[d]8/8/1RpB1pk1/2Pb2r1/p6p/P3r2P/1P1R2PK/8 b - - 0 35 bm Reg3!!
This move is from game Kasimdzhanov-Topalov, San-Luis 2005. It seems that black had to fight for a draw but the striking Reg3 turns the tables.
Which engine can find it?
Very hard Test position
Moderator: Ras
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GenoM
- Posts: 922
- Joined: Wed Mar 08, 2006 9:46 pm
- Location: Plovdiv, Bulgaria
- Full name: Evgenii Manev
Very hard Test position
take it easy 
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AdminX
- Posts: 6382
- Joined: Mon Mar 13, 2006 2:34 pm
- Location: Acworth, GA
Re: Very hard Test position
From the Core2Duo Laptop
8/8/1RpB1pk1/2Pb2r1/p6p/P3r2P/1P1R2PK/8 b - - 0 1
Analysis by 64-bit Deep Rybka 3:
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kg5 5.Kg1 Kh5 6.Re2 Rg5
+/= (0.43) Depth: 6 00:00:00 3kN
+/= (0.42) Depth: 12 00:00:00 45kN
1...Rf5 2.Rb4 Be4 3.Rdd4 Bd5 4.Rxh4 Re2 5.Rhg4+ Rg5 6.Rxg5+ Kxg5 7.Rg4+ Kh5 8.Rg3 Bc4 9.Bc7 Rxb2 10.Bd8 Rf2
+/= (0.35) Depth: 12 00:00:01 106kN
+/= (0.56) Depth: 14 00:00:03 239kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Bc7 Bb3 6.Re2 Rd5 7.Rf2 Kg6 8.Bb8 Rd3
+/= (0.39) Depth: 14 00:00:04 316kN
+/= (0.33) Depth: 18 00:00:23 1830kN
1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5 4.Kg1 Re5
= (0.13) Depth: 18 00:00:35 2778kN
=/+ (-0.35) Depth: 20 00:05:17 25259kN, tb=60
8/8/1RpB1pk1/2Pb2r1/p6p/P3r2P/1P1R2PK/8 b - - 0 1
Analysis by 64-bit Deep Rybka 3:
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kg5 5.Kg1 Kh5 6.Re2 Rg5
+/= (0.43) Depth: 6 00:00:00 3kN
+/= (0.42) Depth: 12 00:00:00 45kN
1...Rf5 2.Rb4 Be4 3.Rdd4 Bd5 4.Rxh4 Re2 5.Rhg4+ Rg5 6.Rxg5+ Kxg5 7.Rg4+ Kh5 8.Rg3 Bc4 9.Bc7 Rxb2 10.Bd8 Rf2
+/= (0.35) Depth: 12 00:00:01 106kN
+/= (0.56) Depth: 14 00:00:03 239kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Bc7 Bb3 6.Re2 Rd5 7.Rf2 Kg6 8.Bb8 Rd3
+/= (0.39) Depth: 14 00:00:04 316kN
+/= (0.33) Depth: 18 00:00:23 1830kN
1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5 4.Kg1 Re5
= (0.13) Depth: 18 00:00:35 2778kN
=/+ (-0.35) Depth: 20 00:05:17 25259kN, tb=60
"Good decisions come from experience, and experience comes from bad decisions."
__________________________________________________________________
Ted Summers
__________________________________________________________________
Ted Summers
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GenoM
- Posts: 922
- Joined: Wed Mar 08, 2006 9:46 pm
- Location: Plovdiv, Bulgaria
- Full name: Evgenii Manev
Re: Very hard Test position
Congrats to Rybka and Rajlich&Kauffman.
No other engine can find it, right?
It's very tough move... Engines didn't see it at all...
No other engine can find it, right?
It's very tough move... Engines didn't see it at all...
take it easy
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M ANSARI
- Posts: 3734
- Joined: Thu Mar 16, 2006 7:10 pm
Re: Very hard Test position
New game
8/8/1RpB1pk1/2Pb2r1/p6p/P3r2P/1P1R2PK/8 b - - 0 1
Analysis by Rybka 3 :
1...Re4 2.Ra6
² (0.40) Depth: 2 00:00:00
1...Re4 2.Ra6
² (0.40) Depth: 4 00:00:00
1...Re4 2.Rb4 Rxb4 3.axb4 Rf5
² (0.44) Depth: 6 00:00:00
1...Re4 2.Rb4 Rxb4 3.axb4 Rf5
² (0.44) Depth: 7 00:00:00 1kN
1...Re4 2.Rb4 Rxb4 3.axb4 Rf5
² (0.44) Depth: 7 00:00:00 1kN
1...Re4 2.Rb4 Rxb4 3.axb4 Bc4 4.Rc2 Bb3
² (0.44) Depth: 8 00:00:00 3kN
1...Re4 2.Rb4 Rxb4 3.axb4 Bc4 4.Rc2 Bb3
² (0.44) Depth: 9 00:00:00 3kN
1...Re4 2.Rb4 Rxb4 3.axb4 Bc4 4.Rc2 Bb3 5.Re2
² (0.44) Depth: 10 00:00:00 15kN
1...Re4 2.Rb4 Rxb4 3.axb4 Bc4 4.Rf2 Rf5 5.Rc2 Bd3
² (0.44) Depth: 11 00:00:00 22kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Kg1 Rg5 6.Re2
² (0.42) Depth: 12 00:00:00 43kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Kg1 Ke6 6.Re2+ Kf7 7.Bc7
² (0.39) Depth: 13 00:00:00 83kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Bc7 Ke6 6.Re2+ Kf7 7.Kg1 Rg5 8.Bf4
² (0.35) Depth: 14 00:00:01 180kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Bc7 Ke6 6.Re2+ Kf7 7.Kg1 Rg5 8.Bf4 Rg8
² (0.39) Depth: 15 00:00:02 416kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Bc7 Ba2 6.Bb8 Rd5 7.Rf2 Ke6 8.Re2+ Kf7 9.Bf4
² (0.36) Depth: 16 00:00:02 584kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Rc2 Bb3 6.Re2
² (0.35) Depth: 17 00:00:03 873kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Be6 5.Re2 Bc4 6.Re4 Bd5 7.Rd4 Rg5 8.g3 hxg3+
² (0.35) Depth: 18 00:00:04 1340kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Be6 5.Re2 Bc4 6.Re4 Bd5 7.Rd4 Rg5 8.g3 hxg3+
² (0.35) Depth: 19 00:00:10 2795kN
1...Reg3
= (0.15) Depth: 19 00:00:14 4049kN
1...Reg3
= (-0.05) Depth: 19 00:00:18 5281kN
1...Reg3 2.Bxg3 hxg3+
= (-0.15) Depth: 19 00:00:47 13181kN, tb=16
1...Reg3
³ (-0.35) Depth: 20 00:01:31 25500kN, tb=19
1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5 4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxg2 7.Rg8+ Kf7
³ (-0.49) Depth: 20 00:03:05 53618kN, tb=26
1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5 4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxg2 7.Rg8+ Kf7 8.Rxd5 Rh2+ 9.Kg1 cxd5 10.Rxg3 Rxb2 11.Rf3 Ke6 12.Rf4 Rb3 13.Rxa4 Rxh3 14.Ra8 d4 15.c6 Rc3 16.Rd8 Ke5
³ (-0.49) Depth: 21 00:03:15 56553kN, tb=26
1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5 4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxg2 7.Rg8+ Kf7 8.Rxd5 Rh2+ 9.Kg1 cxd5 10.Rxg3 Rxb2 11.Rf3 Ke6 12.Rf4 Rb3 13.Rxa4 Rxh3 14.Ra8 d4 15.c6 Rc3 16.Rd8 Ke5
³ (-0.49) Depth: 22 00:03:35 62879kN, tb=26
(, 10.08.2008)
8/8/1RpB1pk1/2Pb2r1/p6p/P3r2P/1P1R2PK/8 b - - 0 1
Analysis by Rybka 3 :
1...Re4 2.Ra6
² (0.40) Depth: 2 00:00:00
1...Re4 2.Ra6
² (0.40) Depth: 4 00:00:00
1...Re4 2.Rb4 Rxb4 3.axb4 Rf5
² (0.44) Depth: 6 00:00:00
1...Re4 2.Rb4 Rxb4 3.axb4 Rf5
² (0.44) Depth: 7 00:00:00 1kN
1...Re4 2.Rb4 Rxb4 3.axb4 Rf5
² (0.44) Depth: 7 00:00:00 1kN
1...Re4 2.Rb4 Rxb4 3.axb4 Bc4 4.Rc2 Bb3
² (0.44) Depth: 8 00:00:00 3kN
1...Re4 2.Rb4 Rxb4 3.axb4 Bc4 4.Rc2 Bb3
² (0.44) Depth: 9 00:00:00 3kN
1...Re4 2.Rb4 Rxb4 3.axb4 Bc4 4.Rc2 Bb3 5.Re2
² (0.44) Depth: 10 00:00:00 15kN
1...Re4 2.Rb4 Rxb4 3.axb4 Bc4 4.Rf2 Rf5 5.Rc2 Bd3
² (0.44) Depth: 11 00:00:00 22kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Kg1 Rg5 6.Re2
² (0.42) Depth: 12 00:00:00 43kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Kg1 Ke6 6.Re2+ Kf7 7.Bc7
² (0.39) Depth: 13 00:00:00 83kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Bc7 Ke6 6.Re2+ Kf7 7.Kg1 Rg5 8.Bf4
² (0.35) Depth: 14 00:00:01 180kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Bc7 Ke6 6.Re2+ Kf7 7.Kg1 Rg5 8.Bf4 Rg8
² (0.39) Depth: 15 00:00:02 416kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Bc7 Ba2 6.Bb8 Rd5 7.Rf2 Ke6 8.Re2+ Kf7 9.Bf4
² (0.36) Depth: 16 00:00:02 584kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Kf7 5.Rc2 Bb3 6.Re2
² (0.35) Depth: 17 00:00:03 873kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Be6 5.Re2 Bc4 6.Re4 Bd5 7.Rd4 Rg5 8.g3 hxg3+
² (0.35) Depth: 18 00:00:04 1340kN
1...Re4 2.Rb7 Rf5 3.Rb4 Rxb4 4.axb4 Be6 5.Re2 Bc4 6.Re4 Bd5 7.Rd4 Rg5 8.g3 hxg3+
² (0.35) Depth: 19 00:00:10 2795kN
1...Reg3
= (0.15) Depth: 19 00:00:14 4049kN
1...Reg3
= (-0.05) Depth: 19 00:00:18 5281kN
1...Reg3 2.Bxg3 hxg3+
= (-0.15) Depth: 19 00:00:47 13181kN, tb=16
1...Reg3
³ (-0.35) Depth: 20 00:01:31 25500kN, tb=19
1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5 4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxg2 7.Rg8+ Kf7
³ (-0.49) Depth: 20 00:03:05 53618kN, tb=26
1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5 4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxg2 7.Rg8+ Kf7 8.Rxd5 Rh2+ 9.Kg1 cxd5 10.Rxg3 Rxb2 11.Rf3 Ke6 12.Rf4 Rb3 13.Rxa4 Rxh3 14.Ra8 d4 15.c6 Rc3 16.Rd8 Ke5
³ (-0.49) Depth: 21 00:03:15 56553kN, tb=26
1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5 4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxg2 7.Rg8+ Kf7 8.Rxd5 Rh2+ 9.Kg1 cxd5 10.Rxg3 Rxb2 11.Rf3 Ke6 12.Rf4 Rb3 13.Rxa4 Rxh3 14.Ra8 d4 15.c6 Rc3 16.Rd8 Ke5
³ (-0.49) Depth: 22 00:03:35 62879kN, tb=26
(, 10.08.2008)
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Eelco de Groot
- Posts: 4698
- Joined: Sun Mar 12, 2006 2:40 am
- Full name: Eelco de Groot
Re: Very hard Test position
Hola, congratulations to Rajlich and Kaufman, but just because Rybka finds a move from Topalov, it doesn't necessarily follow that no other engines can find it alsoGenoM wrote:Congrats to Rybka and Rajlich&Kauffman.
No other engine can find it, right?
It's very tough move... Engines didn't see it at all...
Nor does it mean that Cheparinov used Rybka 3 to prepare this for Topalov's repertoire already in 2005 and is now working with Rybka 6 18 ply for Ancalagon in five best mode, with 4 ply deep checks in QSearch:
8/8/1RpB1pk1/2Pb2r1/p6p/P3r2P/1P1R2PK/8 b - -
Engine: Ancalagon 1.08 Testversion 002 (Athlon 2009 MHz, 256 MB)
by Tord Romstad
18 8:38 -0.90 1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5
4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxb2 7.Rd6+ Kf7
8.h4 Bxg2+ 9.Kg1 Be4 10.R6d2 Rxd2
11.Rxd2 Kg6 12.Rd8 Kh5 13.Rh8+ Kg6 (241.285.482) 464
18 8:38 -1.01 1...Re1 2.Bf4 Rf5 3.Rb4 Re4 4.Bd6 Rxb4
5.axb4 Bc4 6.Rd4 Bb5 7.Bf4 Kf7 8.Kg1 Ke6
9.Kf2 Rd5 10.Re4+ Kf5 11.Kf3 Rd3+
12.Be3 (241.285.482) 464
18 8:38 -1.25 1...Re4 2.Rb4 Kf5 3.g4+ hxg3+ 4.Bxg3 Rg7
5.h4 Rxb4 6.axb4 Rb7 7.Rd4 Bf7 8.Kh3 Bg6
9.Kg2 Bh5 10.Bd6 Ke6 11.Re4+ Kf5
12.Rf4+ Ke6 (241.285.482) 464
18 8:38 -1.66 1...Rf5 2.Rb4 Be4 3.Rdd4 Bd5 4.Rxa4 Re2
5.Rg4+ Rg5 6.Rxg5+ fxg5 7.Rg4 Rxb2
8.Bf4 Bb3 9.Rxg5+ Kf7 10.Rg4 Ra2
11.Rxh4 Rxa3 (241.285.482) 464
18 8:38 -1.88 1...Rh5 2.Rb4 Bb3 3.Rg4+ Kf7 4.Rf4 Re1
5.Rdf2 f5 6.Rb4 Rd1 7.Rb6 Bd5 8.Ra6 Kg6
9.Rxa4 Be4 10.Bf4 Rh7 (241.285.482) 464
_____________________________________________________________
19 19:31 -0.74 1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5
4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxb2 7.Rd6+ Kf7
8.Rg1 Rc2 9.Rd7+ Ke6 10.Ra7 f4
11.Rxa4 f3 12.Re1+ Re2 (532.566.219) 454
19 19:31 -1.01 1...Re1 2.Bf4 Rf5 3.Rb4 Re4 4.Bd6 Rxb4
5.axb4 Bc4 6.Rd4 Bb5 7.Bf4 Kf7 8.Kg1 Ke6
9.Kf2 Rd5 10.Re4+ Kf5 11.Kf3 Rd3+
12.Be3 (532.566.219) 454
19 19:31 -1.05 1...Re4 2.Rb4 Kf5 3.g4+ hxg3+ 4.Bxg3 Ke6
5.h4 Rgg4 6.Rxe4+ Bxe4 7.Kh3 f5 8.h5 Rg5
9.Rd6+ Kf7 10.h6 Rh5+ 11.Bh4 Kg8
12.Rd4 Rxh6 13.Rxa4 Kf7 14.Rd4 Rh8 (532.566.219) 454
19 19:31 -1.43 1...Rf5 2.Rb4 Be4 3.Rdd4 Bd5 4.Rxa4 Re2
5.Rg4+ Rg5 6.Rxg5+ fxg5 7.Rg4 Bf3
8.b4 Bxg4 9.hxg4 Rb2 10.Be5 Rb3
11.a4 Rxb4 12.a5 Rxg4 (532.566.219) 454
19 19:31 -2.19 1...Rh5 2.Rb4 Bb3 3.Rg4+ Kf7 4.Rf4 Re1
5.Rdf2 f5 6.Rb4 Rd1 7.Rb6 Bd5 8.Ra6 Kf6
9.Rxa4 Kg6 10.Ra7 Rg5 11.a4 (532.566.219) 454
_____________________________________________________________
20 53:03 -0.33 1...Reg3 2.Bxg3 hxg3+ 3.Kh1 Rf5
4.Rd1 Rf2 5.Rb8 f5 6.Rd8 Rxb2 7.Rd6+ Kf7
8.h4 Bxg2+ 9.Kg1 Be4 10.R6d2 Rb3
11.Ra1 Kg6 12.Rd8 f4 13.Rh8 f3
14.Rg8+ Kh5 (1.418.227.302) 445
20 53:03 -0.96 1...Re1 2.Bf4 Rf5 3.Rb4 Re4 4.Rxe4 Bxe4
5.Bd6 Rf1 6.Rd4 f5 7.Rd2 Kf6 8.Bc7 Rc1
9.Bd8+ Ke5 10.Be7 f4 11.Bd6+ Kf5
12.Rd4 Rb1 (1.418.227.302) 445
20 53:03 -1.11 1...Re4 2.Rb4 Kf5 3.g4+ hxg3+ 4.Bxg3 Ke6
5.h4 Rgg4 6.Rxe4+ Bxe4 7.Rd4 Bf3
8.Rd6+ Kf7 9.h5 Be4 10.Rd7+ Kg8
11.Ra7 Bd5 12.Kh3 Re4 13.h6 Be6+
14.Kg2 Re2+ (1.418.227.302) 445
20 53:03 -1.76 1...Rf5 2.Rb4 Be4 3.Rdd4 Bd5 4.Rxa4 Re2
5.Rxd5 Rxd5 6.Rg4+ Rg5 7.b4 Rxg4
8.hxg4 Rb2 9.a4 Rxb4 10.a5 Ra4
11.Bc7 Kg5 12.g3 Kxg4 13.gxh4 Ra2+
14.Kg1 (1.418.227.302) 445
20 53:03 -1.94 1...Rh5 2.Rb4 Bb3 3.Rg4+ Kf7 4.Rf4 Re1
5.Rdf2 Rh6 6.Rb4 Rh5 7.Rb6 Bd5 8.Ra6 Rh7
9.Ra7+ Kg6 10.Rxh7 Kxh7 11.Rf4 Re2
12.Rxh4+ Kg6 13.Rg4+ Kf5 14.Rf4+ Ke6 (1.418.227.302) 445
Eelco