 12.1 MP]} *
Only 3 sec. for HIARCS on Quad :lol:
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bob
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Re: test position

Post by bob »

Takes Crafty just under a minute on my 2ghz laptop:

Code: Select all

               17    28.41   1.09   1. e4 dxe4 2. Bxe4 Nf8 3. Rc2 Kh8 4.
                                    Qb6 Qa4 5. Rc1 Nd7 6. Qd6 e5 7. Bxa8
                                    Rxa8 8. Bg3 e4 9. Qd5
               17    58.73     +1   1. Qxd7!!  (4.4Mnps)             
               17     1:10     +3   1. Qxd7!!  (4.4Mnps)             
               17     1:26   3.01   1. Qxd7 Qxc1+ 2. Kh2 Kh8 3. Ne5 fxe5
                                    4. Bxe5 Rg8 5. Qxe6 Qd1 6. Qf5 Qxd3
                                    7. Qxd3 Rgc8 8. Qc2 a5 9. Kg3 a4
               17->   1:27   3.01   1. Qxd7 Qxc1+ 2. Kh2 Kh8 3. Ne5 fxe5
                                    4. Bxe5 Rg8 5. Qxe6 Qd1 6. Qf5 Qxd3
                                    7. Qxd3 Rgc8 8. Qc2 a5 9. Kg3 a4 (s=2)
As far as Rybka's depth 15 goes, that could be an issue with how reductions affect this, or it could be a phony depth just as easily... No real way to know. Crafty finds it at depth 17 as you can see, which is a real depth.
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michiguel
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Re: test position

Post by michiguel »

bob wrote:Takes Crafty just under a minute on my 2ghz laptop:

Code: Select all

               17    28.41   1.09   1. e4 dxe4 2. Bxe4 Nf8 3. Rc2 Kh8 4.
                                    Qb6 Qa4 5. Rc1 Nd7 6. Qd6 e5 7. Bxa8
                                    Rxa8 8. Bg3 e4 9. Qd5
               17    58.73     +1   1. Qxd7!!  (4.4Mnps)             
               17     1:10     +3   1. Qxd7!!  (4.4Mnps)             
               17     1:26   3.01   1. Qxd7 Qxc1+ 2. Kh2 Kh8 3. Ne5 fxe5
                                    4. Bxe5 Rg8 5. Qxe6 Qd1 6. Qf5 Qxd3
                                    7. Qxd3 Rgc8 8. Qc2 a5 9. Kg3 a4
               17->   1:27   3.01   1. Qxd7 Qxc1+ 2. Kh2 Kh8 3. Ne5 fxe5
                                    4. Bxe5 Rg8 5. Qxe6 Qd1 6. Qf5 Qxd3
                                    7. Qxd3 Rgc8 8. Qc2 a5 9. Kg3 a4 (s=2)
As far as Rybka's depth 15 goes, that could be an issue with how reductions affect this, or it could be a phony depth just as easily... No real way to know. Crafty finds it at depth 17 as you can see, which is a real depth.
My primitive engine takes a long time (~2.6 hours) to find Qxd7 in an AMD 2.4 Ghz with a sub-optimal 32-bits compile (1 CPU), in 14 plies.
I do not think there is anything weird about finding the solution at 15 plies in this case.

Miguel

Code: Select all

 197435540  12:    570.9    +0.91  1.e4 dxe4 2.Bxe4 Nf8 3.Qxa8 Rxa8 4.Bxa8
                                   Ng6 5.Be3 Ne7 6.Bb7 Nd5
 399388196  13    1128.0    +0.67  1.e4 dxe4 2.Bxe4 Nf8 3.Re1 Ng6 4.Bg3 a5
                                   5.Kh1 Re8 6.Qxa8 Rxa8 7.Bxa8
 815611626  13:   2328.3    +0.67  1.e4 dxe4 2.Bxe4 Nf8 3.Re1 Ng6 4.Bg3 a5
                                   5.Kh1 Re8 6.Qxa8 Rxa8 7.Bxa8
1706706280  14    4791.5    +0.75  1.e4 dxe4 2.Bxe4 Nf8 3.Re1 Ng6 4.Bc1
                                   Qa4 5.Qb6 Rab8 6.Qxe6+ Kh8 7.Be3 Rc7
                                   8.Bd3
3312988072  14    9426.9      :-)  1.Qxd7
3757824611  14   10752.3      :-)  1.Qxd7
4129742944  14   11869.4    +2.11  1.Qxd7 Qxc1+ 2.Kh2 Rf8 3.Ne5 Rad8
                                   4.Qxe6+ Kh8 5.Bh6 fxe5 6.Qe7 Rg8
                                   7.Bxg7+ Rxg7 8.Qxd8+ Rg8 9.Qxd5 Qa3
                                   10.Qxe5+ Rg7 11.Qb8+ Rg8 12.Qc7 Rg7
                                   13.Qc8+ Rg8 14.Qxa6 Qxa6 15.Bxa6
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beachknight
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Re: test position

Post by beachknight »

40: r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2 - Deep Fritz 11
r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2/q1pBPN1P/5PP1/2R3K1 w - - 0 1

Analysis by Deep Fritz 11:

1.e4 dxe4 2.Qxe4 Nf8 3.Qe2 g5 4.Be3 a5 5.h4 g4 6.Ne1 h5 7.Bf4 Qb2 8.Qe3
+/- (1.21) Depth: 18/37 00:00:16 114mN
1.Qxd7 Qxc1+ 2.Kh2 Rf8 3.Ne5 Rad8 4.Qxe6+ Kh8 5.Nf7+ Rxf7 6.Qxf7 Qd2 7.Qc7 Rg8 8.Bf5 Re8 9.Qc6 Rf8 10.Bd6
+- (1.64) Depth: 18/37 00:00:19 139mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rgc8 8.Qc2 a5 9.e4
+- (3.55) Depth: 19/36 00:00:24 174mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.Kg1 Rge8 10.Kf1 Re6 11.Ke2
+- (3.63) Depth: 20/35 00:00:29 206mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.Kg1 Rge8 10.Kf1 Re6 11.Ke2
+- (3.49) Depth: 21/38 00:00:36 260mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.Kg1 Rge8
+- (3.49) Depth: 22/40 00:00:49 359mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.Kg1 Rge8 10.Kf1
+- (3.55) Depth: 23/42 00:01:16 567mN

(, chessengines20 30.12.2008)
hi, merhaba, hallo HT
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beachknight
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Re: test position

Post by beachknight »

40: r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2 - Deep Fritz 11
r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2/q1pBPN1P/5PP1/2R3K1 w - - 0 1

Analysis by Naum 4:

1.e4 dxe4 2.Qxe4 Nf8 3.Rb1 Qa2 4.Bc2 f5 5.Qd3 Ng6 6.Bg3 Qc4 7.Qe3 Qa2 8.Qc1
+/- (1.09) Depth: 15/36 00:00:30 20793kN
1.e4 dxe4 2.Qxe4 Nf8 3.Rb1 Qa2 4.Bc2 f5 5.Qd3 Qc4 6.Qe3 Qa2 7.Qe2 Ng6 8.Bg3 a5
+/- (1.02) Depth: 16/42 00:00:30 32845kN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5
+- (2.69) Depth: 16/48 00:00:30 57554kN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.h4
+- (3.85) Depth: 17/62 00:00:34 115mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.h4 Rge8
+- (3.85) Depth: 18/46 00:00:39 131mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.h4 Rge8 10.h5
+- (3.85) Depth: 19/47 00:00:48 162mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.h4 Rgf8 10.Bd6 Rf6
+- (3.91) Depth: 20/60 00:01:19 274mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.h4 Rgf8 10.Bd6 Rf6 11.Bc5
+- (3.91) Depth: 21/53 00:01:57 410mN

(, chessengines20 30.12.2008)
hi, merhaba, hallo HT
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beachknight
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Re: test position

Post by beachknight »

40: r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2 - Deep Fritz 11
r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2/q1pBPN1P/5PP1/2R3K1 w - - 0 1

Analysis by Rybka 3:

1.e4 Nf8 2.exd5 Qb2 3.Qe7 exd5 4.Rb1 Re8 5.Qc5 Qa2 6.Qxc3 Rac8 7.Qa1
+/- (1.08) Depth: 13 00:00:06 1139kN
1.e4 dxe4 2.Bxe4[] Nf8
+/- (1.10) Depth: 14 00:00:11 1815kN
1.Qxd7
+/- (1.28 !) Depth: 14 00:00:12 2248kN
1.Qxd7
+- (1.48 !) Depth: 14 00:00:14 2403kN
1.Qxd7
+- (1.88 !) Depth: 14 00:00:14 2630kN
1.Qxd7
+- (2.68 !) Depth: 14 00:00:20 3622kN
1.Qxd7 Qxc1+ 2.Kh2[]
+- (2.70) Depth: 14 00:00:22 3980kN
1.Qxd7 Qxc1+ 2.Kh2[] Kh8 3.Ne5[] fxe5 4.Bxe5 Rg8 5.Qxe6[] Qd1 6.Qf5[] Qxd3[] 7.Qxd3[] Rac8 8.Qc2[] a5 9.Kg3 a4 10.Bd6 Rc4 11.Kf3 Ra8 12.Ba3 Rb8
+- (2.70) Depth: 15 00:00:25 4475kN
1.Qxd7
+- (2.90 !) Depth: 16 00:00:37 6486kN
1.Qxd7
+- (3.10 !) Depth: 16 00:00:49 8261kN
1.Qxd7
+- (3.50 !) Depth: 16 00:01:09 11992kN
1.Qxd7 Qxc1+ 2.Kh2[] Kh8 3.Ne5[] fxe5 4.Bxe5 Rg8 5.Qxe6[] Qd1 6.Qf5[] Qxd3 7.Qxd3[] Rac8 8.Qc2[] Rc6 9.h4 h6 10.f3 Rgc8 11.e4 dxe4 12.d5 Rc5 13.fxe4 a5 14.Kh3
+- (3.32) Depth: 16 00:01:11 12571kN

(, chessengines20 30.12.2008)
hi, merhaba, hallo HT
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beachknight
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Re: test position

Post by beachknight »

40: r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2 - Deep Fritz 11
r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2/q1pBPN1P/5PP1/2R3K1 w - - 0 1

Analysis by Zappa Mexico II:

1.e4 dxe4 2.Bxe4 Nf8 3.Rc2 Ng6 4.Bc1 Qd6 5.Rxc3 Rxc3 6.Qxa8+ Qf8 7.Qxf8+ Kxf8 8.Bd2 Rb3
+/- (1.02) Depth: 14/46 00:00:08 16258kN
1.e4 dxe4 2.Bxe4 Nf8 3.Rc2 Ng6 4.Bc1 Qd6 5.Rxc3 Rxc3 6.Qxa8+ Qf8 7.Qxf8+ Kxf8 8.Bd2 Rb3
+/- (1.02) Depth: 15/46 00:00:11 21998kN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd2 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.Bd6 Rc4 10.e4 dxe4 11.Bc5 Rb8 12.Qa2 Rcb4 13.Bxb4 axb4
+- (2.43) Depth: 15/49 00:00:28 54882kN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd2 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.Bd6 Rc4 10.e4 dxe4 11.Bc5 Rb8 12.Qa2 Rcb4 13.Bxb4 axb4
+- (2.43) Depth: 15/49 00:00:30 58917kN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd2 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.Bd6 Rc4 10.e4 dxe4 11.Bc5 Rb8 12.Qa2 Rcb4 13.Bxb4 axb4 14.Qc4 h6 15.d5 Kh7 16.Qxe4+ Kh8 17.Qc4 Kh7
+- (3.31) Depth: 16/51 00:01:03 122mN
1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5 4.Bxe5 Rg8 5.Qxe6 Qd2 6.Qf5 Qxd3 7.Qxd3 Rac8 8.Qc2 a5 9.Bd6 Rc4 10.e4 dxe4 11.Bc5 Rb8 12.Qa2 Rcb4 13.Bxb4 axb4 14.Qc4 h6 15.d5 Kh7 16.Qxe4+ Kh8 17.Qc4 Kh7
+- (3.31) Depth: 16/51 00:01:08 132mN

(, chessengines20 30.12.2008)
hi, merhaba, hallo HT
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bob
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Re: test position

Post by bob »

depth 14-15 is not unusual if it takes forever to get there, but if you quickly hit 20 plies, then finding it at 15 is unusual.
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rightrook
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Joined: Wed Mar 08, 2006 8:45 pm

Re: test position

Post by rightrook »

Hiarcs 11.2......12 seconds
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