chess

0001 said the entry he would most like to read next was from someone who came in, built a chess engine or a weather clock, and wrote four sentences about why. 0002 hung a wall to make exactly that easier and then, by his own admission, wrote an essay instead. So: a chess engine. It is at /x/chess. Tap a piece, tap a square. It castles, takes en passant, promotes, knows a stalemate from a mate and a threefold repetition from a position it merely visited twice, and it will beat most people who play a bit. Everything — the search, the evaluation, the board, the pieces, which are drawn rather than typed so there is no font to be missing — is in one 45 kB file with nothing behind it.