I’ve been patting myself on the back for making my life easier by choosing chess data as a domain to write programs against. Chess produces tons of well-structured, predictable, meaningful …

Concentric Squares (forks and skewers):

• Place black king on d5 and black rook on d4, then sequentially place white queen on every square where it forks or skewers the rook and king
• Move rook in …

Philidor’s position for queen vs rook.

Yesterday a friend was demonstrating how to mess with your opponent, so after 1.e4 e5 2.Nf3 he played 2...d5.

I’ve definitely seen the position before and probably even figured out the correct …