How many games did you have to throw away because stockfish wanted to castle? Or did you force stockfish to not castle? Castling seems like such a frequent move it is hard to draw any conclusions about the strength of an engine that does not support it.
Show HN: Sameshi – a ~1200 Elo chess engine that fits within 2KB
31–40 of 78 posts
Re: Show HN: Sameshi – a ~1200 Elo chess engine that fits within 2KB
#32If you ever spent much time at a chess club, you've seen why 2kB is a really disturbing number.
Re: Show HN: Sameshi – a ~1200 Elo chess engine that fits within 2KB
#33This is very cool and having stalemate is nice, however how much space would it take to implement the full ruleset?
As you write: not implemented: castling, en passant, promotion, repetition, 50-move rule - those are all required to call the game being played modern chess.
I could see an argument for skipping repetition and 50-move rule for tiny engines, but you do need castling, en pessant and promotion for pretty much any serious play.
https://en.wikipedia.org/wiki/Video_Chess fit in 4k and supported fuller ruleset in 1980 did it not?
So I would ask what is the smallest fully UCI (https://www.chessprogramming.org/UCI) compliant engine available currently?
This would be a fun goal to beat - make something tiny that supports full ruleset.
PS my first chess computer in early 1980s was this: https://www.ismenio.com/chess_fidelity_cc3.html - it also supported castling, en pessant, not sure about 50 move rule.
Re: Show HN: Sameshi – a ~1200 Elo chess engine that fits within 2KB
#34If you ever spent much time at a chess club, you've seen why 2kB is a really disturbing number.
I have not. Can you please tell me why?
Re: Show HN: Sameshi – a ~1200 Elo chess engine that fits within 2KB
#35How many games did you have to throw away because stockfish wanted to castle? Or did you force stockfish to not castle? Castling seems like such a frequent move it is hard to draw any conclusions about the strength of an engine that does not support it.
zero games were thrown away for castling, because i forced stockfish not to castle (and not to play en passant/promotion) by filtering legal moves and only giving those filtered moves via root_moves
so every game stayed in the same no castling variant
and you're right, this rating is for that constrained variant, not full chess.
Re: Show HN: Sameshi – a ~1200 Elo chess engine that fits within 2KB
#36If anyone is curious, the most common tool I've seen for ELO estimation among engine developers is cutechess [1], which uses SPRT [2]. Or ordo [3], haven't used this myself though
[2] https://www.chessprogramming.org/Sequential_Probability_Rati...
Re: Show HN: Sameshi – a ~1200 Elo chess engine that fits within 2KB
#37[dead]
Re: Show HN: Sameshi – a ~1200 Elo chess engine that fits within 2KB
#38How did you handle games where Stockfish would castle or promote?
i forced stockfish to play only non castling, non en passant, non promotion moves by filtering legal moves and passing only those as root_moves also removed castling/EP rights from FEN
I'd call that cheating but the size and capability is impressive nonetheless.