Author: Dann Corbit
Date: 23:26:52 05/07/02
Go up one level in this thread
On May 08, 2002 at 02:18:23, Dann Corbit wrote: >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. None of the following are located anywhere on my system: rsrcload.exe mgadeskdll.exe csmctrl32.exe So it would appear that I do not have any of the variants. Still running the virus scanner (which won't complete until tomorrow)
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