Author: Chris Taylor
Date: 07:27:36 09/05/99
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On September 05, 1999 at 07:48:34, Ed Schröder wrote: >Yesterdays game was a disaster. From the very first move the program >was handicapped by a not optimal running PC. The first sign was a not >working LIVE support. Instead of showing the Rebel-Hoffman game the >LIVE support showed an old logfile that was used to test the LIVE support. > >When Rebel was out of book on move (after 15..Rb7) the machine >immediately crashed. The PC in this game crashed in total 10 times >resulting in an enormous time loss on the clock and the loss of the >permanent brain 10 times too. > >The most worse error in the game was on move 40. Rebel played >40. Rg4 showing a score of +2.30 in favor of Rebel. This is of course >total nonsense as GM Hoffman had a clear advantage in that stage of >the game. > >I then changed to the version that played GM Sorín and GM Rohde that >had run rock solid. Of course it was already to late as Rebel already >was in trouble. > >Surprisingly this version played the game till the end without any crash >which made me conclude Rebel was to blame for the crashes. This >was a premature conclusion. Testing the machine overnight proved >that the Sorín / Rohde version also crashed. > >This morning I started to run a special Rebel version that checks the >reliability of a PC. It's done via the "Analyze EPD" function which (also) >displays the number of nodes searched in the EPD logfile. > >An EPD file was made containing the 40.Rg4 position 500 times, the >PLY=10 instruction of "Analyze EPD" ensures that all of the position >must have the same number of positions searched. > >The test is running now on 8 PC's, 4 x Pentium-II 266, 2 x Pentium-II 450, >1 x AMD-333 and the KryoTech AMD-600 machine. Sofar (a few hours) >the test shows that all PC's are okay except the KryoTech. > >The outcome of the 40.Rg4 position should be: 40.b3 (and not Rg4) >and 34.606.181 nodes searched. On all machines this is the case expect >the Kryotech machine which a) displays different numbers of nodes from >time to time or b) worse simply crashes. > >The sad news about this is that the Rebel-Hoffman game isn't reliable >to count it for the original goal of the GM challenge which is to discover >the current state of art of the micro's (Rebel in this case) against >grandmasters in their strongest area, playing on tournament time control. >Yesterdays game was simply a lost chance and month. Of course the >game result (0-1) remains this includes the financial consequences as >well. > >I will run the test for 24 hours as after the nightmare of yesterday I tend to >mistrust trust every PC now. Next month Rebel will run on another PC >during the GM challenge as I just must have a proper working PC on which >I can rely or otherwise this whole GM challenge makes no sense. > >Below is the game in PGN. > >Ed Schroder > >------------------------------------------------ > >[Event "Monthly GM Challenge"] >[Site "Internet Game 40/2:00"] >[Date "1999.09.04"] >[Round "?"] >[White "Rebel Century"] >[Black "GM A. Hoffman"] >[Result "0-1"] >[WhiteElo "?"] >[BlackElo "?"] >[ECO "A58"] > >1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. Nf3 d6 >8. e4 Bxf1 9. Kxf1 Bg7 10. g3 O-O 11. Kg2 Nbd7 12. Re1 Qb6 13. h3 Rfb8 >14. Re2 Ne8 15. Bf4 Rb7 16. Qc1 Nc7 17. Bh6 Bh8 18. a4 Qa6 19. Ra2 Rab8 >20. Re1 Rb4 21. Qc2 Ne5 22. Nxe5 Bxe5 23. f4 Bd4 24. Bg5 f6 25. Bh4 Qc4 >26. Re2 Rb3 27. Nd1 Rxg3+ 28. Bxg3 Qxa2 29. Bf2 Bxf2 30. Rxf2 Rb4 31. Nc3 >Qc4 32. f5 Qd4 33. fxg6 hxg6 34. Qe2 Kf7 35. Kh1 Rb8 36. Rg2 Rh8 37. Qg4 >g5 38. Qf3 Qe5 39. Rg1 Na6 40. Rg4 c4 41. Kg2 Nc5 42. Qf5 Qd4 43. Kh2 Qe3 >44. Rg2 Nd3 45. Nd1 Qc1 46. Nc3 Ne5 47. Ne2 Qxb2 48. a5 Qa3 49. Qe6+ Kf8 >50. Nd4 Qc3 51. Qc8+ Kg7 52. Nf5+ Kh7 53. Qb7 Nf3+ 54. Kg3 Nh4+ 55. Kh2 >Qe5+ 56. Rg3 Nxf5 57. exf5 Kg7 58. Qa7 c3 59. Qe3 Rc8 60. Qxe5 dxe5 61. >Rg1 Ra8 62. Ra1 c2 63. Rc1 Rxa5 64. Rxc2 Rxd5 0-1 Dear Ed It can be said that this gives you a chance to learn from a bad situation, and come out better prepared next time? I certainly know from running Rebel 9, and 10, that you put out a quality product!! This may yet help you to get Revel Century, in the league of Grand Master. If not the best at beating GM's then at least in giving them a dam good game! Should I be of Grand Master standard, I would be proud to use Rebel as a sparring, and a testing partner. I know you will find out why, and put it right...... Then Rebel Century can give another GM a fright, if not gain it's first scalp!! Chris Taylor Notts England
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