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Mate in 4 test...
Posted: Sat Apr 26, 2008 2:20 am
by rightrook
[D]8/3KpkPp/7B/8/8/8/8/8 w - - 0 1
Some of my programs (such as Junior 5) set at infinite mode have trouble with this mate in 4....!
regards
Robert
Re: Mate in 4 test...
Posted: Sat Apr 26, 2008 7:21 am
by michiguel
rightrook wrote:[D]8/3KpkPp/7B/8/8/8/8/8 w - - 0 1
Some of my programs (such as Junior 5) set at infinite mode have trouble with this mate in 4....!
regards
Robert
Gaviota (AMD X2 +4600) sees it quickly.
Miguel
Code: Select all
setboard 8/3KpkPp/7B/8/8/8/8/8 w - - 0 1
d
+-----------------+
| . . . . . . . . |
| . . . K p k P p |
| . . . . . . . B |
| . . . . . . . . | Castling:
| . . . . . . . . | ep: -
| . . . . . . . . |
| . . . . . . . . |
| . . . . . . . . | [White]
+-----------------+
analyze
32 1: 0.0 +1.55 Kd7-d8
269 2: 0.0 +1.74 Kd7-c7 e7-e5 Kc7-d6
815 3: 0.0 +1.92 Kd7-c6 e7-e6 Kc6-d6
3501 4: 0.0 +1.78 Kd7-c6 Kf7-g8 Kc6-d5 Kg8-f7
8758 5 0.0 :-) g7-g8=Q
8805 5 0.0 :-) g7-g8=Q
8853 5 0.0 :-) g7-g8=Q
33394 5 0.2 :-) g7-g8=Q
34737 5: 0.2 +Mat_4 g7-g8=Q Kf7xg8 Kd7-e6 Kg8-h8
Ke6-f7 e7-e5 Bh6-g7
36712 6: 0.2 +Mat_4 g7-g8=Q Kf7xg8 Kd7-e6 <-transp
40706 7: 0.2 +Mat_4 g7-g8=Q Kf7xg8 Kd7-e6 <-transp
Re: Mate in 4 test...
Posted: Sat Apr 26, 2008 7:22 am
by Graham Banks
Hi Miguel,
any chance of a new Gaviota?
Regards, Graham.
Re: Mate in 4 test...
Posted: Sat Apr 26, 2008 7:29 am
by sje
Symbolic, 50 milliseconds and without tablebases:
Code: Select all
[SI] (01) Starting the first iteration
[SI] (01) ASRW Centroid: +3.972 Window: [+3.638 +4.305] A/B Adj: 0/0
[PV] 1. Kd8 e5 Score: +3.905
[PV] 1. Kc6 e5 Score: +3.929
[SI] (01) Nodes: 167 Total: 202
[SI] (01) Times: [C: 00.00 U: 00.00] Total: [C: 00.01 U: 00.01]
[SI] (01) F/P: 23.0918 KHz/43.3054 us Mean: 13.547 KHz/73.8168 us
[SI] (01) Utilization rate: 1 Mean: 1
[SI] (01) Finished iteration one
[SI] (02) Starting the second iteration
[SI] (02) ASRW Centroid: +3.929 Window: [+3.595 +4.262] A/B Adj: 0/0
[PV] 1. Kc6 e6 2. Kd6 Score: +3.932
[PV] 1. Kc7 e5 2. Kd6 e4 Score: +3.932
[SI] (02) Nodes: 413 Total: 615
[SI] (02) Times: [C: 00.00 U: 00.00] Total: [C: 00.01 U: 00.01]
[SI] (02) F/P: 87.4259 KHz/11.4383 us Mean: 30.8101 KHz/32.4569 us
[SI] (02) Utilization rate: 1 Mean: 1
[SI] (02) Finished iteration two
[SI] (03) Starting the third iteration
[SI] (03) ASRW Centroid: +3.932 Window: [+3.598 +4.265] A/B Adj: 0/0
[PV] 1. Kc7 Kg8 2. Kc6 e5 Score: +3.751
[PV] 1. Kc6 Kg8 2. Kd5 Kf7 Score: +4.160
[PV] 1. g8=Q+ Kxg8 2. Ke6 Kh8 3. Kf7 e5 Score: +4.265
[SI] (03) Fail high; restarting the third iteration
[SI] (03) ASRW Centroid: +3.932 Window: [+3.598 +5.265] A/B Adj: 0/1
[PV] 1. g8=Q+ Kxg8 2. Ke6 Kh8 3. Kf7 e5 Score: +5.265
[SI] (03) Fail high; restarting the third iteration
[SI] (03) ASRW Centroid: +3.932 Window: [+3.598 +6.598] A/B Adj: 0/2
[PV] 1. g8=Q+ Kxg8 2. Ke6 Kh8 3. Kf7 e5 Score: +6.598
[SI] (03) Fail high; restarting the third iteration
[SI] (03) ASRW Centroid: +3.932 Window: [+3.598 PosInf] A/B Adj: 0/3
[PV] 1. g8=Q+ Kxg8 2. Ke6 Kh8 3. Kf7 e5 4. Bg7# Score: MateIn4
[SI] (03) Nodes: 5,272 Total: 5,887
[SI] (03) Times: [C: 00.02 U: 00.02] Total: [C: 00.04 U: 00.04]
[SI] (03) F/P: 214.737 KHz/4.65687 us Mean: 131.245 KHz/7.61933 us
[SI] (03) Utilization rate: 1 Mean: 1
[SI] (03) Finished iteration three
[SI] (04) Starting the fourth iteration
[SI] (04) ASRW Centroid: MateIn4 Window: [MateIn5 PosInf] A/B Adj: 0/0
[PV] 1. g8=Q+ Kxg8 2. Ke6 Kh8 3. Kf7 e5 4. Bg7# Score: MateIn4
[SI] (04) Nodes: 1,400 Total: 7,287
[SI] (04) Times: [C: 00.00 U: 00.00] Total: [C: 00.04 U: 00.04]
[SI] (04) F/P: 399.315 KHz/2.50429 us Mean: 149.84 KHz/6.6738 us
[SI] (04) Utilization rate: 1 Mean: 1
[SI] (04) Finished iteration four
[SI] (05) Starting the fifth iteration
[SI] (05) ASRW Centroid: MateIn4 Window: [MateIn5 PosInf] A/B Adj: 0/0
[PV] 1. g8=Q+ Kxg8 2. Ke6 Kh8 3. Kf7 e5 4. Bg7# Score: MateIn4
[SI] (05) Nodes: 2,816 Total: 10,103
[SI] (05) Times: [C: 00.00 U: 00.00] Total: [C: 00.05 U: 00.05]
[SI] (05) F/P: 723.535 KHz/1.3821 us Mean: 191.399 KHz/5.22469 us
[SI] (05) Utilization rate: 0.976173 Mean: 1
[SI] (05) Finished iteration five
[TT] Eval: P:3,029 M:1,231 R:0.406405 S:1,798 U:0.000857353
[TT] Hint: P:48 M:0 R:0 S:48 U:0.00585938
[TT] Main: P:6,181 M:3,265 R:0.528232 S:4,383 U:0.00269794
[TT] Pawn: P:1,798 M:1,764 R:0.98109 S:34 U:0.0001297
[TT] TBPr: P:236 M:0 R:0 S:0 U:0
[ST] Nodes: 10,103 Times: [C: 00.05 U: 00.05]
[TB] Tablebase probe count: 0
[ST] F/P: 188.39 KHz/5.30813 us
[ST] Utilization rate: 1
[ST] PV: 1. g8=Q+ Kxg8 2. Ke6 Kh8 3. Kf7 e5 4. Bg7# Score: MateIn4
[ST] Depth: 6 Maximum ply: 9 Termination: EarlyMate
Re: Mate in 4 test...
Posted: Sat Apr 26, 2008 5:32 pm
by michiguel
Graham Banks wrote:Hi Miguel,
any chance of a new Gaviota?
Regards, Graham.
Yes, I am working on it. I do not know when, but whenever I have a version worth releasing, I will do it.
Miguel
Re: Mate in 4 test...
Posted: Sat Apr 26, 2008 7:37 pm
by Roman Hartmann
Thanks for posting this position. Programs without a verification-search after a null-move will fail here. Disabling null-move in positions like that will solve the problem as well.
I was just able to fix a flaw in my verification-search because of that position
best regards
Roman
Re: Mate in 4 test...
Posted: Mon Apr 28, 2008 3:17 pm
by rightrook
Thank you Roman...
I just thought it might be helpful to someone out there....
regards
Robert