Connect two Go (game) engines via Go Text Protocol (GTP).

Building

• go get github.com/rooklift/sgf
• go build twogtp.go

Features

• Plays multiple games with alternating colours
• Optional forced opening via SGF file
• Crash detection
• Legality checks
• Match resumption
• Timeouts
• Automatic SGF saving

Notes

• SGF files are saved in the same directory as the config file (which you pass to twogtp as its only command line argument).
• Control whether the engines are restarted between games with the restart option. We try to send the GTP command clear_cache to all engines anyway, but this was added to Leela Zero only after 0.17. Without it LZ may reuse its cached data, which can only be prevented by restarting.
• The passing_wins option is a cheap hack to allow LZ test matches to end early; the first engine to pass is considered the winner (this is usually correct).
• Otherwise, we currently do not try to calculate the score if the game ends due to 2 passes.
• Ongoing match results are saved directly into the config file, allowing match resumption.