2bqkbr1/5n1p/1ppp2p1/rP2ppN1/4PPP1/1P1PB3/7P/R3KBNR w KQ - 0 21
FEN state: 2bqkbr1/5n1p/1ppp2p1/rP2ppN1/4PPP1/1P1PB3/7P/R3KBNR w KQ - 0 21 ; Best move: a1a5
The current state of the chess board is: Black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black knight at f7 and black pawn at h7. Black pawn at b6, black pawn at c6, black pawn at d6 and black pawn at g6. Black rook at a5, white pawn at b5, black pawn at e5, black pawn at f5 and white knight at g5. White pawn at e4, white pawn at f4 and white pawn at g4. White pawn at b3, white pawn at d3 and white bishop at e3. White pawn at h2. White rook at a1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 0. Full move number is 21. White to move.