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Crafty (Computer) vs Deep Junior (Computer)
CCT 12 (2010), FICS, rd 3, Feb-20
French Defense: Normal Variation (C00)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Apr-27-10  rapidcitychess: Normal varition?
Apr-27-10  braimondi: Cool this normal variation lol
Apr-27-10  weisyschwarz: What would the abnormal variation look like?
Apr-27-10  rapidcitychess: You don't wna't to know....The Van Goom Gambit.(pssst...It is in the 60's of Chess Life. Yes I'm old :b)
Apr-28-10  Jamboree: What a strange game. Well, I suppose it's not really a "game" precisely, since it's really just two computers testing out which one has better software loaded onto it.

What seems to be happening is that Deep Junior can see a certain number of plies ahead, and keeps going off on these bizarre tactical lines in which it can see a way to recoup sacced material after x number of moves -- but that Crafty can see just a little bit further ahead, and therefore can see the refutation that Deep Junior can't -- so that after a couple moves into each tactical foray, Deep Junior suddenly "realizes" that the line doesn't work since the final conclusion at last appears on its analysis horizon. So then Deep J abandons the combination and immediately launches into another wild almost-sound combination -- which Crafty then promptly debunks before Deep J can even get to the point.

That explain crazy-looking moves likes black's 16. ... Nxc4, which just throws away a piece after 17. Qxh5. Black had obviously foreseen a tactical victory or at least way to recoup the piece, within its limited computational range, probably thinking that after 18. ...Qe5 there were just too many threats for White to handle...but unfortunately, not only is the combination unsound, but Crafty had already seen ahead of time that it was unsound, because after the ugly-looking "computer-move" 19.Kg1, White is apparently able to hold on to the material and wait out the fizzling attack.

Anyway, worth playing through, if only to understand how computers "think" during a game.

Apr-28-10  kingfu: This is not a French at all.
May-02-10  rapidcitychess: <kingfu> It would be more accurate to label it as a Owen's Defense.
May-05-10  kingfu: Or maybe some convoluted Dutch defense. Transposition is over rated!
May-05-10
Premium Chessgames Member
  thegoodanarchist: Does anyone know how resignation works in these matches?

Is there a particular eval score at which the game is called, or does a human representative of the software company make the call?

May-08-10  rapidcitychess: <tga> Crafty resigns when it goes below 5.00 for itself. Same with Fritz. I'm not sure about Junior.

RCC

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