Author: Uri Blass
Date: 19:40:37 05/06/01
Go up one level in this thread
On May 06, 2001 at 20:33:52, Vincent Diepeveen wrote: >On May 06, 2001 at 02:28:14, Uri Blass wrote: > >>I gave Deep Fritz to analyze similiar number of nodes to Deeper blue and Deep >>Fritz seems to be clearly better in tactics. > >Hi Uri, > >Here another tactical horizon effect of Deep Blue and that >is when the first search line shows up about the f5 move at move 28. > >This line shows up in deep blue at move 27 of black at 10 ply. > >black timeleft=27:46.40.00 > - = - r r = k = d3xe4 20 Bd6-c5 > = o = n = o = - Nf1-e3 21 Ra8-d8 > - q o = - = - o Nh2-f1 22 g5-g4 > o - = - o - b b h3xg4 23 Nf6xg4 > - = - = O = - = f2-f3 24 Ng4xe3 > O O = - N O O - Nf1xe3 25 Bc5-e7 > - B O = R = B = Kg1-h1 26 Be7-g5 > R - Q - = - = K Re1-e2 27 ... >white timeleft=27:46.40.00 >black to move type 'help' for command overview > >clean >Clearing all Hashtables... >anal >Analysis mode is on >Process 1: engineflags=256 msk=1 >process 0: engineflags = 256 denktime=10000000 maxtime=10000000 >White can win here 0 worth of material >Black can win here 0 worth of material >00:00 0 0 7 (0) 1 -0.15 Bg5xe3 Qc1xe3 >00:00 0 0 13 (0) 1 0.64 Re8-e7 >00:00 0 0 14 (0) 1 0.84 Qb6-c5 >00:00 0 0 17 (0) 1 0.88 Nd7-f6 >00:00 0 0 18 (0) 1 1.01 Nd7-c5 >00:00 0 0 19 (0) 1 1.04 Bh5-g6 >00:00 0 0 33 (0) 1 1.08 Kg8-h7 >00:00 0 0 36 (0) 1 1.13 Kg8-f8 >00:00 0 0 102 (0) 2 0.93 Kg8-f8 Kh1-h2 >00:00 0 0 379 (0) 3 1.20 Kg8-f8 Kh1-h2 Bh5-g6 >00:00 0 0 1988 (391) 4 0.83 Kg8-f8 Kh1-g1 a5-a4 b3xa4 >++ g8-h7 >00:00 0 0 3025 (981) 4 0.87 Kg8-h7 Kh1-g1 Re8-g8 Kg1-f2 >++ d7-c5 >00:00 0 0 7015 (2310) 4 1.09 Nd7-c5 Re2-e1 Kg8-f8 a3-a4 >++ a5-a4 >00:00 0 0 9443 (2991) 4 1.13 a5-a4 g3-g4 Qb6-a6 Qc1-f1 Bh5-g6 >00:00 0 0 16154 (3362) 5 0.92 a5-a4 Qc1-e1 Bh5xf3 Ne3-c4 Bf3xg2 Kh1xg2 >++ g8-h7 >00:00 0 0 26742 (8032) 5 1.03 Kg8-h7 Qc1-g1 Qb6-a6 Ne3-c4 b7-b5 >++ g8-f8 >00:00 0 0 31308 (8497) 5 1.07 Kg8-f8 Qc1-g1 Qb6-a6 Ne3-c4 b7-b5 >++ d7-f6 >00:01 0 0 42949 (11481) 5 1.13 Nd7-f6 Re2-e1 Kg8-f8 f3-f4 e5xf4 g3xf4 >00:02 0 0 76128 (16961) 6 0.18 Nd7-f6 Qc1-e1 Bg5xe3 Re2xe3 Kg8-f8 Kh1-g1 >++ g8-f8 >00:02 0 0 98174 (24532) 6 0.62 Kg8-f8 Qc1-e1 a5-a4 Ne3-c4 Qb6-c5 Bb2-c3 a4xb3 c2 >xb3 >++ a5-a4 >00:03 0 0 142640 (40777) 6 0.69 a5-a4 Qc1-e1 a4xb3 Ne3-f5 Kg8-f8 Qe1-b4 Qb6xb4 a >3xb4 >00:06 0 0 281030 (55413) 7 0.92 a5-a4 Qc1-e1 a4xb3 Ne3-c4 Qb6-c7 c2xb3 Nd7-c5 >00:10 0 0 544013 (91108) 8 0.70 a5-a4 Qc1-e1 a4xb3 Ne3-c4 Qb6-c7 c2xb3 Nd7-c5 Qe >1-b4 >00:28 0 0 1753700 (112361) 9 0.89 a5-a4 Qc1-e1 a4xb3 Ne3-c4 Qb6-c7 c2xb3 Nd7-c5 >Qe1-a5 Qc7-e7 >00:48 0 0 3077596 (152700) 10 0.80 a5-a4 Qc1-e1 a4xb3 Ne3-c4 Qb6-c7 c2xb3 Nd7-c5 > Qe1-a5 Qc7xa5 Nc4xa5 >04:12 0 0 17109023 (1591321) 11 0.68 a5-a4 b3-b4 f7-f5 e4xf5 e5-e4 f3-f4 Bg5xf4 >Re2-e1 Bf4xg3 Ne3-c4 Bh5-d1 >09:29 0 0 38492751 (3065091) 12 0.68 a5-a4 b3-b4 f7-f5 e4xf5 e5-e4 f3-f4 Bg5xf4 >Re2-e1 Bf4xg3 Ne3-c4 Bh5-d1 > >So at 11 ply diep shows same mainline. Now this version of diep has not >much recapture extensions. I threw those out. Took too many nodes in >average middlegame to extend most recaptures. > >--------------------------------------- >--> re1e2 <-- >--------------------------------------- > -34 T=21 >Pa5a4 pb3b4 Pc6c5 qd2e2 Bg5e3n qe2e3B Pc5b4p bb2c1 Pb4a3p pg3g4 Bh5g6 ra1a3P >Qb6e3q > 3(4) -9 T=0 >Pa5a4 pb3a4P Nd7c5 > 4(5) -9 T=0 >Pa5a4 pb3a4P Nd7c5 > 5(5)[a4](-3) -3 T=0 >Pa5a4 pb3a4P Nd7c5 > 6(5)[a4](-26)[Qc5](-25) -25 T=0 >Qb6c5 qc1g1 Qc5b5 > 7(5) #[Qc5](-41)##########################[a4](-8)####### -8 T=3 >Pa5a4 qc1e1 Pa4b3p ne3c4 Qb6c7 pc2b3P > 8(6)<ch> 's 60' > #[a4](7)################################## 7 T=8 >Pa5a4 pg3g4 Bh5g6 qc1e1 Pa4b3p ne3c4 Qb6c7 pc2b3P Nd7c5 > 9(6) #[a4](15)################################## 15 T=39 >Pa5a4 pg3g4 Bh5g6 pb3b4 Ph6h5 pg4h5P Bg6h5p qc1e1 Bg5f4 ne3f5 >10(6) #[a4](-15)[a4](-15) -15v T=112 >Pa5a4 pb3b4 Pf7f5 pe4f5P Pe5e4 pf3f4 Bg5f4p pg3f4B Bh5e2r qc1d2 Be2f3 ra1g1 >10(6) #[a4](-20)[TIMEOUT][et3 946 sec]################################## -20 >T=195 >Pa5a4 pb3b4 Pf7f5 pe4f5P Pe5e4 pf3f4 Bh5e2r pf4g5B Nd7e5 pg5g6 Qb6c7 qc1b1 Kg8g7 >pg3g4 Be2f3 >--------------------------------------- >--> 27. .. a4 <-- 13/55:48 >--------------------------------------- > >As you see Deep Blue gets it 1 ply sooner as DIEP. It gets it at 10 ply >versus DIEP 11 ply. > >This amazing similarity in mainlines i already saw directly when i added >loads of what Hsu calls dangerous extensions. > >Of course DIEP runs on a PC and it's 2001 now, so i don't want my search >to completely die because of extensions. So i limit them bigtime all. > >So diep needs 1 ply extra usual as Deep Blue to get the same mainlines, >though usual it's the same. > >This mainline is so important because it shows the tactical horizon effect >a4 b4 f5!? from black. > >28..f5 is getting into the lost position as the rest is a forced win for >white. I believe that the losing mistake of black is only later. I believe that 33...Qb5 was a wrong move and Deep Fritz suggets 33...Rd6 with evaluation of 0.00 after some hours see http://www.icdchess.com/forums/1/message.shtml?167877 Uri
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