Author: Robert Hyatt
Date: 17:49:03 05/21/98
Go up one level in this thread
On May 21, 1998 at 11:34:28, Bernhard Bauer wrote: >On May 21, 1998 at 08:21:13, Robert Hyatt wrote: > >>On May 21, 1998 at 07:01:18, Georg Langrath wrote: >> >>>6k1/8/p3r2p/1p1pPpp1/1n1pP3/1Pq4P/PR4PB/3QN1K1 b >>> >>>This epd-file represents a position between Spassky-Tal 1959. Spassky >>>took the rook 1 Dxb2, and who hadn t. But this is wrong. Even if you >>>play white with a weaker chessprogram against black with a stronger one, >>>white wins after that move.. The best move is 1 dxe4. On the opposite, >>>here a weaker black program always wins over a stronger black program >>>after that move. >>> >>>I wrote about the position in PLY (SSDF) about eight years ago. Even the >>>strongest chessprograms didn t find the right move in those days. Not >>>even in analyze for a week or so. Does you program find it? Rebel9 find >>>it in analyze, but not in 3 minutes on my computer (Pentium 133). >>> >>>But Fritz 5 find the right move in about 10 seconds, and doesn t change >>>its mind then! Nearly unbelievable. >>> >>>I have tested Fritz5 on the selfgoing update, and now I have ordered it. >>>Perhaps Chessbase shouldn t be in a such hurry to put it away, when they >>>found that it was possible to make it selfgoing. (You have to put two >>>files to it from Cblight only). >>> >>>Not only I had buyed it after testing it, I think. >>> >>>Georg >> >> >>This seems easy for today's programs, if they have the right kind of >>evaluation: >> >> depth time score variation (1) >>starting thread 1 >>starting thread 2 >>starting thread 3 >> 1 0.01 0.09 1. ... Qxb2 2. exf5 >> 1-> 0.01 0.09 1. ... Qxb2 2. exf5 >> 2 0.01 0.09 1. ... Qxb2 2. exf5 >> 2-> 0.01 0.09 1. ... Qxb2 2. exf5 >> 3 0.02 -0.08 1. ... Qxb2 2. exf5 Rc6 >> 3-> 0.02 -0.08 1. ... Qxb2 2. exf5 Rc6 >> 4 0.03 ++ 1. ... Qxb2!! >> 4 0.03 0.89 1. ... Qxb2 2. exf5 Rc6 3. Qg4 Qxa2 >> 4-> 0.04 0.89 1. ... Qxb2 2. exf5 Rc6 3. Qg4 Qxa2 >> 5 0.04 0.89 1. ... Qxb2 2. exf5 Rc6 3. Qg4 Qxa2 >> 5-> 0.09 0.89 1. ... Qxb2 2. exf5 Rc6 3. Qg4 Qxa2 >> 6 0.10 -- 1. ... Qxb2 >> 6 0.12 0.64 1. ... Qxb2 2. exf5 Rc6 3. e6 Qxa2 >> 4. e7 Rc8 >> 6-> 0.15 0.64 1. ... Qxb2 2. exf5 Rc6 3. e6 Qxa2 >> 4. e7 Rc8 >> 7 0.22 0.78 1. ... Qxb2 2. exf5 Rc6 3. Qh5 Kf8 >> 4. e6 Qxa2 >> 7-> 0.31 0.78 1. ... Qxb2 2. exf5 Rc6 3. Qh5 Kf8 >> 4. e6 Qxa2 >> 8 0.37 -- 1. ... Qxb2 >> 8 0.58 0.13 1. ... Qxb2 2. exf5 Re7 3. a4 Rf7 4. >> g4 bxa4 5. bxa4 d3 >> 8-> 1.42 0.13 1. ... Qxb2 2. exf5 Re7 3. a4 Rf7 4. >> g4 bxa4 5. bxa4 d3 >> 9 1.61 0.19 1. ... Qxb2 2. exf5 Re7 3. a4 Rf7 4. >> g4 Qc3 5. e6 Rf6 >> 9 3.33 0.29 1. ... dxe4 2. Qd2 Qxd2 3. Rxd2 d3 >> 4. a3 Nc6 5. Kf2 Kf7 6. Ke3 Nxe5 >> 9-> 4.00 0.29 1. ... dxe4 2. Qd2 Qxd2 3. Rxd2 d3 >> 4. a3 Nc6 5. Kf2 Kf7 6. Ke3 Nxe5 >> 10 6.01 0.21 1. ... dxe4 2. Rd2 d3 3. Kh1 Re7 4. >> a3 e3 5. Nf3 e2 6. Qe1 Nd5 >> 10-> 8.68 0.21 1. ... dxe4 2. Rd2 d3 3. Kh1 Re7 4. >> a3 e3 5. Nf3 e2 6. Qe1 Nd5 >> 11 13.83 0.42 1. ... dxe4 2. Rd2 d3 3. h4 Re7 4. >> hxg5 e3 5. Rxd3 Nxd3 6. Nxd3 hxg5 >> 11-> 19.32 0.42 1. ... dxe4 2. Rd2 d3 3. h4 Re7 4. >> hxg5 e3 5. Rxd3 Nxd3 6. Nxd3 hxg5 >> 12 37.43 0.40 1. ... dxe4 2. Qd2 Qxd2 3. Rxd2 d3 >> 4. a3 Nc6 5. Nxd3 exd3 6. Rxd3 Nxe5 >> 7. Bxe5 Rxe5 8. Rd7 >> 12-> 59.54 0.40 1. ... dxe4 2. Qd2 Qxd2 3. Rxd2 d3 >> 4. a3 Nc6 5. Nxd3 exd3 6. Rxd3 Nxe5 >> 7. Bxe5 Rxe5 8. Rd7 > >I'm always wondering when I see your output. > >1. My Crafty (15.8) gives imidiatly Qxb2 by book (book on). So the book > (wall.pgn) has an error? no... this position probably came from a real game, which is in wall.pgn no doubt. Because of this happening *many* times, when I run these positions, I run them in a directory with a .craftyrc that has "book off" to avoid this stuff... otherwise a couple of the WAC solutions get booked, as well as a few of the ECM (and others). book off stops that stuff... >2. With book=off my Crafty version finds dxe4 on ply 10 after 18.52 sec. > I'm running 15.8 also, but using a 4 processor machine, which is quite fast, as you can tell... Bob >Anyway, Crafty is a great analysis tool. I like it. > >Kind regards >B. Bauer
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