Test position: Fridman-Naidistch (2013) - Very hard

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Albert Silver
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Test position: Fridman-Naidistch (2013) - Very hard

Post by Albert Silver »

In today's round at Baden-Baden, Naiditsch played an incredibly inspired attack in which both the first move and the key next move, can be very tough to find.

Move one:

[d]r1bq1r1k/pp4bp/3p4/4p1n1/3nP3/2NB2B1/PPN2PP1/R2Q1RK1 b - - 0 21

The first move of the attack is 1...Ndf3+!! Please note that 1...Ngf3+ is no good as engines see it only as a means to a draw. There is no transposition.

1...Ndf3+ 2.gxf3

[d]r1bq1r1k/pp4bp/3p4/4p1n1/4P3/2NB1PB1/PPN2P2/R2Q1RK1 b - - 0 22

1...Qd7!!
"Tactics are the bricks and sticks that make up a game, but positional play is the architectural blueprint."
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test position: Fridman-Naidistch (2013) - Very hard

Post by zullil »

[pgn]
[Event "GRENKE Chess Classic"]
[Site "?"]
[Date "2013.02.13"]
[Round "6"]
[White "Fridman, Daniel"]
[Black "Naiditsch, Arkadij"]
[Result "0-1"]
[ECO "E97"]
[PlyCount "90"]
[EventDate "2013.??.??"]
[WhiteClock "0:45:55"]
[BlackClock "0:45:43"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. Be3
Ng4 9. Bg5 f6 10. Bh4 g5 11. Bg3 Nh6 12. dxe5 fxe5 13. h3 Kh8 14. c5 g4 15.
hxg4 Bxg4 16. cxd6 cxd6 17. Nd2 Bc8 18. Nc4 Nd4 19. Ne3 Nf7 20. Nc2 Ng5 21. Bd3
Ndf3+ 22. gxf3 Qd7 23. Be2 Rf6 24. Nd5 Rh6 25. f4 Nh3+ 26. Kg2 exf4 27. Bh2 f3+
28. Bxf3 Ng5 29. Nf4 Rxh2+ 30. Kxh2 Be5 31. Kg2 Bxf4 32. Rh1 Qg7 33. Kf1 Be6
34. Nd4 Bc4+ 35. Be2 Nxe4 36. Bxc4 Nd2+ 37. Ke2 d5 38. Qc2 Re8+ 39. Kd1 Nxc4
40. Qc3 Re4 41. Nf5 Nxb2+ 42. Kc2 Re2+ 43. Kb3 Qxc3+ 44. Kxc3 Be5+ 45. Nd4 Re4
0-1
[/pgn]
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Laskos
Posts: 10948
Joined: Wed Jul 26, 2006 10:21 pm
Full name: Kai Laskos

Re: Test position: Fridman-Naidistch (2013) - Very hard

Post by Laskos »

Seems that Houdini 3 Tactical Mode sees something

Analysis by Houdini 3 Pro x64:

21...Ndf3+ 22.gxf3 Qd7 23.Be2 Rf6 24.Nd5 Rh6 25.f4 Nh3+ 26.Kg2 Nxf4+ 27.Kf3 Rh2 28.Rg1 Qh3 29.Ke3 Bh6 30.Bf3 Nxd5+ 31.Ke2 Nf4+ 32.Bxf4 Bxf4 33.Qxd6 Be6 34.Qe7 Bc4+ 35.Ke1 Qh6 36.Rd1 Qf8 37.Qxf8+ Rxf8 38.b3 Bf7 39.Rd7 Rh3 40.Bg4 Rc3 41.Ne3 Bxe3 42.fxe3 Rxe3+ 43.Kd2 Rxe4 44.Rxb7 a5 45.Bf5 Rf4 46.Bd3 Rf2+ 47.Ke3 Rxa2 48.Rg5 Rh2 49.Rxe5
= (-0.14) Depth: 25/70 00:10:30 4235mN
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yanquis1972
Posts: 1766
Joined: Wed Jun 03, 2009 12:14 am

Re: Test position: Fridman-Naidistch (2013) - Very hard

Post by yanquis1972 »

Analysis by HIARCS Paderborn 2007 MP:

21...Nxc2 22.Bxc2 Be6 23.Qh5 Bf7 24.Qh4 Bc4 25.Rfd1
+/= (0.48) Depth: 7/19 00:00:01 63kN
21...Nde6
+/= (0.47) Depth: 7/19 00:00:01 86kN
21...Nde6 22.Ne3 Nd4 23.Ncd5 Be6
+/= (0.42) Depth: 7/19 00:00:01 89kN
21...Nde6 22.Ne3 Nf4 23.Ncd5 Be6 24.Kh2 Nxd3 25.Qxd3
+/= (0.47) Depth: 8/21 00:00:01 146kN
21...Ndf3+
+/= (0.46) Depth: 8/21 00:00:01 176kN
21...Ndf3+
= (0.17 ++) Depth: 8/21 00:00:01 191kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 8/21 00:00:01 201kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 9/22 00:00:01 265kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 10/25 00:00:01 413kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 11/27 00:00:02 765kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 12/29 00:00:02 1491kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 13/33 00:00:03 3737kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 14/35 00:00:05 7471kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 15/40 00:00:07 14110kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 16/42 00:00:12 33070kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 17/43 00:00:23 74274kN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 18/45 00:01:01 210mN
21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+
= (0.00) Depth: 19/49 00:02:02 424mN
21...Ndf3+
= (-0.25 ++) Depth: 20/51 00:06:39 1367mN
21...Ndf3+ 22.gxf3 Qd7 23.Ne1 Rf6 24.Qa4 Qf7 25.Qa5 Be6 26.Be2 Rh6 27.f4 Nh3+ 28.Kh1 Nxf4+ 29.Kg1 b6 30.Qb5 Rg8 31.Ng2 Bd7
=/+ (-0.48) Depth: 20/51 00:07:13 1477mN
21...Ndf3+
= (-0.23 --) Depth: 21/54 00:13:10 2693mN
21...Ndf3+ 22.gxf3 Qd7 23.Be2 Rf6 24.Nd5 Rh6 25.f4 Nh3+ 26.Kg2 exf4 27.Nd4 Qf7 28.Nf5 Bxf5 29.exf5 fxg3 30.fxg3 Bxb2 31.Qd2 Bxa1 32.Qxh6 Qxd5+ 33.Bf3 Qxa2+ 34.Kxh3 Bg7 35.Qxd6 Qf7 36.Bd5
= (-0.10) Depth: 21/54 00:15:42 3230mN
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Ajedrecista
Posts: 2209
Joined: Wed Jul 13, 2011 9:04 pm
Location: Madrid, Spain.

Re: Test position: Fridman-Naidistch (2013) - very hard.

Post by Ajedrecista »

Hello Albert:
Albert Silver wrote:In today's round at Baden-Baden, Naiditsch played an incredibly inspired attack in which both the first move and the key next move, can be very tough to find.

Move one:

[d]r1bq1r1k/pp4bp/3p4/4p1n1/3nP3/2NB2B1/PPN2PP1/R2Q1RK1 b - - 0 21

The first move of the attack is 1...Ndf3+!! Please note that 1...Ngf3+ is no good as engines see it only as a means to a draw. There is no transposition.

1...Ndf3+ 2.gxf3

[d]r1bq1r1k/pp4bp/3p4/4p1n1/4P3/2NB1PB1/PPN2P2/R2Q1RK1 b - - 0 22

1...Qd7!!
Analysis by Hannibal 1.3 w32 (using two cores) in an Intel Pentium D930 (3 GHz), with 512 MB of hash, running under Arena 2.0.1 GUI:
FEN: r1bq1r1k/pp4bp/3p4/4p1n1/3nP3/2NB2B1/PPN2PP1/R2Q1RK1 w - - 0 21

Hannibal1.3x32:
8 00:00 49.655 397.240 -0,20 Qd8b6 Nc2xd4 Qb6xd4 Kg1h1 Bc8e6 Qd1d2 Bg7h6 Nc3b5 Qd4b6
9 00:01 143.722 460.647 0,00 Qd8b6 Nc2xd4 Qb6xd4 Kg1h2 Bc8e6 Kh2h1 Bg7f6 Qd1d2 a7a6 Bg3h4 Ra8c8
10 00:01 297.209 442.275 -0,09 Ng5e6 Qd1d2 Nd4xc2 Bd3xc2 Ne6d4 Bc2b3 Nd4xb3 a2xb3 Qd8b6 Kg1h1 Bc8e6
11 00:01 411.133 438.775 -0,01 Ng5e6 Qd1d2 Nd4xc2 Bd3xc2 Ne6d4 Bc2a4 Bc8e6 Nc3d5 b7b5 Ba4b3 Nd4xb3 a2xb3
12- 00:02 770.948 456.993 -0,17 Ng5e6 Nc2xd4 Ne6xd4 Qd1h5 Bc8e6 Nc3d5 Qd8a5 Rf1d1 Ra8c8 Qh5h2 Be6g4
12 00:03 1.069.562 468.900 -0,18 Ng5e6 Nc2xd4 Ne6xd4 Qd1h5 Bc8e6 Nc3d5 Qd8a5 Rf1d1 a7a6 Kg1h1 Be6f7 Qh5g4 Bf7e6
13 00:03 1.556.715 478.989 -0,18 Ng5e6 Nc2xd4 Ne6xd4 Qd1h5 Bc8e6 Nc3d5 Qd8a5 Rf1d1 Be6f7 Qh5h2 Ra8c8 f2f3 Qa5c5 Bg3f2
14 00:06 2.800.958 502.143 -0,23 Ng5e6 Nc2xd4 Ne6xd4 Qd1h5 Bc8e6 Nc3d5 Ra8c8 f2f3 Be6f7 Qh5h2 Qd8g5 Rf1d1 Bg7h6 Kg1h1 Bf7xd5 e4xd5
15 00:08 4.011.463 511.405 -0,23 Ng5e6 Nc2xd4 Ne6xd4 Qd1h5 Bc8e6 Nc3d5 Ra8c8 f2f3 Be6f7 Qh5h2 Qd8g5 Rf1d1 Bg7h6 Kg1h1 Bf7xd5 e4xd5
16 00:21 11.216.189 530.542 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
17 00:24 12.879.508 532.827 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
18 00:27 14.015.449 533.292 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
19 00:33 17.418.499 537.757 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
20 00:44 24.038.332 544.395 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
21 00:56 30.856.424 551.312 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
22 01:14 41.156.150 558.875 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
23 02:13 75.839.870 571.634 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
24 03:40 127.133.644 579.320 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
25 06:01 212.652.611 589.627 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
26 08:51 318.550.306 599.624 0,00 Nd4f3+ g2xf3 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
I stopped the analysis after nine minutes. Hannibal found 21.- ..., Ndf3+ very soon (at depth 16) but it does not evaluate it as winning.

------------------------

I cleared hash and then I tried 21.- ..., Ndf3+; 22.- gxf3:

[d]r1bq1r1k/pp4bp/3p4/4p1n1/4P3/2NB1PB1/PPN2P2/R2Q1RK1 b - - 0 22
FEN: r1bq1r1k/pp4bp/3p4/4p1n1/4P3/2NB1PB1/PPN2P2/R2Q1RK1 b - - 0 22

Hannibal1.3x32:
8- 00:00 39.687 422.202 -0,45 Ng5xf3+ Kg1g2 Qd8g5 Nc2e1 Nf3d2 Rf1h1 Bc8g4 Bd3e2 Bg4e6 Kg2g1
8- 00:00 64.609 411.522 -0,93 Ng5xf3+ Kg1g2 Qd8g5 Nc2e1 Nf3d4 Qd1c1 Qg5h5 Rf1h1 Qh5f7 Kg2g1 Bc8g4
8 00:01 376.688 438.009 -0,38 Ng5xf3+ Kg1g2 Qd8f6 Nc2e1 Nf3d4 Nc3e2 Bc8g4 Kg2h1 Qf6h6+ Bg3h2
9 00:01 447.101 414.366 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2h1 Qd8d7 Bg3xh4 Qd7h3+ Kh1g1 Qh3xh4 Nc2e3 Qh4g5+ Kg1h1 Qg5h6+ Kh1g1 Qh6g5+ Kg1h1
10- 00:01 481.717 416.350 -0,16 Ng5xf3+ Kg1g2 Nf3h4+ Kg2h1 Qd8d7 Nc2e1 Qd7h3+ Kh1g1 Bc8g4 Bd3e2 Bg4xe2 Nc3xe2
10 00:01 515.603 417.492 -0,49 Ng5xf3+ Kg1g2 Nf3h4+ Kg2h1 Qd8d7 Nc2e1 Qd7h3+ Kh1g1 Bc8e6 Bd3e2 Ra8d8 Bg3xh4 Qh3xh4 Ne1g2 Qh4h3 Qd1d3 Qh3h6 Ng2e3
11- 00:02 609.431 428.573 -0,65 Ng5xf3+ Kg1g2 Nf3h4+ Kg2h1 Qd8d7 Nc2e1 Qd7h3+ Kh1g1 Bc8e6 Bd3e2 Ra8d8 Bg3xh4 Qh3xh4 Ne1g2 Qh4h3 Qd1d3 Qh3h6 Qd3e3
11 00:02 686.270 430.533 -0,70 Ng5xf3+ Kg1g2 Nf3h4+ Kg2h1 Qd8d7 Nc2e1 Qd7h3+ Kh1g1 Bc8e6 Bd3e2 Rf8f6 Bg3xh4 Qh3xh4 Ne1g2 Qh4g5 Qd1c1 Qg5g6 Qc1e3 Bg7h6
12 00:02 805.344 436.737 -0,70 Ng5xf3+ Kg1g2 Nf3h4+ Kg2h1 Qd8d7 Nc2e1 Qd7h3+ Kh1g1 Bc8e6 Bd3e2 Rf8f6 Bg3xh4 Qh3xh4 Ne1g2 Qh4g5 Qd1c1 Qg5g6 Qc1e3 Bg7h6 Qe3g3
13 00:03 1.063.013 456.424 -0,57 Ng5xf3+ Kg1g2 Nf3h4+ Kg2h1 Qd8d7 Nc2e1 Qd7h3+ Kh1g1 Bc8e6 Bg3xh4 Qh3xh4 Ne1g2 Qh4g5 Qd1c1 Qg5g6 Qc1e3 Ra8c8 Nc3d5 Bg7h6 Qe3g3
14 00:04 2.037.577 482.952 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
15 00:05 2.292.246 488.960 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
16 00:07 3.209.776 498.567 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
17 00:09 4.591.337 509.243 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
18 00:13 6.566.957 520.155 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
19 00:17 9.063.575 533.622 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
20 00:23 12.115.764 538.837 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
21 00:32 17.639.404 548.813 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
22 00:51 28.424.897 556.663 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
23 01:31 51.154.572 566.119 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
24 02:27 84.180.905 573.205 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
25 03:48 133.322.205 584.826 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
26 20:00 715.189.916 596.006 0,00 Ng5xf3+ Kg1g2 Nf3h4+ Kg2g1 Nh4f3+ Kg1g2
I stopped the analysis after twenty minutes; 22.- ..., Qd7 was the move 32 out of 35 in the search but Hannibal has been analyzing it for more than fifteen minutes (until I stopped it due to lack of time). It looks like Hannibal found something, so I recommend to give a chance to Hannibal 1.3 in faster hardware with the last position.

Regards from Spain.

Ajedrecista.
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test position: Fridman-Naidistch (2013) - Very hard

Post by zullil »

Albert Silver wrote:
[d]r1bq1r1k/pp4bp/3p4/4p1n1/4P3/2NB1PB1/PPN2P2/R2Q1RK1 b - - 0 22

1...Qd7!!
Critter-1.6a switches to Qd7 quickly, but even after 90 minutes doesn't give a strong positive score:

Code: Select all

23/57  02:04    1205M   9711K  +0.07 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 exf4 Nd4 Qf7 Rc1 fxg3 fxg3 Nf2 Rxf2 Rh2+ Kxh2 Qxf2+ Kh1 Bxd4 Qf1 Qxf1+ Rxf1 Bd7 Rf7 Bc6 b3 Rg8 Kg2 Be5 g4 Rg6 Kf3 Kg8 Re7 Rg7 Bc4 Kf8 Re6 Rf7+ Ke3
24/59  02:24    1405M   9744K  +0.00 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 exf4 Nd4 Qf7 Rc1 fxg3 fxg3 Nf2 Rxf2 Rh2+ Kxh2 Qxf2+ Kh1 Bxd4 Qf1 Qxf1+ Rxf1 Bd7 Rf7 Bc6 b3 Rg8 Kg2 Be5 g4 Rg6 Kf3 Kg8 Rc7 Rg7 Rc8+ Kf7 Rc7+ Kg8
25/59  04:23    2687M  10196K  +0.00 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Qg4+ Ke3 Qg5 Bxf4 exf4+ Kd3 Rh3+ f3 Be6 Rg1 Qe5
26/60+ 07:28    4670M  10414K  +0.08 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Qg4+ Ke3 Qg5 Bxf4 exf4+ Kd3 Rh3+ f3 Be6 Nc7 Qe5 Rb1 Rc8 Nxe6 Qxe6 Kd2 Qxa2 Kc1 Rh2 Re1 Qb3 Qd2 Rg2 Rh1 Be5 Qd3 Qa2
26/68+ 18:28   11786M  10628K  +0.21 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Rh2 Ke3 Bh6 Bxf4 exf4+ Kd4 Qe8 a4 Bg7+ Kd3 Be6 Kd2 Bxd5 exd5 Bxb2 Rb1 Qe5 Rxb2 Qxb2 Bd3 Rc8 Qg4 Qc3+ Kc1 Rf8 Bf5 Qf6 Bd3 Qg7 Qxg7+ Kxg7 Nd4 Kf6 Ne6 Rc8+ Kb2 f3 Kb3
26/68  19:56   12724M  10633K  +0.00 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Rh2 Ke3 Bh6 Bxf4 exf4+ Kd4 Qc6 Rh1 Bf5 Ncb4 Qc5+ Kd3 Bg7 exf5 Qd4+ Kc2 Qxb2+ Kd3 Rc8 f6 Bxf6 Nxf6 Rxh1
27/68  23:12   14920M  10717K  +0.00 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Rh2 Ke3 Bh6 Bxf4 exf4+ Kd4 Qc6 Rh1 Bf5 Ncb4 Qc5+ Kd3 Bg7 exf5 Qd4+ Kc2 Qxb2+ Kd3 Rc8 f6 Bxf6 Nxf6 Rxh1 Qxh1 Rc3+ Ke4 Qxe2+ Kf5 Qe5+ Kg4 Qxf6 Qxb7 Qe6+
28/69+ 29:31   19241M  10864K  +0.09 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Rh2 Ke3 Bh6 Bxf4 exf4+ Kd4 Qc6 Rh1 Bf5 Ncb4 Qc5+ Kd3 Bg7 exf5 Qd4+ Kc2 Qxb2+ Kd3 Rc8 f6 Bxf6 Nxf6 Rxh1 Qxh1 Rc3+ Ke4 Qxe2+ Kf5 Qe5+ Kg4 Qxf6 f3 Kg7 Rg1 Qg6+ Kh3
28/78+ 43:38   28256M  10789K  +0.22 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Rh2 Ke3 Bh6 Bxf4 exf4+ Kd4 Qc6 Rh1 Bf5 Ncb4 Qc5+ Kd3 Bg7 exf5 Qd4+ Kc2 Qxb2+ Kd3 Rc8 f6 Bxf6 Nxf6 Rxh1 Qxh1 Rc3+ Ke4 Qxe2+ Kf5 Qe5+ Kg4 Qxf6 Qh5 Rc5 Qe8+ Kg7 Qd7+ Kf8 Rd1 Qg6+ Kf3 Rc3+ Ke2 Qe4+ Kd2 Qxb4 Qf5+ Kg7 Qg5+ Kf7 Qf5+ Kg7
28/78  51:16   33253M  10810K  +0.18 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Rh2 Ke3 Bh6 Kd2 Nxd5+ Ke1 Nf4 Ne3 Rh3 Bxf4 Bxf4 Bg4 Qg7 Nf5 Bxf5 Bxf5 Rh2 Qxd6 Rg8 Rd1 Be3 Ke2 Bxf2 Rxf2 Rxf2+ Kxf2 Qg3+ Ke2 Qh2+ Kd3 Rg3+ Kc4 Qc2+
29/78+ 78:17   50942M  10844K  +0.27 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Rh2 Ke3 Bh6 Kd2 Nxd5+ Ke1 Nf4 Ne3 Rh3 Bxf4 Bxf4 Bg4 Qg7 Nf5 Bxf5 Bxf5 Rh2 Qxd6 Rg8 Rd1 Be3 Ke2 Bxf2 Rxf2 Rxf2+ Kxf2 Qg3+ Ke2 Qh2+ Kd3 Rg3+ Kc4 Qc2+
29/78  97:30   64066M  10949K  +0.26 Qd7 Be2 Rf6 Nd5 Rh6 f4 Nh3+ Kg2 Nxf4+ Kf3 Rh2 Ke3 Bh6 Kd2 Nxd5+ Ke1 Nf4 Ne3 Rh3 Bxf4 Bxf4 Bg4 Qg7 Nf5 Bxf5 Bxf5 Rh6 Qb3 Qc7 Ke2 d5 Rh1 Rf8 Rxh6 Bxh6 Qxd5 Rd8 Qb3 Bc1 Kf1 Rd2 Qc3 Qxc3 bxc3 Bb2 Rb1 Kg7 Kg2 h6 c4 Kf6 c5
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Posts: 4702
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test position: Fridman-Naidistch (2013) - Very hard

Post by Eelco de Groot »

Laskos wrote:Seems that Houdini 3 Tactical Mode sees something

Analysis by Houdini 3 Pro x64:

21...Ndf3+ 22.gxf3 Qd7 23.Be2 Rf6 24.Nd5 Rh6 25.f4 Nh3+ 26.Kg2 Nxf4+ 27.Kf3 Rh2 28.Rg1 Qh3 29.Ke3 Bh6 30.Bf3 Nxd5+ 31.Ke2 Nf4+ 32.Bxf4 Bxf4 33.Qxd6 Be6 34.Qe7 Bc4+ 35.Ke1 Qh6 36.Rd1 Qf8 37.Qxf8+ Rxf8 38.b3 Bf7 39.Rd7 Rh3 40.Bg4 Rc3 41.Ne3 Bxe3 42.fxe3 Rxe3+ 43.Kd2 Rxe4 44.Rxb7 a5 45.Bf5 Rf4 46.Bd3 Rf2+ 47.Ke3 Rxa2 48.Rg5 Rh2 49.Rxe5
= (-0.14) Depth: 25/70 00:10:30 4235mN
Considering the eval, it's not very impressive, I would have called it sooner à la Thorsten: "Houdini 3 Tactical Mode is displaying its Fritzy draw evals again, whereas Stockfish is almost as good as CSTAL or Rebel".

I have not actually tried any of the programs mentioned there by my Thorsten impersonation, Rebel, Houdini or Cstal (I don't have a copy, sad to say) but I think this looks like a typical Rebel position. I think it could find it :) Here is Stockfish 2.3.1 (well, the eval is almost pure Stockfish 2.3.1 so I think Stockfish 2.3.1 would also find it)

On an by now almost ancient single thread Athlon AMD processor:

r1bq1r1k/pp4bp/3p4/4p1n1/3nP3/2NB2B1/PPN2PP1/R2Q1RK1 b - -

Engine: Stockfish 2.3.1 'Hybrid, Chessbase Open Source Release candidate 142 :) ' (Athlon 2009 MHz, 256 MB)
by Tord Romstad, Marco Costalba and Joona Kiiski

1/01 0:00 +0.28 21...Qf6 22.Nxd4 exd4 (238) 238

2/02 0:00 -0.28 21...Be6 22.Nxd4 exd4 (643) 643

3/05 0:00 -0.56 21...Qf6 22.Nxd4 exd4 23.Nd5 (3.996) 249

4/05 0:00 -0.52 21...Qf6 22.f4 exf4 23.Rxf4 (5.558) 347

5/07 0:00 -0.60 21...Qf6 22.f4 exf4 23.Rxf4 Qe7 (8.526) 532

6/08 0:00 -0.92 21...Qb6 22.Nxd4 Qxd4 23.Kh1 Be6
24.Rc1 (16.844) 526

7/12 0:00 +0.52 21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Qf6
24.Rh1 Bg4 25.Ne3 Be6 (27.783) 441

8/19 0:00 0.00 21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+
24.Kh1 Qd7 25.Bxh4 Qh3+ 26.Kg1 Qxh4
27.Ne3 Qg5+ 28.Kh1 Qh6+ 29.Kg2 Qg5+
30.Kh1 (69.649) 493

9/19 0:00 0.00 21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+
24.Kh1 Qd7 25.Bxh4 Qh3+ 26.Kg1 Qxh4
27.Ne3 Qg5+ 28.Kh1 Qh6+ 29.Kg2 Qg5+
30.Kh1 (83.822) 484
.
.
.
.
25/32 2:16 0.00 21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+
24.Kg1 Nf3+ (70.603.696) 517

26/32 3:50 0.00 21...Ndf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+
24.Kg1 Nf3+ (118.280.821) 513

27/32 5:42 +0.08++ 21...Ndf3+ 22.gxf3 Qd7 23.Bb5 Qh3
24.Be2 Rf6 25.Bxe5 Rh6 26.Bxg7+ Kxg7
27.Qd4+ Kg8 28.Bc4+ Be6 29.Be2 Nxf3+
30.Bxf3 (173.202.542) 505

27/32 5:47 +0.16++ 21...Ndf3+ 22.gxf3 Qd7 23.Bb5 Qh3
24.Be2 Rf6 25.Bxe5 Rh6 26.Bxg7+ Kxg7
27.Qd4+ Kg8 28.Bc4+ Be6 29.Be2 Nxf3+
30.Bxf3 Rg6+ (175.528.170) 504

27/44 6:43 +0.28++ 21...Ndf3+ 22.gxf3 Qd7 23.Bb5 Qh3
24.Be2 Rf6 25.Bxe5 dxe5 26.Qd8+ Rf8
27.Qxg5 h6 28.Qg3 Be6 29.Qxh3 (201.022.994) 498

27/44 6:53 +0.46++ 21...Ndf3+ 22.gxf3 Qd7 23.Bb5 Qh3
24.Be2 Rf6 25.Bxe5 dxe5 26.Qd8+ Rf8
27.Qxg5 Bf6 28.Qg3 Rg8 29.a3 Rxg3+
30.fxg3 Qxg3+ 31.Kh1 Qh3+ 32.Kg1 Be6
33.f4 exf4 34.Rxf4 Bxc3 (206.155.006) 498

27/48 8:10 +0.73++ 21...Ndf3+ 22.gxf3 Qd7 23.Ne1 Rf6
24.Qa4 Qf7 25.Qa5 Be6 26.f4 Nh3+
27.Kh1 Nxf4 28.Bxf4 exf4 29.Nf3 Rh6+
30.Nh2 Rh5 31.Qa3 f3 32.Rg1 Be5
33.Nb1 (242.645.562) 495

27/48 8:59 +1.14++ 21...Ndf3+ 22.gxf3 Qd7 23.Ne1 Rf6
24.b3 Qh3 25.Bc4 Rh6 26.Qxd6 Rxd6
27.Bxe5 (266.574.906) 494

27/49 10:05 +1.75++ 21...Ndf3+ 22.gxf3 Qd7 23.Ne1 Rf6
24.b3 Qh3 25.Bc4 Rh6 26.Qxd6 Rxd6 (298.884.105) 493

27/59 14:13 +1.65 21...Ndf3+ 22.gxf3 Qd7 23.Be2 Rf6
24.Nd5 Rh6 25.f4 Nh3+ 26.Kg2 Nxf4+
27.Kf3 Rh3 28.Nxf4 exf4 29.Kxf4 h5
30.Bxh5 Qe6 31.Ke3 Qh6+ 32.Kd3 Rxh5
33.Rh1 Bh3 34.Ne3 Qh7 (425.247.480) 498

best move: Nd4-f3 time: 14:30.359 min n/s: 498.002 nodes: 425.247.480
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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Martin Thoresen
Posts: 1833
Joined: Thu Jun 22, 2006 12:07 am

Re: Test position: Fridman-Naidistch (2013) - Very hard

Post by Martin Thoresen »

After about 10 minutes the normal Houdini 3 doesn't seem to find Ndf3+.
This from the new TCEC computer.

Code: Select all

FEN: r1bq1r1k/pp4bp/3p4/4p1n1/3nP3/2NB2B1/PPN2PP1/R2Q1RK1 b - - 0 21 

Houdini_3_Pro_x64:
  4/17	00:00	       3 115	3 115 000	-0,65	21. ... Qb6 22.Nxd4 Qxd4 23.Nb5 Qxb2 24.Nxd6 Bd7 25.Rc1 Qxa2 26.Nxb7
  5/17	00:00	       4 068	2 034 000	-0,65	21. ... Qb6 22.Nxd4 Qxd4 23.Nb5 Qxb2 24.Nxd6 Bd7 25.Rc1 Qxa2 26.Nxb7
  6/17	00:00	       6 970	2 323 000	-0,93	21. ... Qb6 22.Nxd4 Qxd4 23.Nb5 Qxb2 24.Nxd6 Be6 25.Nf5
  6/18	00:00	      10 046	2 511 000	-0,75	21. ... Nge6 22.Nd5 Bd7 23.Nxd4 Nxd4 24.Rc1 Qg5
  7/19	00:00	      11 932	2 386 000	-0,78	21. ... Nge6 22.Nd5 Bd7 23.Nxd4 Nxd4 24.Rc1 Rc8 25.Qh5
  8/19	00:00	      16 242	2 707 000	-0,81	21. ... Nge6 22.Nd5 Bd7 23.Nxd4 Nxd4 24.Rc1 Rc8 25.Qh5 Qa5
  8/19+	00:00	      21 704	2 713 000	-0,67	21. ... Qb6
  8/20	00:00	      29 156	2 650 000	-0,81	21. ... Nge6 22.Nd5 Bd7 23.Nxd4 Nxd4 24.Rc1 Rc8 25.Qh5 Qa5
  8/20+	00:00	      33 298	2 774 000	-0,51	21. ... Ngf3+
  8/20+	00:00	      36 245	2 788 000	-0,14	21. ... Ngf3+
  8/21	00:00	      42 574	2 838 000	-0,81	21. ... Nge6 22.Nd5 Bd7 23.Nxd4 Nxd4 24.Rc1 Rc8 25.Qh5 Qa5
  9/21	00:00	      56 470	1 882 000	-0,71	21. ... Nge6 22.Nxd4 Nxd4 23.Nd5 Bd7 24.Rc1 Rc8 25.Qh5 Qa5 26.Ne7
 10/21+	00:00	     101 846	2 078 000	-0,62	21. ... Nge6
 10/21	00:00	     135 405	2 554 000	-0,62	21. ... Nge6 22.Nxd4 Nxd4 23.Qd2 Qa5 24.Rac1 Be6 25.Bh4 Rf7 26.f3 Rc8
 10/26+	00:00	     158 698	2 235 000	-0,46	21. ... Ngf3+
 10/29-	00:00	     190 926	2 512 000	-0,82	21. ... Ngf3+ 22.gxf3
 10/29	00:00	     190 927	2 512 000	-0,62	21. ... Nge6 22.Nxd4 Nxd4 23.Qd2 Qa5 24.Rac1 Be6 25.Bh4 Rf7 26.f3 Rc8
 11/29-	00:00	     232 396	2 611 000	-0,71	21. ... Nge6 22.Nxd4
 11/29	00:00	     597 112	4 118 000	-0,68	21. ... Nge6 22.Nxd4 Nxd4 23.Nd5 Bh6 24.Qe1 Bd7 25.Qb4 Bc6 26.f4 a5 27.Qc3 Rg8
 12/29	00:00	     645 933	4 277 000	-0,68	21. ... Nge6 22.Nxd4 Nxd4 23.Nd5 Bh6 24.Qe1 Bd7 25.Qb4 Bc6 26.f4 a5 27.Qc3 Rg8
 13/37+	00:00	   1 030 614	5 481 000	-0,59	21. ... Nge6
 13/37	00:00	   1 234 153	5 962 000	-0,57	21. ... Nge6 22.Nxd4 Nxd4 23.Nd5 Bh6 24.Qe1 Rg8 25.f4 Bxf4 26.Nxf4 exf4 27.Qc3 Rxg3 28.Qxd4+ Rg7 29.Rxf4 Be6 30.Raf1 Qg5 31.Rf8+ Rxf8 32.Rxf8+ Bg8
 14/37	00:00	   2 476 591	7 573 000	-0,54	21. ... Nge6 22.Nxd4 Nxd4 23.Nd5 Bh6 24.f4 Rg8 25.Qe1 Bxf4 26.Bxf4 exf4 27.Nxf4 Qb6 28.Qc3 Rg7 29.Kh1 Be6 30.Nd5 Bxd5 31.exd5
 15/40	00:00	   6 433 820	11 826 000	-0,52	21. ... Nge6 22.Nd5 Bh6 23.Nce3 Bd7 24.Rc1 Bxe3 25.Nxe3 Qf6 26.Qd2 Bc6 27.f3 Rac8 28.Ng4 Qg7 29.Bc4 Bxe4 30.Bxe6 Nxe6 31.Qxd6
 16/40-	00:01	   7 723 256	12 029 000	-0,60	21. ... Nge6 22.Nd5
 16/40	00:01	  11 651 361	13 563 000	-0,52	21. ... Nge6 22.Nd5 Bh6 23.Nce3 Bd7 24.Rc1 Bxe3 25.Nxe3 Qf6 26.Qd2 Bc6 27.Nd5 Bxd5 28.exd5 Nc5 29.Bb1 Rac8 30.b4 Nd7 31.Rxc8 Rxc8 32.Qd3
 17/43+	00:01	  25 583 908	18 565 000	-0,44	21. ... Nge6
 17/49	00:02	  50 581 750	21 906 000	-0,53	21. ... Nge6 22.Nxd4 Nxd4 23.Qh5 Be6 24.Nd5 Rc8 25.Bh4 Qd7 26.Be7 Rf7 27.Bg5 Bg4 28.Qh4 Be2 29.Bxe2 Nxe2+ 30.Kh1 Rc2 31.Nf6 Bxf6 32.Bxf6+ Kg8 33.Rad1 Qe6 34.Qg5+ Kf8
 18/49	00:02	  55 226 766	21 854 000	-0,53	21. ... Nge6 22.Nxd4 Nxd4 23.Qh5 Be6 24.Nd5 Rc8 25.Bh4 Qd7 26.Be7 Rf7 27.Bg5 Bg4 28.Qh4 Be2 29.Bxe2 Nxe2+ 30.Kh1 Rc2 31.Nf6 Bxf6 32.Bxf6+ Kg8 33.Rad1 Qe6 34.Qg5+ Kf8
 19/49+	00:03	  67 169 960	22 059 000	-0,45	21. ... Nge6
 19/49	00:04	  86 492 219	22 791 000	-0,36	21. ... Nge6 22.Nxd4 Nxd4 23.Qh5 Be6 24.Nd5 Bf7 25.Qh2 Qg5 26.f4 Qg4 27.fxe5 Bxd5 28.exd5 Ne2+ 29.Bxe2 Qxe2 30.Rfc1 dxe5 31.Re1 Qxb2 32.Bxe5 Qf2+ 33.Kh1 Bxe5 34.Qxe5+ Rf6 35.Re2 Qf4 36.Qxf4 Rxf4 37.Re7 Rd8
 20/52-	00:04	 105 195 617	23 175 000	-0,45	21. ... Nge6 22.Nxd4
 20/52	00:06	 144 834 577	24 011 000	-0,40	21. ... Nge6 22.Nxd4 Nxd4 23.Qh5 Be6 24.Nd5 Bf7 25.Qh2 Qg5 26.f4 Qg4 27.fxe5 Bxd5 28.exd5 Ne2+ 29.Bxe2 Qxe2 30.Rfe1 Qxb2 31.Rab1 Qd4+ 32.Kh1 dxe5 33.Bxe5 Bxe5 34.Qxe5+ Qxe5 35.Rxe5 Rf7 36.d6 Kg7 37.Kh2 Rd8 38.Re7 Rxd6 39.Rxf7+ Kxf7 40.Rxb7+ Kf6 41.Rxa7
 21/52-	00:06	 147 221 812	23 841 000	-0,48	21. ... Nge6 22.Nxd4
 21/53	00:09	 223 822 572	25 033 000	-0,45	21. ... Nge6 22.Nxd4 Nxd4 23.Qh5 Be6 24.Nd5 Bf7 25.Qh2 Qg5 26.Rac1 Rae8 27.Ne3 Rc8 28.b3 Rg8 29.Rfe1 Qg6 30.Rxc8 Rxc8 31.Qh3 Rc3 32.Rd1 d5 33.Nf5 Nxf5 34.exf5
 22/53	00:10	 251 504 584	25 484 000	-0,45	21. ... Nge6 22.Nxd4 Nxd4 23.Qh5 Be6 24.Nd5 Bf7 25.Qh2 Qg5 26.Rac1 Rae8 27.Ne3 Rc8 28.b3 Rg8 29.Rfe1 Qg6 30.Rxc8 Rxc8 31.Qh3 Rc3 32.Rd1 d5 33.Nf5 Nxf5 34.exf5
 23/57+	00:17	 469 958 349	27 460 000	-0,37	21. ... Nge6
 23/57	00:22	 615 472 434	28 151 000	-0,37	21. ... Nge6 22.Nxd4 Nxd4 23.Nb5 Nxb5 24.Bxb5 Be6 25.Rc1 Bh6 26.Rc3 Bf4 27.a4 Bxg3 28.Rxg3 Rc8 29.Qd2 a6 30.Bd3 Rg8 31.Rxg8+ Kxg8 32.Be2 Rc6 33.a5 Bf7 34.Rd1 Bb3 35.Rc1 Rxc1+ 36.Qxc1 Kg7 37.Qe3
 23/61+	00:24	 668 867 037	28 205 000	-0,21	21. ... Ngf3+
other best move - reduce depth to 20
 20/70	00:26	 728 275 457	28 202 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kh1 Qd7 25.Ne1 Qh3+ 26.Kg1 Bd7 27.Bb5 Rxf2 28.Rxf2 Qxg3+ 29.Ng2 Rf8 30.Qd2 Rxf2 31.Qxf2 Nf3+ 32.Kf1 Nh2+ 33.Ke2 Bg4+ 34.Ke1 Nf3+ 35.Ke2 Nd2+ 36.Ke1 Nf3+ 37.Ke2
 21/70	00:26	 739 084 375	28 127 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kh1 Qd7 25.Ne1 Qh3+ 26.Kg1 Bd7 27.Bb5 Rxf2 28.Rxf2 Qxg3+ 29.Ng2 Rf8 30.Qd2 Rxf2 31.Qxf2 Nf3+ 32.Kf1 Nh2+ 33.Ke2 Bg4+ 34.Ke1 Nf3+ 35.Ke2 Nd2+ 36.Ke1 Nf3+ 37.Ke2
 22/70	00:27	 754 914 444	28 040 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kh1 Qd7 25.Ne1 Qh3+ 26.Kg1 Bd7 27.Bb5 Rxf2 28.Rxf2 Qxg3+ 29.Ng2 Rf8 30.Qd2 Rxf2 31.Qxf2 Nf3+ 32.Kf1 Nh2+ 33.Ke2 Bg4+ 34.Ke1 Nf3+ 35.Ke2 Nd2+ 36.Ke1 Nf3+ 37.Ke2
 23/70	00:28	 786 286 366	27 969 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kh1 Qd7 25.Ne1 Qh3+ 26.Kg1 Bd7 27.Bb5 Rxf2 28.Rxf2 Qxg3+ 29.Ng2 Rf8 30.Qd2 Rxf2 31.Qxf2 Nf3+ 32.Kf1 Nh2+ 33.Ke2 Bg4+ 34.Ke1 Nf3+ 35.Ke2 Nd2+ 36.Ke1 Nf3+ 37.Ke2
 24/70	00:31	 884 064 947	27 977 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kh1 Qd7 25.Ne1 Qh3+ 26.Kg1 Bd7 27.Bb5 Rxf2 28.Rxf2 Qxg3+ 29.Ng2 Rf8 30.Qd2 Rxf2 31.Qxf2 Nf3+ 32.Kf1 Nh2+ 33.Ke2 Bg4+ 34.Ke1 Nf3+ 35.Ke2 Nd2+ 36.Ke1 Nf3+ 37.Ke2
 25/70	00:38	1 064 479 139	28 279 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kh1 Qd7 25.Ne1 Qh3+ 26.Kg1 Bd7 27.Bb5 Rxf2 28.Rxf2 Qxg3+ 29.Ng2 Rf8 30.Qd2 Rxf2 31.Qxf2 Nf3+ 32.Kf1 Nh2+ 33.Ke2 Bg4+ 34.Ke1 Nf3+ 35.Ke2 Nd2+ 36.Ke1 Nf3+ 37.Ke2
 26/70	00:49	1 415 465 436	28 953 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kh1 Qd7 25.Ne1 Qh3+ 26.Kg1 Bd7 27.Bb5 Rxf2 28.Rxf2 Qxg3+ 29.Ng2 Rf8 30.Qd2 Rxf2 31.Qxf2 Nf3+ 32.Kf1 Nh2+ 33.Ke2 Bg4+ 34.Ke1 Nf3+ 35.Ke2 Nd2+ 36.Ke1 Nf3+ 37.Ke2
 27/70	01:08	2 034 676 931	29 813 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+ 25.Kg2
 28/70	01:42	3 138 656 497	30 869 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+ 25.Kg2
 29/71	02:36	4 968 402 725	31 873 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+ 25.Kg2
 30/71	03:56	7 729 178 300	32 694 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+ 25.Kg2
 31/82	10:41	23 737 015 583	37 044 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+ 25.Kg2
 31/82	10:48	24 013 401 395	37 039 000	 0,00	21. ... Ngf3+ 22.gxf3 Nxf3+ 23.Kg2 Nh4+ 24.Kg1 Nf3+ 25.Kg2
Best move: Ngf3, Value: 0,00, Depth: 31/82, Time: 10:48,705, 24 013 401 395 Nodes, 37 039 kN/sec.
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Test position: Fridman-Naidistch (2013) - Very hard

Post by kgburcham »

[d] r1bq1r1k/pp4bp/3p4/4p1n1/3nP3/2NB2B1/PPN2PP1/R2Q1RK1 b - -

Default settings
Engine: Houdini 3 Pro x64 (4096 MB)
by Robert Houdart
17/40 0:00 +0.53++ 1...Nge6 (14.751.801) 19333
17/42 0:01 +0.60 1...Nge6 2.Nxd4 Nxd4 3.Qh5 Be6 4.Nd5 Rc8 5.Bh4 Qe8 6.Qxe8 Rfxe8 7.Rac1 Bxd5 (34.404.215) 23404
18/46 0:01 +0.52++ 1...Nge6 (43.169.717) 23297
18/46 0:01 +0.53 1...Nge6 2.Nxd4 Nxd4 3.Qh5 Be6 4.Nd5 Qd7 5.Rac1 Rac8 6.Qh4 Rxc1 7.Rxc1 Nf5 (44.374.332) 23354
19/46 0:02 +0.45++ 1...Nge6 (55.741.617) 23519
19/46 0:02 +0.52 1...Nge6 2.Nxd4 Nxd4 3.Qh5 Be6 4.Nd5 Bf7 5.Qh3 Be6 6.Qh2 Qg5 7.f4 Qg4 (60.661.781) 23530
20/50 0:03 +0.44++ 1...Nge6 (86.225.857) 24461
20/50 0:03 +0.46 1...Nge6 2.Nxd4 Nxd4 3.Qh5 Be6 4.Nd5 Bf7 5.Qh3 Be6 6.Qh2 Rc8 7.Rae1 Qd7 (89.884.824) 24478
21/56 0:05 +0.44 1...Nge6 2.Nxd4 Nxd4 3.Qh5 Be6 4.Nd5 Bf7 5.Qh3 Be6 6.Qh2 Rc8 7.Rae1 Qd7 (126.677.498) 25174
22/56 0:13 +0.35++ 1...Nge6 (359.190.607) 27269
22/56 0:14 +0.52-- 1...Nge6 2.Nxd4 (400.890.540) 27191
22/62 0:19 +0.19++ 1...Ndf3+ (538.958.495) 27889
22/73 0:28 0.00 1...Ndf3+ 2.gxf3 Qd7 3.Ne1 Rf6 4.Qa4 Qh3 5.Qe8+ Bf8 6.Qd8 Qh6 7.Rd1 Nh3+ 8.Kg2 Nf4+ 9.Kg1 Nh3+ 10.Kg2 (799.673.522) 27654
23/73 0:32 -0.08++ 1...Ndf3+ (906.236.493) 27678
23/73 0:35 -0.24++ 1...Ndf3+ (977.180.243) 27688
23/78 1:06 -0.18 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ (1.899.105.412) 28767
24/78 1:53 -0.26++ 1...Ndf3+ (3.471.628.030) 30580
24/78 2:08 -0.27 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Rh2 8.Rg1 Qh3 (3.898.135.949) 30395
25/78 2:38 -0.19-- 1...Ndf3+ 2.gxf3 (4.904.844.559) 30850
25/78 3:06 -0.13 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Rh3+ 11.f3 Be6 12.Rg1 Qe5 13.Rxg7 Bxd5 14.exd5 Kxg7 (5.751.707.900) 30879
26/78 3:56 -0.16 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Rh3+ 11.f3 Be6 12.Rg1 Qe5 13.Rxg7 Bxd5 14.exd5 Kxg7 (7.403.455.237) 31301
27/80 8:04 -0.16 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Rh3+ 11.f3 Be6 12.Rg1 Qe5 13.Rxg7 Bxd5 14.exd5 Kxg7 (16.107.838.532) 33250
28/80 8:50 -0.16 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Rh3+ 11.f3 Be6 12.Rg1 Qe5 13.Rxg7 Bxd5 14.exd5 Kxg7 (17.555.709.656) 33109
28/80 9:55 -0.16 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Rh3+ 11.f3 Be6 12.Rg1 Qe5 13.Rxg7 Bxd5 14.exd5 Kxg7 (18.083.066.554) 30376


not default settings
Engine: Houdini 3 Pro x64 (4096 MB)
by Robert Houdart
15/39 0:00 +0.48-- 1...Nge6 2.Nxd4 (11.149.244) 16690
15/55 0:01 +0.32++ 1...Ngf3+ (25.899.233) 20155
15/56 0:01 +0.16++ 1...Ngf3+ (27.697.941) 20366
other best move - reduce depth to 12
12/56 0:01 +0.33 1...Ngf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kh1 Qd7 5.Ne1 Qh3+ 6.Kg1 Be6 7.Bxh4 Qxh4 8.Ne2 Bg4 9.Ng2 Qh3 10.Ne1 Qh4 (27.819.587) 20350
13/56 0:01 +0.25++ 1...Ngf3+ (27.832.507) 20315
13/56 0:01 +0.33 1...Ngf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kh1 Qd7 5.Ne1 Qh3+ 6.Kg1 Be6 7.Bb5 Rxf2 8.Rxf2 Qxg3+ (28.295.627) 20254
14/56 0:01 +0.25++ 1...Ngf3+ (29.170.811) 20131
14/56 0:01 +0.33 1...Ngf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kh1 Qd7 5.Ne1 Qh3+ 6.Kg1 Be6 7.Bb5 Rxf2 8.Rxf2 Qxg3+ (29.202.323) 20084
15/56 0:01 +0.42-- 1...Ngf3+ 2.gxf3 (32.720.251) 20323
15/57 0:01 +0.25++ 1...Ndf3+ (36.465.809) 20349
15/57 0:01 +0.33 1...Ndf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kh1 Qd7 5.Ne1 Qh3+ 6.Kg1 Be6 7.Bb5 Rxf2 8.Rxf2 Qxg3+ 9.Ng2 Rf8 (36.587.608) 20292
16/57 0:02 +0.25++ 1...Ndf3+ (40.788.749) 20242
16/57 0:02 +0.33 1...Ndf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kh1 Qd7 5.Ne1 Qh3+ 6.Kg1 Be6 7.Bb5 Rxf2 8.Rxf2 Qxg3+ 9.Ng2 Rf8 (41.334.911) 20222
17/57 0:02 +0.25++ 1...Ndf3+ (48.600.846) 20515
17/57 0:02 +0.33 1...Ndf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kh1 Qd7 5.Ne1 Qh3+ 6.Kg1 Be6 7.Bb5 Rxf2 8.Rxf2 Qxg3+ 9.Ng2 Rf8 (51.396.725) 20741
18/57 0:03 +0.42-- 1...Ndf3+ 2.gxf3 (75.385.331) 22159
18/67 0:06 +0.25++ 1...Ngf3+ (160.207.801) 24708
18/67 0:06 +0.33 1...Ngf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kg1 Nf3+ 5.Kh1 Qd7 6.Bh2 Qh3 (168.342.357) 24763
19/67 0:09 +0.25++ 1...Ngf3+ (253.753.634) 25898
19/67 0:09 +0.33 1...Ngf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kg1 Nf3+ 5.Kg2 Qf6 6.Be2 Bg4 7.Ne3 (254.367.297) 25879
20/67 0:14 +0.25++ 1...Ngf3+ (395.287.625) 26685
20/67 0:14 +0.33 1...Ngf3+ 2.gxf3 Nxf3+ 3.Kg2 Nh4+ 4.Kg1 Nf3+ 5.Kg2 Qf6 6.Be2 Bg4 7.Ne3 (397.305.985) 26673
20/67 0:25 +0.09++ 1...Ndf3+ (727.270.162) 28162
other best move - reduce depth to 17
17/67 0:26 +0.08 1...Ndf3+ 2.gxf3 Qd7 3.Ne1 Rf6 4.Qd2 Nh3+ 5.Kh2 Rh6 6.Rh1 Nxf2+ 7.Qxh6 Bxh6 8.Bxf2 Qg7 9.Nd5 Qg6 10.Ng2 Be6 (735.175.427) 28096
18/67 0:26 +0.08 1...Ndf3+ 2.gxf3 Qd7 3.Ne1 Rf6 4.Qd2 Nh3+ 5.Kh2 Rh6 6.Rh1 Nxf2+ 7.Qxh6 Bxh6 8.Bxf2 Qg7 9.Nd5 Qg6 10.Ng2 Be6 (736.920.992) 28080
19/67 0:26 0.00++ 1...Ndf3+ (746.769.734) 28003
19/67 0:27 -0.15++ 1...Ndf3+ (761.464.422) 27914
19/67 0:28 -0.52++ 1...Ndf3+ (798.199.222) 27793
19/77 0:40 -0.40 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Be6 (1.122.036.010) 27860
20/77 0:52 -0.31-- 1...Ndf3+ 2.gxf3 (1.515.048.349) 28602
20/77 1:03 -0.15-- 1...Ndf3+ 2.gxf3 (1.825.669.323) 28864
20/77 1:06 -0.19 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Be6 11.Rg1 Qe5 12.Rxg7 Bxd5 13.exd5 Qxg7 14.Nd4 Rh2 (1.922.003.361) 28729
21/77 1:08 -0.19 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Be6 11.Rg1 Qe5 12.Rxg7 Bxd5 13.exd5 Qxg7 14.Nd4 Rh2 (1.965.206.689) 28670
22/77 1:20 -0.19 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Qg4+ 8.Ke3 Qg5 9.Bxf4 exf4+ 10.Kd3 Be6 11.Rg1 Qe5 12.Rxg7 Bxd5 13.exd5 Qxg7 14.Nd4 Rh2 (2.305.201.719) 28760
23/77 1:59 -0.27++ 1...Ndf3+ (3.487.223.997) 29199
23/85 2:08 -0.20 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Rh2 8.Rg1 Qh3 9.Ke3 Bh6 10.Bf3 Nxd5+ 11.Ke2 Bg4 12.Qxd5 Bxf3+ 13.Kd3 Bg4 14.Ne3 Bxe3 (3.770.495.054) 29312
24/85 2:57 -0.20 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Rh2 8.Rg1 Qh3 9.Ke3 Bh6 10.Bf3 Nxd5+ 11.Ke2 Bg4 12.Qxd5 Bxf3+ 13.Kd3 Bg4 14.Ne3 Bxe3 (5.304.573.747) 29909
25/85 6:39 -0.28++ 1...Ndf3+ (12.559.692.268) 31415
25/85 7:08 -0.28 1...Ndf3+ 2.gxf3 Qd7 3.Be2 Rf6 4.Nd5 Rh6 5.f4 Nh3+ 6.Kg2 Nxf4+ 7.Kf3 Rh2 8.Rg1 Qh3 9.Ke3 Bh6 10.Bf3 Nxd5+ 11.Ke2 Bg4 12.Qxd5 Bxf3+ 13.Kd3 Bg4 14.Ne3 Bxe3 (13.401.718.103) 31285
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test position: Fridman-Naidistch (2013) - Very hard

Post by zullil »

Code: Select all

30/78  201:43  136978M  11317K  +0.18 Qd7 Be2 Nh3+ Kh1 Rf6 Bb5 Qe6 Qd5 Qe7 Kg2 Rg6 Qd2 Nf4+ Kg1 Qh4 Ne3 Qh3 Ncd5 Rh6
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