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GNU Go Documentation

3.9.2 Other general options:

• `-M', `--cache-size megs'

  Memory in megabytes used for caching of read results. The default size is 8 unless you configure gnugo with the command configure --enable-cache-size=size before compiling to make size the default (see section 2. Installation). GNU Go stores results of its reading calculations in a Hash table (see section 14.2 Hashing of Positions). If the Hash table is filled, it is emptied and the reading continues, but some reading may have to be repeated that was done earlier, so a larger cache size will make GNU Go run faster, provided the cache is not so large that swapping occurs. Swapping may be detected on GNU/Linux machines using the program top. However, if you have ample memory or if performance seems to be a problem you may want to increase the size of the cache using this option.

• `--chinese-rules'

  Use Chinese rules. This means that the Chinese or Area Counting is followed. It may affect the score of the game by one point in even games, more if there is a handicap (since in Chinese Counting the handicap stones count for Black).

• `--japanese-rules'

  Use Japanese Rules. This is the default unless you specify `--enable-chinese-rules' as a configure option.

• `--copyright': Display the copyright notice
• `--version' or `-v': Print the version number
• `--printsgf filename':

  Create an SGF file containing a diagram of the board. Useful with `-L' to create diagrams from games.

• `--options'

  Print which experimental configure options were compiled into the program (see section 2.2.4 Experimental Options).