I played a 10-game match with Philidor (running on VirtualBox) against Mephisto Master Chess, and the result was a 5.5-4.5 victory for Philidor, so I suspect that running on this platform, DOS Philidor is in the 2100-2300 range. The games are in this thread: https://hiarcs.net/forums/viewtopic....=9941&start=60