r1bqk3/nppnppbp/8/P2p2r1/4P1PP/P1NB4/2PPKP2/1RB1Q2R b q - 2 13
FEN state: r1bqk3/nppnppbp/8/P2p2r1/4P1PP/P1NB4/2PPKP2/1RB1Q2R b q - 2 13 ; Best move: d5e4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black king at e8. Black knight at a7, black pawn at b7, black pawn at c7, black knight at d7, black pawn at e7, black pawn at f7, black bishop at g7 and black pawn at h7. White pawn at a5, black pawn at d5 and black rook at g5. White pawn at e4, white pawn at g4 and white pawn at h4. White pawn at a3, white knight at c3 and white bishop at d3. White pawn at c2, white pawn at d2, white king at e2 and white pawn at f2. White rook at b1, white bishop at c1, white queen at e1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 13. Black to move.