Author: Vincent Diepeveen
Date: 16:39:38 09/15/01
Go up one level in this thread
On September 15, 2001 at 19:25:36, Uri Blass wrote: My guess would be that deep blue 1 (being hell slower than version which played in 97) was simply getting at most 10 ply here. Then it probably missed the tactical Bh5 there to be winning (note i find it at 9 ply, fritz at 11, but probably my SE there is lucky and i do not limit it bigtime like DB is known to have done it), and it probably missed that after f3 e3 that this endgame with a piece down is not a good plan to try. So most likely its 10 ply search didn't reveal anything useful and because of that it probably played f3. No superb search. In contradiction an INFERIOR search compared to nowadays 2001 programs. I wouldn't want to try diep 1996 though at this position, i fear a problem then. It might play f3 for the same reason. I didn't have nullmove very well implemented back then, neitehr hashtables were very well working back then. And i sure wouldn't search more than 8 ply in 1997 WMCC at a PII300 with 66Mhz edoram most likely at this position, so a 10 ply search in 1996 was in those days *real* deep. let's not forget that. I got WITH nullmove and 32mb hashtables at a PII300 at the wmcc1996 with a program WITH mobility and such inside its eval a search depth from between 8 and 10 ply. Usually 8 ply at crucial positions. 10 ply when i was kind of lucky with the bounds or in endgame or when it could think for 10 minutes. We must see things in clear perspective. Deep Blue 1 outsearched me bigtime. Deep Blue2 however searched perhaps 1 to 2 ply deeper than DB1. Tactical for sure better, because that 1 or 2 ply more in the software search probably triggered quite some extensions. But if we compare it with today then both machines look pathetic of course, just like my current diep version will look pathetic with diep 2005. >Deep Fritz at depth 14 after 1.f3 Bh5 > >New position >8/p5pk/7p/3rq2b/3Npp2/PPQ2PP1/3R2KP/8 w - - 0 1 > >Analysis by Deep Fritz: > >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qxg3 > µ (-0.91) Depth: 6/19 00:00:00 107kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.h4 Qh2+ 5.Kf1 Qh3+ 6.Kf2 Bg6 7.Qf3 Qh2+ > µ (-0.94) Depth: 7/21 00:00:00 218kN >2.fxe4-- > µ (-1.25) Depth: 8/24 00:00:00 422kN >2.fxe4-- > µ (-1.25) Depth: 8/27 00:00:00 488kN >2.g4! > µ (-1.22) Depth: 8/27 00:00:00 560kN >2.g4-- > -+ (-1.53) Depth: 9/21 00:00:01 1096kN >2.g4-- e3 3.Rd1 Bg6 4.Kh3 Rxd4 5.Qxd4 e2 6.Qxe5 exd1Q > -+ (-2.06) Depth: 9/25 00:00:01 1251kN >2.fxe4! > -+ (-2.03) Depth: 9/25 00:00:01 1387kN >2.fxe4! Qxe4+ 3.Kf2 Qh1 4.gxf4 Qxh2+ 5.Kf1 Qxf4+ 6.Kg1 Qg4+ 7.Kf2 > -+ (-1.59) Depth: 9/27 00:00:02 1829kN >2.gxf4! > -+ (-1.56) Depth: 9/27 00:00:02 2186kN >2.gxf4! Qxf4 3.Kg1 exf3 4.Kf1 Bg4 5.Qd3+ Kh8 6.Qc3 > -+ (-1.53) Depth: 9/27 00:00:03 2370kN >2.gxf4-- > -+ (-1.84) Depth: 10/26 00:00:06 4523kN >2.gxf4-- Qxf4 3.Kg1 Rd6 4.Rg2 Qf6 5.Rd2 Bxf3 6.Qe3 > -+ (-1.87) Depth: 10/26 00:00:06 4815kN >2.fxe4! > -+ (-1.84) Depth: 10/30 00:00:07 5719kN >2.g4! > -+ (-1.81) Depth: 10/30 00:00:11 8482kN >2.g4-- > -+ (-2.12) Depth: 11/28 00:00:14 10717kN >2.g4-- e3 3.Rd1 Bg6 4.Kh3 Rxd4 5.Rxd4 e2 6.Qe1 > -+ (-2.31) Depth: 11/28 00:00:16 12074kN >2.fxe4! > -+ (-2.28) Depth: 11/31 00:00:18 13565kN >2.fxe4 Qxe4+ 3.Kf2 Qh1 4.Qd3+ Bg6 5.Qf3 Qxh2+ 6.Qg2 fxg3+ 7.Kf1 Rh5 > -+ (-2.41) Depth: 12/35 00:00:46 33748kN >2.g4! > -+ (-2.37) Depth: 12/35 00:00:50 36499kN >2.g4! e3 3.Rd1 Bg6 4.Kh3 Rxd4 > -+ (-2.34) Depth: 12/35 00:00:52 37934kN >2.g4-- > -+ (-2.66) Depth: 13/32 00:01:24 61487kN >2.g4-- e3 3.Rd1 Bf7 4.Qc2+ Bg6 5.Qc4 e2 6.Re1 Rxd4 7.Rxe2 Qd6 > -+ (-2.72) Depth: 13/36 00:01:38 71530kN >2.fxe4! > -+ (-2.69) Depth: 13/37 00:02:11 95269kN >2.fxe4! Qxe4+ 3.Kf2 Qh1 4.Qd3+ Bg6 5.Qf3 Qxh2+ 6.Qg2 fxg3+ 7.Kf1 Rh5 > -+ (-2.62) Depth: 13/38 00:02:38 114441kN >2.fxe4-- > -+ (-2.94) Depth: 14/39 00:04:44 204688kN >2.fxe4-- Qxe4+ 3.Kf2 Qh1 4.Qd3+ Kh8 5.gxf4 Qxh2+ 6.Kf1 Qxf4+ 7.Ke1 Qh4+ > -+ (-4.19) Depth: 14/41 00:09:44 406536kN >2.gxf4! > -+ (-4.16) Depth: 14/41 00:11:02 463509kN >2.gxf4! Qxf4 3.Kf1 e3 4.Re2 Bxf3 5.Rxe3 Bh1+ 6.Nf3 Rf5 > -+ (-3.62) Depth: 14/41 00:12:06 505085kN >2.g4! > -+ (-3.59) Depth: 14/41 00:12:20 514401kN >2.g4! e3 3.Rd1 Bf7 4.b4 e2 5.Re1 Rxd4 6.Qc2+ > -+ (-2.66) Depth: 14/41 00:13:25 557294kN > >(Blass, Tel-aviv 16.09.2001) > >The evidence suggests that Deep Fritz is going to find 1.f3 >at depth 15. > >I do not say that the reasons are idntical to the reasons of >Deep blue. > >Uri > >Uri
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