rnb1k1nr/1p2p1bp/p4p2/1qpp4/1PP2N1p/3PPP2/P5PP/RNBK2R1 w kq - 0 13
FEN state: rnb1k1nr/1p2p1bp/p4p2/1qpp4/1PP2N1p/3PPP2/P5PP/RNBK2R1 w kq - 0 13 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at e7, black bishop at g7 and black pawn at h7. Black pawn at a6 and black pawn at f6. Black queen at b5, black pawn at c5 and black pawn at d5. White pawn at b4, white pawn at c4, white knight at f4 and black pawn at h4. White pawn at d3, white pawn at e3 and white pawn at f3. White pawn at a2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at d1 and white rook at g1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 13. White to move.