Is it possible to tolerate Chess 960 format castling moves in UCI?

[rooklift]

I've not built Ceres but I hear reports that castling causes problems for Nibbler.

Nibbler currently always runs in Chess 960 mode and so (for normal chess) sends castling moves as one of:

• e1h1
• e1a1
• e8h8
• e8a8

Would it be possible / easy to accept these as valid castling moves? Basically, check if the relevant king is present on the source square, then treat it as if e1g1 or whatever had come...

[dje-dev]

Test UCI commands now seem supported.

position fen r3k2r/8/8/8/8/8/8/R3K2R w KQkq - 4 1 moves e1h1
position fen r3k2r/8/8/8/8/8/8/R3K2R w KQkq - 4 1 moves e1a1
position fen r3k2r/8/8/8/8/8/8/R3K2R b KQkq - 4 1 moves e8h8
position fen r3k2r/8/8/8/8/8/8/R3K2R b KQkq - 4 1 moves e8a8