FEN

The Forsyth–Edwards Notation describes a board position.

Examples:

• rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR
• 8/8/8/8/8/8/8/8 empty board

Given a FEN you can continue playing from that position. E.g given 8/5k2/8/5K1P/8/8/8/8

a game might continue as: