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Up Topic The Rybka Lounge / Computer Chess / Computer moves vs. human moves
- - By dbartol1 (**) Date 2010-02-15 20:49
I keep hearing about computers playing chess differently than humans play.  I find this to be very confussing.  What does this mean?  If the computer makes moves that are strong, why is this different than a human making strong moves.  For example, if I'm playing online chess and move my queen from point A to point B why are there people who make accusations that the move can't be made by a human and must have been made with program assistance.  If the move is legal it seems strange that anyone could distinguish between man and machine.  Strong moves are strong moves.  What am I missing?

Before you ask, i have no example games to show.  I just want clarity on this arguement, since I read posts where players accuse others of cheating.  I don't know how anyone can be so positive their opponent cheats.
Parent - By NATIONAL12 (Gold) Date 2010-02-15 23:20
have fun,you will learn a lot on the forum.
Parent - By NATIONAL12 (Gold) Date 2010-02-15 23:34
go to Rybka lounge,Chess thread and try to follow gambit games that are being played.sometimes you will see a move being played that no human would ever make.this is simply because fast computers can look maybe 20-30 moves deep which apart from endgame no human can calculate.of course moves vary with the strength of different engines,but you get the idea.

best regards Paul.
Parent - - By yanquis1972 (****) Date 2010-02-16 01:10
usually 'computer move' refers to an extravagantly tactical move where a simpler, more natural move would achieve the same ultimate result. this can be especially telling in eg mate or finishing positions -- to best give you an idea i'll use an extreme example -- a potential 'tablebase ending' (where with 6 or 7 pieces on the board a computer might, for examplet sacrifice a queen for no reason obvious to the eye -- but it does so because it knows it leads to a stored 5 or 6 piece ending wins by force).
here is a fantastic article about this history of computer cheating in chess, which also gives an example of what i am talking about.   it is amazing to note that a computer actually beat a GM as far back as 1980, of course this was in a simul & the GM had no idea he was matched against a machine!

Allwermann,Clemens - Kalinitschew,Sergey (2505) [B32]
Boeblingen op 15th Boeblingen (9), 30.12.1999
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 Be7 7.Be2 a6 8.N5c3 Nf6 9.0-0 Be6 10.Be3 0-0 11.Na3 Nd7 12.Qd2 Nc5 13.Nc2 f5 14.exf5 Bxf5 15.Bf3 Kh8 16.Bd5 Qe8 17.Rad1 Qg6 18.Na3 e4 19.f3 exf3 20.Bxf3 Ne5 21.Nd5 Bh4 22.Nf4 Nxf3+ 23.Rxf3 Qe8 24.Nd5 Ne6 25.Rdf1 Qg6 26.b3 Rf7 27.Nc2 Ng5 28.Bxg5 Bxg5 29.Qf2 Bxc2 30.Rxf7 Bf6

r6k/1p3Rpp/p2p1bq1/3N4/2P5/1P6/P1b2QPP/5RK1 w - - 0 31

I showed the position to a number of players in Wijk aan Zee, and all gave me simple wins – for instance 31.Rxb7, 31.Rd7 or even 31.Rxf6. Remember, the first time control is looming and tournament victory is in grasp.

So what does our hero play? 31.Qa7?!! “Fritzy!”
Parent - By Mark Mason (***) Date 2010-02-16 08:38

This is the way that detect cheating  - it may help you understand a bit more. Look under Cheating Issues and Playing Like A Computer:
Up Topic The Rybka Lounge / Computer Chess / Computer moves vs. human moves

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