rnb1k1nr/q2p2p1/p1p4p/1p3p2/2B1p3/bP2PP1N/R1PPN1PP/2BQ1RK1 w kq - 4 13
FEN state: rnb1k1nr/q2p2p1/p1p4p/1p3p2/2B1p3/bP2PP1N/R1PPN1PP/2BQ1RK1 w kq - 4 13 ; Best move: c1a3
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 queen at a7, black pawn at d7 and black pawn at g7. Black pawn at a6, black pawn at c6 and black pawn at h6. Black pawn at b5 and black pawn at f5. White bishop at c4 and black pawn at e4. Black bishop at a3, white pawn at b3, white pawn at e3, white pawn at f3 and white knight at h3. White rook at a2, white pawn at c2, white pawn at d2, white knight at e2, white pawn at g2 and white pawn at h2. White bishop at c1, white queen at d1, white rook at f1 and white king at g1. Black kingside and black queenside castles are available. Half move number is 4. Full move number is 13. White to move.