Author: Mike S.
Date: 21:47:21 12/15/02
Go up one level in this thread
On December 15, 2002 at 22:32:30, John Merlino wrote: >On December 15, 2002 at 21:57:45, Art Basham wrote: > >>Gambit Tiger takes 11 ply to find.... >>1.....Bd3! (Opening the g file for the Rook)... >>If 2. QxB, Rg1+ wins for black! >>[D]2k1r1r1/1pb2p2/p5b1/2qP4/2P2P2/4pP1p/P3Q2P/2RBRN1K b - - 0 1 > >CM9000, on a P3-733, finds it in five seconds: > >Time Depth Score Positions Moves >(...) >0:05 1/8 -4.58 394611 1...Bd3 2.Qxd3 Rg1+ 3.Kxg1 e2+ > 4.Ne3 Rxe3 5.Kh1 Rxd3 6.Rxe2 Rxd5 > 7.cxd5 Qxc1 >0:07 1/9 -4.53 599248 1...Bd3 2.Qxd3 Rg1+ 3.Kxg1 e2+ > 4.Ne3 Rxe3 5.Kh1 Rxd3 6.Rxe2 Rxd5 > 7.cxd5 Qxc1 8.Re8+ Kd7 >0:15 1/10 -5.27 1282458 1...Bd3 2.Qxd3 Rg1+ 3.Kxg1 e2+ > 4.Ne3 Rxe3 5.Kh1 Rxd3 6.Bxe2 Qf2 > 7.Bf1 Qxf3+ 8.Kg1 Qxf4 9.Rc2 >0:57 2/11 -7.60 4797308 1...Bd3 2.Ng3 Bxe2 3.Nxe2 Ba5 4.Rf1 > Bd2 5.Rc2 Rg2 6.f5 b6 7.f4 >1:45 3/12 -7.72 9335773 1...Bd3 2.Ng3 Bxe2 3.Nxe2 Ba5 4.Rf1 > Rg2 5.Ba4 Re7 6.Rc2 Qa3 7.Bb3 f5 >5:03 4/13 -7.81 29015675 1...Bd3 2.Ng3 Bxe2 3.Nxe2 Rg2 4.Bc2 > Ba5 5.Bf5+ Kb8 6.Bxh3 Rf2 7.Nc3 > Qxc4 8.Ne4 Qxa2 > >You should note that different programs report their search depth differently. >Fritz, from what I've been told, reports the MAXIMUM extension depth for the >given PV, whereas CM reports the MINIMUM extension depth. Other programs, like >Gambit Tiger, might do something different. I assume you mean the second number, which is displayed after the slash. I always wondered how The King remains in small depths (I mean the value before the slash), but still sees much, like above. Is it correct that the number before the slash basically is meant to be the "complete" of the search depth basically, while after the slash the extension's depth - min. or max. - is given? (I'm aware that "complete" will include forward pruning etc. too.) Another question (to Art), this seems a very nice tactical test position. Do you have source infos (game, tournament etc.)? Thanks, M.Scheidl P.S. List 5.04, P3/700 Mhz, 64 MB hash: Analysis by List 504: 1...Qa3 2.Bc2 Bxf4 3.Bxg6 Rxg6 4.Red1 ³ (-0.53) Depth: 5 00:00:00 8kN ³ (-0.40) Depth: 5 00:00:00 10kN 1...Bxf4 2.Rc3 Re5 3.Bb3 Kb8 4.Rxe3 Bxe3 5.Nxe3 Qd6 µ (-0.80) Depth: 5 00:00:00 11kN -+ (-1.72) Depth: 9 00:00:03 1139kN 1...Qd4 2.f5 Bxf5 3.Nxe3 Bd3 4.Qf2 Rg2 5.Nxg2 hxg2+ 6.Kxg2 Rg8+ 7.Qg3 Qb2+ 8.Be2 -+ (-2.12) Depth: 9 00:00:04 1631kN -+ (-3.56) Depth: 12 00:00:20 8381kN 1...Bd3 2.Ng3 Bxe2 3.Nxe2 Rg2 4.Ba4 Rh8 5.Bc2 Ba5 6.Nc3 e2 7.Bf5+ Kb8 -+ (-3.96) Depth: 12 00:00:22 9337kN -+ (-7.45) Depth: 14 00:01:53 51117kN
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