Mate in 4 test...
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Mate in 4 test...
[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
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...
Gaviota (AMD X2 +4600) sees it quickly.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
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
- Graham Banks
- Posts: 33245
- Joined: Sun Feb 26, 2006 9:52 am
- Location: Auckland, NZ
Re: Mate in 4 test...
Hi Miguel,
any chance of a new Gaviota?
Regards, Graham.
any chance of a new Gaviota?
Regards, Graham.
My email addresses:
gbanksnz at gmail.com
gbanksnz at yahoo.co.nz
gbanksnz at gmail.com
gbanksnz at yahoo.co.nz
Re: Mate in 4 test...
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...
Yes, I am working on it. I do not know when, but whenever I have a version worth releasing, I will do it.Graham Banks wrote:Hi Miguel,
any chance of a new Gaviota?
Regards, Graham.
Miguel
- Roman Hartmann
- Posts: 295
- Joined: Wed Mar 08, 2006 7:29 pm
- Contact:
Re: Mate in 4 test...
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
I was just able to fix a flaw in my verification-search because of that position

best regards
Roman
Re: Mate in 4 test...
Thank you Roman...
I just thought it might be helpful to someone out there....
regards
Robert
I just thought it might be helpful to someone out there....


regards
Robert