another hard position (mate in 18) from 1998, by Ed Shröder

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JuLieN
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another hard position (mate in 18) from 1998, by Ed Shröder

Post by JuLieN » Sun Jul 17, 2011 2:31 pm

I'm exhuming another difficult position from CCC's archive. Here's the original message by Ed Shröder:
Ed Shröder wrote: Subject: Mate in 18 moves?

Author: Ed Schröder

Date: 08:11:14 01/09/98

Mate in 18 moves?

I am busy to release some new EPD test sets in the Rebel9 subscription
area. One the EPD sets is a 200 positions selection from the Austrian
Modul magazine with lots of funny old stuff.

I then came across the following cool "mate in 18(?)" position:

[Event "?"]
[Site "3/93-51 Matt in wieviel?"]
[Date "1992.01.01"]
[Round "?"]
[White "Kristian Skoeld: Sc"]
[Black ""]
[Result "1-0"]
[WhiteElo "?"]
[BlackElo "?"]
[FEN "1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1"]

1. Qxg6+ Kxg6 2. Bd3+ Kh5 3. g4+ Kxg4 4. Rg1+ Kf4 5. Bg3+ Kg4 6. Be1+ Kh3
7. Bf1+ Kh2 8. Bg3+ Kxg1 9. Ra1 Ra8 10. Rc1 Ra1 11. Kxa1 Qa7+ 12. Kb2 Qa1+
13. Kxa1 Ra8+ 14. Na2 Rxa2+ 15. Kxa2 Bg5 16. hxg5 f2 17. Bh3+ f1=Q 18. Rxf1# 1-0

I have tried Rebel9 for a few minutes but it didn't find the mate.

The usual killers (quiet moves) here are:
9.Ra1
10.Rc1
and especially 16.hxg5 f2

Any program?

- Ed -
Here's the diagram:

[d]1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1

And some answers back from the days, showing that no engine could find it 13 years ago, except Gromit, although it didn't see it as a mate :
Covax wrote:Hi,
I test Fritz 5.01, Hiarcs 6.0, Mate 1.0 (mate search engine)
I think, that this test is very hard to today chess programms.
Fritz 5.01 find, if computer x100 faster than Pentium 200 MMX.

Pentium 200 MMX
Fritz 5.01
1.h5 -1.41
(00:06:32)

Hiarcs 6.0
1.h5 -2.14
(00:04:17)

Mate 1.0
Not find in 10 minutes
With best regards, Covax.
Frank Schneider wrote:I tried Gromit and it plays Qxg6 with a score of 0. Of course it can't
see
the mate. The reason for the 0 score is a heuristic that is like 'if
black
has so much more material it should find a variation where the king
isn't
forced to move so often' (anyone else doing things like this? Any
program
playing Qxg6?).
However, if the above position is OK 4. ... Kf4 will be refuted by Bg6
with
mate in 3.

Therefore
4. ... Kh3
5. Bf1+ Kh2
6. Rg4! e5 (or Ra8 7.Nd3 or Qc7 7.Nd3)
7. Bg3+ Kh1/g1
8. Ra1 Ra8
9. Rd1 Ra1
10.Rxa1 Ra8 (or Qa7, Rb1...)
11.Rd1 Ra1
12.Rxa1 Qa7
13.Rb1 Qa1+
14.Kxa1 Bg5
15.Bh3+ Bc1
16.Rxc1#
I didn't analyze deeply, but it still seems to be a mate in 16 that is
easier for humans than for computers.

Frank
I let Prédateur pounder this for a pair of minutes and it sticks to h5. Just like Komodo, Fruit and Stockfish (didn't try other engines on my Mac).

What would your engine play?
"The only good bug is a dead bug." (Don Dailey)
Image [Blog: http://tinyurl.com/predateur ] [Facebook: http://tinyurl.com/fbpredateur ] [MacEngines: http://tinyurl.com/macengines ]

Ignacio
Posts: 148
Joined: Wed Mar 08, 2006 7:15 pm

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by Ignacio » Sun Jul 17, 2011 2:54 pm

The position is mate in 15 (see ChestUCI.epd).

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David Dahlem
Posts: 900
Joined: Wed Mar 08, 2006 8:06 pm

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by David Dahlem » Sun Jul 17, 2011 3:14 pm

Fire 2.2 xTreme (with custom settings) says mate in 15:

18 00:30 101.987.930 3.368.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a2+ Nb4xa2 f3f2 Bf1h3+ f2f1Q Rb1xf1+
18 00:30 101.999.763 3.368.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a2+ Nb4xa2 f3f2 Bf1h3+ f2f1Q Rb1xf1+
19 00:30 102.350.362 3.371.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a2+ Nb4xa2 f3f2 Bf1h3+ f2f1Q Rb1xf1+
19 00:30 102.369.666 3.370.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a2+ Nb4xa2 f3f2 Bf1h3+ f2f1Q Rb1xf1+
20 00:30 102.801.631 3.375.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
20 00:30 102.840.839 3.375.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
21 00:30 103.889.276 3.385.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
21 00:30 103.972.709 3.386.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
22 00:31 105.974.680 3.408.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
22 00:31 106.251.300 3.410.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
23 00:31 109.722.032 3.451.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
23 00:31 110.110.160 3.454.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
24 00:33 116.734.132 3.529.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
24 00:33 117.428.681 3.535.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
25 00:35 128.489.766 3.649.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
25 00:35 130.793.262 3.669.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
26 00:39 152.931.348 3.854.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
26 00:40 158.915.650 3.898.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
27 00:49 207.749.384 4.197.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+
27 00:53 228.637.639 4.280.000 +M15 Qd3xg6+ Kh7xg6 Bf1d3+ Kg6h5 g3g4+ Kh5xg4 Rh1g1+ Kg4h3 Bd3f1+ Kh3h2 Bf2g3+ Kh2xg1 Ra5a1 Rb8a8 Ra1d1 Ra8a1 Rd1xa1 Rg8a8 Ra1d1 Ra8a1 Rd1xa1 Qd7a7 Ra1b1 Qa7a1+ Rb1xa1 f3f2 Bf1h3+ f2f1Q Ra1xf1+

chess247

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by chess247 » Sun Jul 17, 2011 3:43 pm

Critter finds a mate in 13 seconds:
23 +99.71 46.7M 0:13.26 Qxg6+ Kxg6 Bd3+ Kh5 g4+ Kxg4 Rg1+ Kh3 Bf1+ Kh2 Bg3+ Kxg1 Ra1 Ra8 Rb1 Ra1 Kxa1 Qa7+ Kb2 Qa3+ Kxa3 Ra8+ Kb2 Ra1 Rxa1 f2 Bh3+ f1=Q Rxf1#

zullil
Posts: 6393
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by zullil » Sun Jul 17, 2011 5:14 pm

chess247 wrote:Critter finds a mate in 13 seconds:
23 +99.71 46.7M 0:13.26 Qxg6+ Kxg6 Bd3+ Kh5 g4+ Kxg4 Rg1+ Kh3 Bf1+ Kh2 Bg3+ Kxg1 Ra1 Ra8 Rb1 Ra1 Kxa1 Qa7+ Kb2 Qa3+ Kxa3 Ra8+ Kb2 Ra1 Rxa1 f2 Bh3+ f1=Q Rxf1#
Critter-1.2.1 (8 threads) on my Mac Pro finds mate-in-16 in 4 seconds and mate-in-15 in less than 6:

Code: Select all

info multipv 1 depth 16 seldepth 58 nodes 26526086 time 4229 nps 6272425 hashfull 0 tbhits 0 score mate 16 pv d3g6 h7g6 f1d3 g6h5 g3g4 h5g4 h1g1 g4h3 d3f1 h3h2 f2g3 h2g1 a5a1 b8a8 a1d1 a8a1 d1a1 d7a7 a1c1 f6g5 h4g5 a7a3 b2a3 g8a8 a3b2 a8a1 c1a1 f3f2 f1h3 f2f1q a1f1 

info multipv 1 depth 23 seldepth 58 nodes 41285546 time 5980 nps 6903937 hashfull 0 tbhits 0 score mate 15 pv d3g6 h7g6 f1d3 g6h5 g3g4 h5g4 h1g1 g4h3 d3f1 h3h2 f2g3 h2g1 a5a1 b8a8 a1b1 a8a1 b2a1 d7a7 a1b2 a7a3 b2a3 g8a8 a3b2 a8a1 b1a1 f3f2 f1h3 f2f1q a1f1 

User avatar
Michael Diosi
Posts: 672
Joined: Mon Jun 22, 2009 11:37 am

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by Michael Diosi » Sun Jul 17, 2011 5:28 pm

Hi,

1.Dd3-g6 Kh7-g6 2.Lf1-d3 Kg6-h5 3.Bg3-g4 Kh5-g4 4.Th1-g1 Kg4-h3 5.Ld3-f1 Kh3-h2 6.Lf2-g3 Kh2-g1 7.Ta5-a1 Dd7-a7 8.Ta1-b1 Da7-a1 9.Tb1-a1 Tb8-a8 10.Ta1-b1 Ta8-a1 11.Tb1-a1 Tg8-a8 12.Ta1-b1 Ta8-a1 13.Tb1-a1 Bf3-f2 14.Lf1-h3 f2-f1D 15.Ta1-f1#

Gustav 3.2d in automatic mode takes 4.93 sec on my AMD 3000+


Michael

kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 3:19 pm

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by kgburcham » Sun Jul 17, 2011 6:35 pm

[D] 1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1

Deep Rybka 4 SSE42 x64:

1.Qxg6+ Kxg6 2.Bd3+[] Kh5[] 3.g4+ Kxg4[] 4.Rg1+[] Kh3[] 5.Bf1+[] Kh2[]
-/+ (-1.00 ++) Depth: 12 00:00:00 394kN
1.Qxg6+ Kxg6 2.Bd3+[] Kh5[] 3.g4+ Kxg4[] 4.Rg1+[] Kh3[] 5.Bf1+[] Kh2[]
= (-0.20 ++) Depth: 12 00:00:01 437kN
1.Qxg6+ Kxg6 2.Bd3+[] Kh5 3.g4+[] Kxg4 4.Rg1+[] Kh3 5.Bf1+[] Kh2
+- (#15) Depth: 12 00:00:02 1343kN
1.Qxg6+ Kxg6 2.Bd3+[] Kh5 3.g4+[] Kxg4 4.Rg1+[] Kh3 5.Bf1+[] Kh2
+- (#15) Depth: 15 00:00:03 2190kN
1.Qxg6+ Kxg6 2.Bd3+[] Kh5 3.g4+[] Kxg4 4.Rg1+[] Kh3 5.Bf1+[] Kh2
+- (#15) Depth: 16 00:00:06 3920kN

zullil
Posts: 6393
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by zullil » Sun Jul 17, 2011 7:33 pm

kgburcham wrote:[D] 1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1

Deep Rybka 4 SSE42 x64:

1.Qxg6+ Kxg6 2.Bd3+[] Kh5[] 3.g4+ Kxg4[] 4.Rg1+[] Kh3[] 5.Bf1+[] Kh2[]
-/+ (-1.00 ++) Depth: 12 00:00:00 394kN
1.Qxg6+ Kxg6 2.Bd3+[] Kh5[] 3.g4+ Kxg4[] 4.Rg1+[] Kh3[] 5.Bf1+[] Kh2[]
= (-0.20 ++) Depth: 12 00:00:01 437kN
1.Qxg6+ Kxg6 2.Bd3+[] Kh5 3.g4+[] Kxg4 4.Rg1+[] Kh3 5.Bf1+[] Kh2
+- (#15) Depth: 12 00:00:02 1343kN
1.Qxg6+ Kxg6 2.Bd3+[] Kh5 3.g4+[] Kxg4 4.Rg1+[] Kh3 5.Bf1+[] Kh2
+- (#15) Depth: 15 00:00:03 2190kN
1.Qxg6+ Kxg6 2.Bd3+[] Kh5 3.g4+[] Kxg4 4.Rg1+[] Kh3 5.Bf1+[] Kh2
+- (#15) Depth: 16 00:00:06 3920kN
12 threads?

kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 3:19 pm

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by kgburcham » Sun Jul 17, 2011 8:30 pm

zullil wrote:
kgburcham wrote:
12 threads?
sorry Louis, 4 threads

CPU0: GenuineIntel Intel64 Family 6 Model 26 Stepping 5 2860 MHz
CPU1: GenuineIntel Intel64 Family 6 Model 26 Stepping 5 2860 MHz
CPU2: GenuineIntel Intel64 Family 6 Model 26 Stepping 5 2860 MHz
CPU3: GenuineIntel Intel64 Family 6 Model 26 Stepping 5 2860 MHz

Deep Rybka 4.1 SSE42 x64 (2048 MB)

12.00 0:00 -1.39++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rc1 Bg5 9.hxg5 Qa3+ 10.Kxa3 Ra8+ 11.Kb3 Ra1 12.Rxa1 Ra8 13.Rc1 Ra3+ 14.Kxa3 (410.742) 486
12.00 0:00 -1.24++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rc1 Bg5 9.hxg5 Qa3+ 10.Kxa3 Ra8+ 11.Kb3 Ra1 12.Rxa1 Ra8 13.Rc1 Ra3+ 14.Kxa3 (415.101) 483
12.00 0:00 -0.84++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rc1 Bg5 9.hxg5 Qa3+ 10.Kxa3 Ra8+ 11.Kb3 Ra1 12.Rxa1 Ra8 13.Rc1 Ra3+ 14.Kxa3 (422.750) 475
12.00 0:00 -0.04++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rc1 Bg5 9.hxg5 Qa3+ 10.Kxa3 Ra8+ 11.Kb3 Ra1 12.Rxa1 Ra8 13.Rc1 Ra3+ 14.Kxa3 (433.757) 470
12.00 0:01 +1.56++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ (457.079) 457
12.00 0:01 +4.76++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rc1 Bg5 9.hxg5 Qa3+ 10.Kxa3 Ra8+ 11.Kb3 Ra1 12.Rxa1 Ra8 13.Rc1 Ra3+ 14.Kxa3 (474.985) 447
12.01 0:01 +11.16++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rc1 Bg5 9.hxg5 Qa3+ 10.Kxa3 Ra8+ 11.Kb3 Ra1 12.Rxa1 Ra8 13.Rc1 Ra3+ 14.Kxa3 (479.288) 444
12.01 0:01 +23.96++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rc1 Bg5 9.hxg5 Qa3+ 10.Kxa3 Ra8+ 11.Kb3 Ra1 12.Rxa1 Ra8 13.Rc1 Ra3+ 14.Kxa3 (486.374) 451
12.01 0:01 +49.56++ 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rc1 Bg5 9.hxg5 Qa3+ 10.Kxa3 Ra8+ 11.Kb3 Ra1 12.Rxa1 Ra8 13.Rc1 Ra3+ 14.Kxa3 (489.901) 448
12.01 0:01 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rd1 Ra1 9.Rxa1 Ra8 10.Rb1 Ra1 11.Kxa1 Qa7+ 12.Kb2 Qa3+ 13.Kxa3 f2 14.Bh3+ (578.594) 475
13.01 0:01 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa3+ 9.Kxa3 Ra8+ 10.Kb2 Ra1 11.Kxa1 Ra8+ 12.Na2 Rxa2+ 13.Kxa2 f2 14.Bh3+ (679.443) 500
14.01 0:01 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa3+ 9.Kxa3 Ra8+ 10.Kb2 Ra1 11.Kxa1 Ra8+ 12.Na2 Rxa2+ 13.Kxa2 f2 14.Bh3+ (873.214) 537
15.01 0:02 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa3+ 9.Kxa3 Ra8+ 10.Kb2 Ra1 11.Kxa1 Ra8+ 12.Na2 Rxa2+ 13.Kxa2 f2 14.Bh3+ (1.252.258) 585
16.01 0:02 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa3+ 9.Kxa3 Ra8+ 10.Kb3 Ra1 11.Rxa1 Ra8 12.Rc1 Ra3+ 13.Kxa3 f2 14.Bh3+ (1.866.884) 636
17.01 0:04 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa3+ 9.Kxa3 Ra8+ 10.Kb2 Ra1 11.Kxa1 Ra8+ 12.Na2 Rxa2+ 13.Kxa2 f2 14.Bh3+ (2.814.829) 683

compare 12 thread kns to 4

CPU0: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU1: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU2: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU3: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU4: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU5: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU6: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU7: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU8: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU9: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU10: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz
CPU11: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4301 MHz

Deep Rybka 4.1 SSE42 x64 (4096 MB)

15.00 0:00 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (1.008.172) 1652
16.00 0:00 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (1.546.919) 1798
17.00 0:01 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (2.376.716) 1924
18.01 0:01 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (3.725.092) 2002
19.01 0:02 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (6.154.372) 2106
20.01 0:04 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (10.365.054) 2203
21.01 0:08 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (17.933.504) 2241
22.01 0:13 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (30.228.176) 2244
23.01 0:19 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (45.536.806) 2280
24.01 0:32 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (75.457.981) 2303
25.01 0:58 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (134.594.762) 2311
25.01 1:02 +M15 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rb1 Qa1+ 9.Rxa1 Ra8 10.Rd1 Ra1 11.Kxa1 Ra8+ 12.Kb2 Ra2+ 13.Nxa2 f2 14.Bh3+ (143.579.545) 2301
best move: Qd3xg6 time: 1:03.266 min n/s: 2.301.839 nodes: 143.579.545
Last edited by kgburcham on Sun Jul 17, 2011 8:37 pm, edited 1 time in total.

zullil
Posts: 6393
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: another hard position (mate in 18) from 1998, by Ed Shrö

Post by zullil » Sun Jul 17, 2011 8:36 pm

kgburcham wrote:
zullil wrote:
kgburcham wrote:
12 threads?
sorry Louis, 4 threads
Impressive work by Rybka 4!

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