Chess CPU usuage

Discussion in 'MacBook Pro' started by virtual, Dec 16, 2006.

  1. virtual macrumors member

    Joined:
    Sep 30, 2006
    Location:
    Brazil
    #1
    I went to play chess today, the default chess.app in the Application folder and it would drain the CPU.

    So I opened Activity monitor to see what was going on. It wasn't the chess app that was the problem, but the process sjeng which was using 99% CPU. Is this process which "talks" to you? I looked in the processes and it was set so that it wouldn't speak the moves.

    Does anyone else have this problem who managed to fix it, or have any suggestions as to what to do?

    Thanks,
    virtual.
     
  2. manosaurus macrumors 6502

    manosaurus

    Joined:
    Aug 22, 2006
    #2
    The chess program is a very processor intensive one. That is just how it is. I remember calling Apple once for a problem with a computer I had and the rep. wanted me to run a few slected applications to max out the cpu. The rep. had me run the iTunes visualiser and chess at the same time to max the computer out. The higher difficulty setting the higher the cpu usage too.

    What is the "problem" exactly though? Surely you are not playing chess and also editing video at the same time so what does it matter that chess hogs so much of the cpu?
     
  3. virtual thread starter macrumors member

    Joined:
    Sep 30, 2006
    Location:
    Brazil
    #3
    The problem is that the temperature goes to 70+ degrees celsius, and the fans come on to 5,000+ RPM.

    And I run no other software which could be described as CPU intensive. Probably Colloquy is the next intensive app ;)
     
  4. iMeowbot macrumors G3

    iMeowbot

    Joined:
    Aug 30, 2003
    #4
    Sjeng is the underlying engine for the chess app.
     
  5. virtual thread starter macrumors member

    Joined:
    Sep 30, 2006
    Location:
    Brazil
    #5
    Yea, I know, a simple Google search found that out. But is it normal for the CPU to go to 100%, temperature to rise to 70+ celsius, and fans spinning 5,000+ RPM?
     
  6. Arne macrumors regular

    Joined:
    May 14, 2006
    Location:
    Germany
    #6
    Yes it is absolutely normal. Chess is a very difficult game for a computer. It has to calculate a lot so it will use the CPU very intense.
     
  7. iMeowbot macrumors G3

    iMeowbot

    Joined:
    Aug 30, 2003
    #7
    And a simple reading of the linked material would have answered your question.
    Of course! It's not simply trying to make legal moves, it's trying to beat you. As explained over there, the Sjeng engine was written for competition, it's not just a toy. The program doesn't merely "guess", future moves (both its own and the opponent's) need to be evaluated too. In effect, each move is preceded by playing out a bunch of hypothetical games and weighing the odds (past evaluations can be stored, but there are limits to that).
     
  8. Scarlet Fever macrumors 68040

    Scarlet Fever

    Joined:
    Jul 22, 2005
    Location:
    Bookshop!
    #8
    on a MacBook, 100% of the CPU is only using half its resources ;)
     

    Attached Files:

Share This Page