Author: Dann Corbit
Date: 23:18:23 05/07/02
Go up one level in this thread
On May 08, 2002 at 01:31:36, Dann Corbit wrote: >On May 07, 2002 at 15:09:57, Ernst Walet wrote: > >>On May 07, 2002 at 14:18:50, Dann Corbit wrote: >> >>>On May 05, 2002 at 13:55:00, Heiner Marxen wrote: >>> >>>>On April 28, 2002 at 22:00:22, Heiner Marxen wrote: >>>> >>>>>On April 28, 2002 at 18:18:38, Heiner Marxen wrote: >>>>> >>>>>>On April 28, 2002 at 08:00:15, Vincent Vega wrote: >>>>>> >>>>>>>Simplified position to show the bug: >>>>>>>[D]8/8/8/8/8/8/4KP2/R1Qn3k w - - 0 1 >>>>>>> >>>>>>>This is a mate in 2 (1. Qxd1+). >>>>>>> >>>>>>>But CHEST says: >>>>>>> >>>>>>>CHEST version 3.19, 18-Dec-1999 >>>>>>>Input file: 'xx' >>>>>>>Reading job: >>>>>>># xx >>>>>>>W: Ke2 Qc1 Ra1 Pf2 (4) >>>>>>>B: Kh1 Nd1 (2) >>>>>>>FEN: 8/8/8/8/8/8/4KP2/R1Qn3k w - - >>>>>>>analysing (mate in 2 moves): >>>>>>>No solution in 2 moves. >>>>>>>refu 1: Qxd1+ -- [ 1-] M2: move >>>>>>>refu 2: Qc6+ -- [ 1-] M2: move >>>>>>>refu 3: Qh6+ Kg1 [ 1-] >>>>>>>refu 4: f3 -- [ 1-] M2: move >>>>>>>refu 5: f4 -- [ 1-] M2: move >>>>>>>refu 6: Rb1 -- [ 1-] M2: move >>>>>>>refu 7: Ra2 -- [ 1-] M2: move >>>>>>>refu 8: Ra3 -- [ 1-] M2: move >>>>>>>refu 9: Ra4 -- [ 1-] M2: move >>>>>>>refu 10: Ra5 -- [ 1-] M2: move >>>>>>>refu 11: Ra6 -- [ 1-] M2: move >>>>>>>refu 12: Ra7 -- [ 1-] M2: move >>>>>>>refu 13: Ra8 -- [ 1-] M2: move >>>>>>>refu 14: Qb1 -- [ 1-] M2: move >>>>>>>refu 15: Qc2 -- [ 1-] M2: move >>>>>>>refu 16: Qc3 -- [ 1-] M2: move >>>>>>>refu 17: Qc4 -- [ 1-] M2: move >>>>>>>refu 18: Qc5 -- [ 1-] M2: move >>>>>>>refu 19: Qc7 Kg1 [ 1-] >>>>>>>refu 20: Qc8 -- [ 1-] M2: move >>>>>>>refu 21: Qd2 -- [ 1-] M2: move >>>>>>>refu 22: Qe3 -- [ 1-] M2: move >>>>>>>refu 23: Qf4 Kg1 [ 1-] >>>>>>>refu 24: Qg5 -- [ 1-] M2: move >>>>>>>refu 25: Qb2 -- [ 1-] M2: move >>>>>>>refu 26: Qa3 -- [ 1-] M2: move >>>>>>>refu 27: Kd2 -- [ 1-] M2: move >>>>>>>refu 28: Ke1 -- [ 1-] M2: move >>>>>>>refu 29: Kf3 -- [ 1-] M2: move >>>>>>>refu 30: Kxd1 -- [ 1-] M2: move >>>>>>>refu 31: Kf1 Ne3+ [ 1-] >>>>>>>refu 32: Kd3 -- [ 1-] M2: move >>>>>>>Time (virt) = 0.000 sec >>>>>> >>>>>>Sadly, I have to confirm this fact: this is a bug in Chest. >>>>>>If I specify option "-2" to suppress the "2-mate-heuristic", it finds the >>>>>>mate in 2: >>>>>> >>>>>> Qxd1+ Kh2 Qh1# >>>>>> Kg2 Qh1# >>>>>> >>>>>>Hence, the bug is in the "mate2" module. Since that one is a really complex >>>>>>one, it will take some time to track it down. >>>>>>When I have found it, I will report under what circumstances it does appear. >>>>> >>>>>Fortunately, I could track down this bug. >>>> >>>>[snip] >>>>>It is quite easy to correct this bug, and within the next week I will >>>>>provide a corrected source module. >>>>>It will be announced here, and be available through my web page. >>>> >>>> http://www.drb.insel.de/~heiner/Chess/chest.html >>>> >>>>contains a reference to the corrected source code "mate2.c": >>>> >>>> http://www.drb.insel.de/~heiner/Chess/mate2.c >>>> >>>>>Hopefully Dann will then provide a corrected win32 executable. >>>>>Since the circumstances for the bug to occur are not really very rare, >>>>>I'd recommend upgrading to the new version when available. >>>> >>>>I can't speak for Dann, but it would be very nice of him to offer >>>>an updated source package, and more importantly, a corrected binary. >>>>(I myself cannot compile for windows). >>> >>>Everything: >>>ftp://cap.connx.com/pub/chess-solvers/chest/ >>> >>>The package in a zip: >>>ftp://cap.connx.com/pub/chess-solvers/chest/CHEST319.ZIP >>> >>>The binary only: >>>ftp://cap.connx.com/pub/chess-solvers/chest/chest319.exe >> >> >>Dan, when accessing the first link, I immediately get attacked by a trojan >>horse. This is the message drom my fire wall: >> >>Soket de Trois v1. Trojan horse at cap.connx.com (209.20.248.158) >> >>Maybe you should check your server? > >I shut down my ftp site, and I am running the virus scanner over all drives. >Pretty strange that it did not get diagnosed. >I have McAfee Virus Scan 4.5.1, and it gets updated over the net every night. I searched my registry for mschv32.* and did not find anything. I searched all hard drives my system has access to for mschv32.* and it is not found anywhere. I have several million files on my total available disk storage, so the virus scan will run for 15 hours or so.
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