Chess960

One move, two threats: a fork attacks two pieces at once, and only one can be saved.

The reverse of a pin: the valuable piece is hit first and the one behind it falls.

A piece steps aside and uncovers an attack from the piece it was blocking.

Mate on the last rank: the king's own pawns leave it nowhere to run.

Think you know chess? Eight questions, from easy to unfair. Your score becomes a rating, and we'll tell you how many people you're ahead of.

A fresh tactic each morning, rated against the community.