Add more features to UCI.py

[jlrdh]

Hello, I encountered this issue with Sunfish:

• Start position r2qkbnr/p1pnP1p1/8/5p1p/3P2b1/2p2N2/PPPB1PPP/R2QKB1R w KQkq - 0 1 with Sunfish set to play Black

When White plays e7d8q in cutechess, Sunfish does not play at all.

• With the same FEN and Sunfish is set to play white, Sunfish plays exd8=Q+ , but then when the cutechess uci command sends

  position fen r2qkbnr/p1pnP1p1/8/5p1p/3P2b1/2p2N2/PPPB1PPP/R2QKB1R w KQkq - 0 1 moves e7d8q e8d8

Sunfish disconnects.

Hope that reporting this issue will help improve the Sunfish engine

[thomasahle]

Thank you. As it is now, Sunfish doesn't really support UCI. There is only some very preliminary code submitted by @ryanhs back in 2017. One feature it doesn't support is mixing position fen and moves. On the other hand, mixing position startpos and moves is actually supported, so it shouldn't be too hard to add this feature.

[thomasahle]

The latest version now supports the whole uci standard.