r1q2bnr/pp2kp1p/2n1b3/2pppp2/2P3P1/P1Q4P/1P1PPR2/RNB1KBN1 w Q - 0 13
FEN state: r1q2bnr/pp2kp1p/2n1b3/2pppp2/2P3P1/P1Q4P/1P1PPR2/RNB1KBN1 w Q - 0 13 ; Best move: c4d5
The current state of the chess board is: Black rook at a8, black queen at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black king at e7, black pawn at f7 and black pawn at h7. Black knight at c6 and black bishop at e6. Black pawn at c5, black pawn at d5, black pawn at e5 and black pawn at f5. White pawn at c4 and white pawn at g4. White pawn at a3, white queen at c3 and white pawn at h3. White pawn at b2, white pawn at d2, white pawn at e2 and white rook at f2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.