r3qknr/pp3p2/2p1n1pb/P2pp3/2P1b1Pp/1R1B3P/1P1PQP2/1NB2K1R w - - 0 21
FEN state: r3qknr/pp3p2/2p1n1pb/P2pp3/2P1b1Pp/1R1B3P/1P1PQP2/1NB2K1R w - - 0 21 ; Best move: d3e4
The current state of the chess board is: Black rook at a8, black queen at e8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7 and black pawn at f7. Black pawn at c6, black knight at e6, black pawn at g6 and black bishop at h6. White pawn at a5, black pawn at d5 and black pawn at e5. White pawn at c4, black bishop at e4, white pawn at g4 and black pawn at h4. White rook at b3, white bishop at d3 and white pawn at h3. White pawn at b2, white pawn at d2, white queen at e2 and white pawn at f2. White knight at b1, white bishop at c1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.