1rk3nr/pb2p1b1/1p1q1p2/1P1p2p1/P2pP1P1/n1P2P1p/5KBP/1NB3NR w - - 0 21
FEN state: 1rk3nr/pb2p1b1/1p1q1p2/1P1p2p1/P2pP1P1/n1P2P1p/5KBP/1NB3NR w - - 0 21 ; Best move: e4e5
The current state of the chess board is: Black rook at b8, black king at c8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at e7 and black bishop at g7. Black pawn at b6, black queen at d6 and black pawn at f6. White pawn at b5, black pawn at d5 and black pawn at g5. White pawn at a4, black pawn at d4, white pawn at e4 and white pawn at g4. Black knight at a3, white pawn at c3, white pawn at f3 and black pawn at h3. White king at f2, white bishop at g2 and white pawn at h2. White knight at b1, white bishop at c1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.