Prime

Prime is a strategic board game inspired by chess and checkers.

Two opponents face off on a 64-square board. Pieces are marked with a number,
which changes when capturing or promoting. Pawns move one square forward;
even pieces move forward and sideways; odd pieces move forward and diagonally;
Prime pieces (5+) move in any direction like a queen.

Each player starts with 8 pawns, 4 even, 2 odd, and 2 Prime pieces. Capture
all opponent pieces to win, or have more Prime pieces if both sides have only
Primes left.