r2qkb2/ppp1pp1r/n2p4/3n2pp/2N4P/1PQP1PPb/P1PKP1B1/R1B3N1 w q - 0 13
FEN state: r2qkb2/ppp1pp1r/n2p4/3n2pp/2N4P/1PQP1PPb/P1PKP1B1/R1B3N1 w q - 0 13 ; Best move: c3a5
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at e7, black pawn at f7 and black rook at h7. Black knight at a6 and black pawn at d6. Black knight at d5, black pawn at g5 and black pawn at h5. White knight at c4 and white pawn at h4. White pawn at b3, white queen at c3, white pawn at d3, white pawn at f3, white pawn at g3 and black bishop at h3. White pawn at a2, white pawn at c2, white king at d2, white pawn at e2 and white bishop at g2. White rook at a1, white bishop at c1 and white knight at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.