Old Uri Test position

[kgburcham]

compare your program to Uri results using Junior 5. We have come a long way.
Not sure what year this was posted.

[d] r2q1rk1/ppp1b1pp/2n5/3p1p2/3Pn1b1/2PB4/PPQN1PPP/RNB1R1K1 b - - 0 1

"black won by Nxf2 Kxf2 Bh4+ g3 f4
I will try to give a more detailed analysis of this position but I remember that
black can win it against every defence of white
It is difficult even after f4 for programs to see that white is losing and
Junior5 after some hours in the position after f4 evaluates the position as 0.19 pawns advantage for white."

Uri

[Spock]

Naum 4 x64 finds Nxf2 on my quad

12/31 0:01 -0.74 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.h3 Bh5 5.Ne3 Ne7 6.b4 Rae8 7.Kf1 (3.292.129) 2813
13/28 0:01 -0.74 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.h3 Bh5 5.Ne3 Ne7 6.b4 Rae8 7.Kf1 Nc6 (3.826.201) 2853
14/35 0:05 -0.74 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.h3 Bh5 5.Ne3 Ne7 6.b4 Rae8 7.Kf1 Nc6 8.Bxe4 (15.815.916) 3129
15/36 0:07 -0.69 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.Ng3 Bh5 5.Be3 Bf7 6.Be2 b5 7.Bf3 Na5 8.Be2 (23.743.297) 3204
16/34 0:10 -0.59 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.Re3 Nf6 5.f3 f4 6.Re2 Bd7 7.Bd2 Rae8 8.Rae1 Rxe2 9.Rxe2 (33.623.751) 3295
17/45 0:29 -0.37 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.Re3 Nf6 5.Re6 Bxa3 6.bxa3 f4 7.Rxc6 bxc6 8.Bxf4 Bd1 9.Rxd1 Qxf4 (105.551.927) 3544
18/47 1:57 -0.86 1...Bd6 2.Nf1 Qh4 3.Re3 f4 4.Rxe4 dxe4 5.Bxe4 Kh8 6.h3 Bd7 7.Nbd2 Rae8 8.Nc4 Qg5 9.Qd3 Bf5 10.Nfd2 (418.676.588) 3560
19/42 2:09 -0.86 1...Bd6 2.Nf1 Qh4 3.Re3 f4 4.Rxe4 dxe4 5.Bxe4 Kh8 6.h3 Bd7 7.Nbd2 Rae8 8.Nc4 Qg5 9.Qd3 Bf5 10.Nfd2 Qg6 (462.846.654) 3583
20/60 7:45 -0.76 1...Bd6 2.Rf1 Qh4 3.f4 Rae8 4.Na3 Re6 5.Nf3 Bxf3 6.Rxf3 Bxa3 7.bxa3 Rh6 8.h3 Qe1+ 9.Bf1 Rg6 10.Bb2 Qh4 11.Bd3 (1.742.952.787) 3740
20/62 18:42 -1.81 1...Nxf2 2.Nf3 Nxd3 3.Qxd3 f4 4.b3 Bf5 5.Qf1 a6 6.Qf2 Rf7 7.Ba3 Bf6 8.Nbd2 Bd3 9.Re6 Qd7 10.Rae1 b6 11.Nh4 (4.155.276.181) 3702 TB:156
21/54 19:37 -1.80 1...Nxf2 2.Nf3 Nxd3 3.Qxd3 f4 4.b3 Bf5 5.Qf1 Qd7 6.Ba3 Bxa3 7.Nxa3 a6 8.Qf2 Qd6 9.b4 b5 10.Qe2 Be4 11.Ng5 (4.362.745.841) 3704 TB:156
22/56 21:48 -1.79 1...Nxf2 2.Nf3 Nxd3 3.Qxd3 f4 4.b3 Bf5 5.Qf1 a6 6.Qf2 Rf7 7.Ba3 Bf6 8.Nbd2 Bg4 9.Re2 Bh4 10.Qf1 Qf6 11.Qd1 b6 12.h3 (4.861.415.788) 3715 TB:156

[Spock]

And Rybka 3 MP x64 in a similar time:


9.00 0:00 -0.27 1...Bd6 2.g3 Ng5 3.Qb3 Ne7 4.Bf1 Rb8 5.c4 (95.078) 124
10.00 0:01 -0.27 1...Bd6 2.g3 Ng5 3.Qb3 Ne7 4.Bf1 Rb8 5.c4 (140.908) 126
11.00 0:01 -0.27 1...Bd6 2.g3 Ng5 3.Qb3 Ne7 4.Bf1 Rb8 5.c4 (204.644) 126
12.01 0:06 -0.47++ 1...Bd6 (845.564) 141
12.01 0:11 -0.32 1...Bd6 2.Nf1 Qh4 3.g3 (1.745.001) 149
13.01 0:14 -0.52++ 1...Bd6 (2.119.481) 150
13.01 0:21 -0.44 1...Bd6 2.Nf1 Qh4 3.Re3 Rf6 4.f3 Bxh2+ 5.Nxh2 Rh6 6.g3 Qxg3+ 7.Qg2 Qxg2+ 8.Kxg2 Bh3+ 9.Kg1 Rg6+ 10.Ng4 Bxg4 11.fxg4 Rxg4+ 12.Kh2 Rf8 13.Be2 Rg6 (2.994.240) 144
14.01 0:27 -0.43 1...Bd6 2.Nf1 Qh4 3.Re3 Rf6 4.f3 Bxh2+ 5.Nxh2 Rh6 6.g3 Qxg3+ 7.Qg2 Qxg2+ 8.Kxg2 Bh3+ 9.Kg1 Rg6+ 10.Ng4 Bxg4 11.fxg4 Rxg4+ 12.Kh2 Rf8 13.Be2 Rg6 14.Nd2 f4 (3.904.012) 144
15.01 0:52 -0.49 1...Bd6 2.Nf1 Qh4 3.Re3 Rae8 4.f3 Bh5 5.a4 f4 6.Re2 Nf6 7.Rxe8 Rxe8 8.Nbd2 Bf7 9.b4 a5 (7.434.840) 145
16.01 1:17 -0.43 1...Bd6 2.Nf1 Qh4 3.Re3 Rae8 4.f3 Bh5 5.Na3 a6 6.Nc4 dxc4 7.Bxc4+ Bf7 8.Bxf7+ Rxf7 9.fxe4 fxe4 10.g3 Qh3 11.Qe2 b5 12.Qg2 (10.622.278) 140
17.01 4:00 -0.63++ 1...Bd6 (35.343.681) 150
17.01 15:15 -0.70 1...Bd6 2.Nxe4 fxe4 3.Bf1 (131.725.985) 147
18.01 18:46 -0.70 1...Bd6 2.Nxe4 fxe4 3.Bf1 Rf5 4.g3 Qf6 5.Be3 Rf8 6.Bg2 a6 7.Rc1 Kh8 8.Rf1 Qg6 9.Nd2 Be2 10.Rfe1 Bd3 11.Qb3 (162.979.803) 148
18.07 20:00 -0.90++ 1...Nxf2 (176.968.771) 151
18.01 20:40 -1.10++ 1...Nxf2 (185.733.485) 153

[Spock]

Unfortunately my favourite Zappa does not see this move, even after an overnight run of more than 9 hours
9/37 0:00 -0.32 1...Bh5 2.f3 Bd6 3.Nf1 Qh4 4.g3 Nxg3 5.hxg3 Bxg3 (660.690) 1631
9/37 0:00 -0.32 1...Bh5 2.f3 Bd6 3.Nf1 Qh4 4.g3 Nxg3 5.hxg3 Bxg3 (867.702) 1688
10/37 0:00 -0.13 1...Bh5 2.f3 Bd6 3.g3 Ng5 4.Kg2 Qf6 5.Qb3 (1.147.525) 1751
10/37 0:01 -0.33 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Ne3 Ne7 5.Nxg4 Qxg4 (2.140.514) 1960
10/37 0:01 -0.33 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Ne3 Ne7 5.Nxg4 Qxg4 (2.582.020) 1971
11/37 0:01 -0.42 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Ne3 Ng5 5.Nd2 (3.307.901) 2001
11/37 0:01 -0.42 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Ne3 Ng5 5.Nd2 (3.949.152) 2025
12/37 0:02 -0.37 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Qb3 Bf3 5.Ne3 Rae8 (5.877.258) 2081
12/37 0:03 -0.37 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Qb3 Bf3 5.Ne3 Rae8 (8.087.688) 2116
13/39 0:07 -0.48 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Ne3 Ng5 5.Nd2 f4 6.Nxg4 Qxg4 7.f3 (15.273.457) 2035
13/39 0:08 -0.48 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Ne3 Ng5 5.Nd2 f4 6.Nxg4 Qxg4 7.f3 (17.479.898) 2026
14/43 0:17 -0.71 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Ne3 Ng5 5.Nd2 f4 6.Nxg4 Qxg4 7.f3 Qh5 8.g4 (34.929.794) 2044
14/43 0:18 -0.71 1...Bd6 2.Nf1 Qh4 3.g3 Qh3 4.Ne3 Ng5 5.Nd2 f4 6.Nxg4 Qxg4 7.f3 Qh5 8.g4 (37.406.031) 2047
15/49 0:54 -0.79 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.g3 Qh3 5.Qb3 Kh8 6.Nd2 Ne7 7.Bf1 Qh5 8.c4 (119.157.195) 2198
15/49 0:55 -0.79 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.g3 Qh3 5.Qb3 Kh8 6.Nd2 Ne7 7.Bf1 Qh5 8.c4 (123.257.798) 2202
16/51 1:53 -0.86 1...Bd6 2.Nf1 Qh4 3.Re3 f4 4.Bxe4 dxe4 5.Rxe4 Bf5 6.Qb3+ Kh8 7.g3 Qh3 8.Rxf4 Bxf4 9.Bxf4 (251.866.491) 2224
16/51 1:56 -0.86 1...Bd6 2.Nf1 Qh4 3.Re3 f4 4.Bxe4 dxe4 5.Rxe4 Bf5 6.Qb3+ Kh8 7.g3 Qh3 8.Rxf4 Bxf4 9.Bxf4 (257.822.439) 2220
17/53 3:25 -0.75 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.Re3 f4 5.Bxe4 dxe4 6.Rxe4 Bf5 7.g3 Qh3 8.Qb3+ Kh8 9.Rxf4 g5 10.Qxb7 (447.128.369) 2173
17/53 3:41 -0.75 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.Re3 f4 5.Bxe4 dxe4 6.Rxe4 Bf5 7.g3 Qh3 8.Qb3+ Kh8 9.Rxf4 g5 10.Qxb7 (482.702.550) 2181
18/55 5:08 -0.75 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.Re3 f4 5.Bxe4 dxe4 6.Rxe4 Bf5 7.g3 Qh3 8.Qb3+ Kh8 9.Rxf4 g5 10.Qxb7 (684.795.033) 2216
18/55 5:33 -0.75 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.Re3 f4 5.Bxe4 dxe4 6.Rxe4 Bf5 7.g3 Qh3 8.Qb3+ Kh8 9.Rxf4 g5 10.Qxb7 (740.846.566) 2223
19/57 20:57 -0.83 1...Bd6 2.Nf1 Qh4 3.a4 Rae8 4.Na3 a6 5.Re3 f4 6.Bxe4 dxe4 7.Rxe4 Rxe4 8.Qxe4 f3 9.Qd5+ Kh8 10.g3 Qh3 (2.739.236.848) 2177
19/57 21:51 -0.83 1...Bd6 2.Nf1 Qh4 3.a4 Rae8 4.Na3 a6 5.Re3 f4 6.Bxe4 dxe4 7.Rxe4 Rxe4 8.Qxe4 f3 9.Qd5+ Kh8 10.g3 Qh3 (2.854.755.862) 2176
20/59 45:55 -0.92 1...Bd6 2.Nxe4 fxe4 3.Bf1 Rf5 4.g3 Qf6 5.Be3 Rf8 6.Qd2 g5 7.Qc2 a6 8.a4 Nd8 9.h3 Bxg3 (6.066.045.275) 2201
20/59 47:48 -0.92 1...Bd6 2.Nxe4 fxe4 3.Bf1 Rf5 4.g3 Qf6 5.Be3 Rf8 6.Qd2 g5 7.Qc2 a6 8.a4 Nd8 9.h3 Bxg3 (6.320.274.290) 2203
21/61 122:26 -0.88 1...Bd6 2.Rf1 Qh4 3.f4 Rae8 4.Nf3 Bxf3 5.Rxf3 Re6 6.Rh3 Qe1+ 7.Bf1 Rfe8 8.Re3 Qh4 9.g3 Qg4 10.Bg2 (16.342.095.267) 2224
21/61 130:08 -0.88 1...Bd6 2.Rf1 Qh4 3.f4 Rae8 4.Nf3 Bxf3 5.Rxf3 Re6 6.Rh3 Qe1+ 7.Bf1 Rfe8 8.Re3 Qh4 9.g3 Qg4 10.Bg2 (17.381.997.025) 2225
22/63 165:41 -0.88 1...Bd6 2.Rf1 Qh4 3.f4 Rae8 4.Nf3 Bxf3 5.Rxf3 Re6 6.Rh3 Qe1+ 7.Bf1 Rfe8 8.Re3 Qh4 9.g3 Qh5 10.Qe2 Qg6 11.Qg2 Nf6 12.Qf3 (22.265.292.772) 2239
22/63 185:17 -0.88 1...Bd6 2.Rf1 Qh4 3.f4 Rae8 4.Nf3 Bxf3 5.Rxf3 Re6 6.Rh3 Qe1+ 7.Bf1 Rfe8 8.Re3 Qh4 9.g3 Qh5 10.Qe2 Qg6 11.Qg2 Nf6 12.Qf3 (24.935.311.864) 2242
best move: Be7-d6 time: 574:39.606 min n/s: 612.194 nodes: 48.424.433.746

[Uri Blass]

This position is from human-human game and the move was practically played on the board.

The winner was
Asher Alperovich

http://ratings.fide.com/card.phtml?event=2803275

[michiguel]

This position is from human-human game and the move was practically played on the board.

The winner was
Asher Alperovich

http://ratings.fide.com/card.phtml?event=2803275

This is a well known position... I think it was played long time ago.

Miguel

[Dann Corbit]

This position is from human-human game and the move was practically played on the board.

The winner was
Asher Alperovich

http://ratings.fide.com/card.phtml?event=2803275

This is a well known position... I think it was played long time ago.

Miguel

I have two games with that position:
[Event "Corr"]
[Site "?"]
[Date "1897.??.??"]
[Round "?"]
[White "Kugayevsky"]
[Black "Kmielevsky"]
[Result "0-1"]
[ECO "C42x"]
[Variation "Russian Game: Classical, Chigorin, 8...Bg4 9.c3"]
[Source "Chess Mail Ltd"]

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1
Bg4 9.c3 f5 10.Qc2 O-O 11.Nfd2 Nxf2 12.Rxe7 Bd1 0-1

[Event "PF-chB"]
[Site "Bellheim"]
[Date "1994.??.??"]
[Round "?"]
[White "Schulz-Knappe, Florian"]
[Black "Hoegerl, Gerd"]
[Result "0-1"]
[ECO "C42x"]
[Variation "Russian Game: Classical, Chigorin, 8...Bg4 9.c3"]
[Source "ChessBase"]

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c3
Bg4 9.Re1 f5 10.Qc2 O-O 11.Nfd2 Bd6 12.Nf1 Qh4 13.Bxe4 fxe4 0-1

[Uri Blass]

Here is the third game from some israeli newspaper(1990 is the year of the game)

[Event "120'/40+60'/20+60'/20"]
[Site "?"]
[Date "1990.07.14"]
[Round "?"]
[White "Denkan"]
[Black "Asher Alperovich"]
[Result "0-1"]
[ECO "C42"]
[PlyCount "64"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Bg4 8.
Re1 Be7 9. c3 f5 10. Qc2 O-O 11. Nfd2 Nxf2 12. Kxf2 Bh4+ 13. g3 f4 14. Kg2 fxg3
15. hxg3 Bh3+ 16. Kxh3 Bxg3 17. Bxh7+ Kh8 18. Nf3 Rxf3 19. Rh1 Bf4+ 20. Kg2
Qg5+ 21. Kxf3 Qg3+ 22. Ke2 Qg2+ 23. Ke1 Qxh1+ 24. Kf2 Qh2+ 25. Kf1 Qh1+ 26. Kf2
Qh2+ 27. Kf1 Qh1+ 28. Kf2 Qxc1 29. Qe2 Rf8 30. Kg2 Be3 31. Qh5 Qg1+ 32. Kh3
Qh1+ 0-1

same game with some comments

[Event "120'/40+60'/20+60'/20"]
[Site "?"]
[Date "1990.07.14"]
[Round "?"]
[White "Denkan"]
[Black "Asher Alperovich"]
[Result "0-1"]
[ECO "C42"]
[PlyCount "64"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Bg4 8.
Re1 Be7 9. c3 f5 10. Qc2 {(not the best and theory suugest 10.Nbd2 or 10.Qb3)}
O-O 11. Nfd2 {the losing move(Nbd2 is better)} Nxf2 12. Kxf2 Bh4+ 13. g3 f4 14.
Kg2 fxg3 15. hxg3 Bh3+ 16. Kxh3 Bxg3 17. Bxh7+ Kh8 18. Nf3 Rxf3 19. Rh1 Bf4+
20. Kg2 Qg5+ 21. Kxf3 Qg3+ 22. Ke2 Qg2+ 23. Ke1 Qxh1+ 24. Kf2 Qh2+ 25. Kf1 Qh1+
26. Kf2 Qh2+ 27. Kf1 Qh1+ {??black at time trouble did not see that white can
claim a draw by 3 time repetition} 28. Kf2 {white also missed the same thing}
Qxc1 {?(28...Bxc1 or 28...Rf8 could be better)} 29. Qe2 {?} (29. Qxc1 Bxc1 30.
Na3 Bxb2 31. Rh1 {and black is winning but it is not simple} g6 32. Nb5 Kg7)
29... Rf8 30. Kg2 Be3 31. Qh5 Qg1+ 32. Kh3 Qh1+ 0-1

[ernest]

And Rybka 3 MP x64 in a similar time:

Hi Ray,
Amazing! On my 1st try, with Core2 Duo @3GHz, 512MB hash, I had much more luck (depth 16 instead of your depth 18):
Analysis by Rybka 3 32-bit:
1...Bd6 2.Nf1 Qh4 3.Re3 Ne7 4.f3 Bh5 5.g3 Qf6 6.Na3 Ng5 7.f4 Ne4
=/+ (-0.42) Depth: 15 00:01:28 5092kN
1...Bd6 2.Nf1 Qh4 3.Re3 Ne7 4.f3 Bh5 5.Re2 Rae8 6.Qb3 c5 7.Qxb7 cxd4 8.cxd4 Qf6 9.Qb3 Rb8 10.Qa4 Rb4
=/+ (-0.41) Depth: 16 00:03:06 10737kN
1...Nxf2
=/+ (-0.62 !) Depth: 16 00:03:58 14570kN
1...Nxf2
-/+ (-0.82 !) Depth: 16 00:04:22 16621kN
1...Nxf2
-/+ (-1.22 !) Depth: 16 00:04:58 19522kN
1...Nxf2 2.Nf3 Nxd3 3.Qxd3 f4 4.Nbd2 Qd7 5.b4 Bf5 6.Qf1 a6 7.a4 b6 8.Bb2 Bf6
-+ (-1.41) Depth: 16 00:10:39 43582kN
1...Nxf2 2.Nf3 Nxd3 3.Qxd3 f4 4.Nbd2 Qd6 5.b4 Bf5 6.Qe2 Rae8 7.b5
-/+ (-1.38) Depth: 17 00:11:45 48178kN

[Spock]

Amazing indeed - I've never really understood the so called non-deterministic or whatever they call it nature of MP engines which means the analysis is different each time you run it. Hash size may also be a factor