Author: Vincent Diepeveen
Date: 14:02:20 09/30/00
Go up one level in this thread
On September 30, 2000 at 00:03:01, Robert Hyatt wrote: >On September 29, 2000 at 23:07:41, Vincent Diepeveen wrote: > >>On September 28, 2000 at 18:10:17, Robert Hyatt wrote: >> >>>On September 28, 2000 at 12:04:05, Vincent Diepeveen wrote: >>> >>>>On September 28, 2000 at 03:10:53, Christophe Theron wrote: >>>> >>>>I solved it WITH nullmove turned on. >>> >>>I don't turn null-move off until no pieces remain, although I restrict >>>it a bit with just one piece. Here is my output: (PII/400 notebook) >> >>that's exactly what i mean! >> >>i don't need those restrictions to solve this! > >Ah but you do. You just have a different restriction. You use a null-move >to prove that a previous null-move would lead to zugzwang. And on occasion, >you "prove" this in an incorrect way, because the second null-move will fail >high, where the first would also have failed high, and there is no zugzwang. In fact diep allows more often a nullmove which saves nodes. >So in effect, you have a 'restriction' as well... you use for endgames with 1 piece a restriction, where i use the general implementation of the nullmove to find zugzwangs. So you work with 'exception implementation' where i go for the general case. >both seem to work... in this position... exactly. > > >> >>> >>> 7-> 0.29 -4.57 1. Rxa6 Rg2+ 2. Kf3 Rg1 3. Kf4 Rb1 >>> 4. Rg6 Rxb4+ 5. Ke5 >>> 8 0.34 -4.68 1. Rxa6 Rg2+ 2. Kf3 Rg5 3. Kf4 Rg4+ >>> 4. Kf3 Rg7 5. Ra1+ Rg1 6. Ra6 Rb1 <HT> >>> 8 0.35 ++ 1. Re1+!! >>> 8 0.35 Mat07 1. Re1+ Rg1 2. Rf1 Rxf1+ 3. Kxf1 a5 >>> 4. bxa5 b4 5. a6 b3 6. a7 b2 7. a8=Q# >>> 8-> 0.36 Mat07 1. Re1+ Rg1 2. Rf1 Rxf1+ 3. Kxf1 a5 >>> 4. bxa5 b4 5. a6 b3 6. a7 b2 7. a8=Q# >>> >>> >>> >>> >>> >>>> >>>>>On September 27, 2000 at 10:50:45, Vincent Diepeveen wrote: >>>>> >>>>>>On September 27, 2000 at 04:45:38, Eduard Nemeth wrote: >>>>>> >>>>>>>[D]8/8/p3R3/1p5p/1P5p/6rp/5K1p/7k w - - 0 1 >>>>>>> >>>>>>>Shredder 4 and Fritz 6a this don't find ! >>>>>>> >>>>>>>Eduard >>>>>> >>>>>>Diep with adaptive double nullmove pruning finds it easily: >>>>>> >>>>>>00:00 28 (0) 1 -5.83 Re6-e1 Rg3-g1 Re1-e7 >>>>>>00:00 30 (0) 1 -4.73 Re6xa6 >>>>>>00:00 76 (0) 2 -4.95 Re6xa6 Rg3-g1 >>>>>>00:00 302 (0) 3 -4.75 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g1 >>>>>>00:00 809 (0) 4 -4.58 Re6xa6 Rg3-g1 Ra6-a8 Rg1-g2 Kf2-f3 >>>>>>00:00 2299 (0) 5 -4.53 Re6xa6 Rg3-g5 Ra6-a1 Rg5-g1 Ra1-a8 Rg1-g2 Kf2-f3 Rg2-g1 >>>>>>00:00 4952 (443) 6 -4.52 Re6xa6 Rg3-g5 Ra6-a1 Rg5-g1 Ra1-a6 Rg1-g2 Kf2-f3 Rg2-g5 >>>>>> Ra6-a1 Rg5-g1 Ra1-a7 Rg1-f1 Kf3-e4 Kh1-g2 >>>>>>00:00 17457 (7143) 7 -4.97 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Kf3-f4 Rg5-g1 Ra6-a2 Rg1- >>>>>>g2 >>>>>>00:00 25462 (7420) 8 -4.58 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 Rg1- >>>>>>b1 Ra8-d8 Rb1-b3 Kf3-f2 >>>>>>00:00 37460 (7816) 9 -4.65 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 Rg1- >>>>>>b1 Kf3-f2 Rb1-b2 Kf2-f3 Rb2-b3 Kf3-f2 >>>>>>00:00 47849 (7967) 10 -4.49 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 Rg1 >>>>>>-g3 Kf3-f2 Rg3-g4 Ra8-a1 Rg4-g1 Ra1-a5 Rg1-g2 Kf2-f3 Rg2-g5 Ra5-a1 >>>>>>00:01 59178 (9578) 11 -4.49 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 Rg1 >>>>>>-g3 Kf3-f2 Rg3-g4 Ra8-a1 Rg4-g1 Ra1-a5 Rg1-g2 Kf2-f3 Rg2-g5 Ra5-a1 >>>>>>00:01 75500 (9982) 12 -4.49 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 Rg1 >>>>>>-g3 Kf3-f2 Rg3-g2 Kf2-f3 Rg2-g1 Kf3-f4 Rg1-e1 Ra8-g8 Re1-f1 Kf4-e5 Rf1-b1 >>>>>>00:01 119501 (14319) 13 -4.49 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 R >>>>>>g1-g3 Kf3-f2 Rg3-g2 Kf2-f3 Rg2-g1 Kf3-f2 Rg1-b1 >>>>>>00:03 292790 (38137) 14 -4.92 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 R >>>>>>g1-f1 Kf3-e3 Rf1-f7 Ra8-g8 Rf7-c7 Ke3-f3 Rc7-c3 Kf3-f2 Rc3-c4 Kf2-f3 Rc4xb4 Rg8- >>>>>>b8 >>>>>>00:04 522912 (63890) 15 -5.02 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 R >>>>>>g1-f1 Kf3-e3 Rf1-f7 Ra8-g8 Rf7-c7 Ke3-f3 Rc7-c3 Kf3-f2 Rc3-c4 Kf2-f3 Rc4-c3 >>>>>>00:08 1121847 (89898) 16 -5.65 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 >>>>>>Rg1-f1 Kf3-e3 Rf1-f7 Ra8-g8 Rf7-c7 Ke3-f3 Rc7-c3 Kf3-f2 Rc3-c4 Kf2-f3 Rc4xb4 Rg8 >>>>>>-e8 Rb4-b3 Kf3-f2 Rb3-b2 Kf2-f3 Rb2-b1 Re8-d8 >>>>>>00:15 2033969 (172871) 17 -5.66 Re6xa6 Rg3-g2 Kf2-f3 Rg2-g5 Ra6-a1 Rg5-g1 Ra1-a8 >>>>>> Rg1-f1 Kf3-e3 Rf1-f7 Ra8-g8 Rf7-c7 Ke3-f3 Rc7-c3 Kf3-f2 Rc3-c4 Rg8-a8 Rc4-f4 Kf >>>>>>2-e2 >>>>>>++ e6-e1 >>>>>>00:15 2089162 (173038) 17 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:15 2098043 (173038) 18 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:16 2117322 (173800) 19 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:16 2136745 (174272) 20 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:16 2181692 (174281) 21 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:17 2240891 (174334) 22 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:17 2267612 (174522) 23 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:18 2301432 (174571) 24 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:18 2335058 (174627) 25 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:19 2414393 (174689) 26 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:20 2491663 (174752) 27 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:20 2530860 (174815) 28 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:21 2591785 (174879) 29 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:22 2663804 (174942) 30 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:23 2754707 (175006) 31 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:24 2822168 (175070) 32 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:25 2854728 (175133) 33 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:26 2915639 (175196) 34 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>>>b5-b4 a5-a6 b4-b3 a6-a7 b3-b2 a7-a8Q >>>>>>00:27 2975900 (175259) 35 MATE07 Re6-e1 Rg3-g1 Re1-f1 Rg1xf1 Kf2xf1 a6-a5 b4xa5 >>>>> >>>>> >>>>> >>>>>It took you 15 seconds to solve it? >>>>> >>>>>I assume you were running Diep on an Apple II ? :) >>>>> >>>>> >>>>> >>>>> Christophe
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