r1bqkb2/pp2r3/n3Pn1p/2pp2p1/PB3P2/1PP2B2/3PP2P/RN1QK1NR b KQq - 0 13
FEN state: r1bqkb2/pp2r3/n3Pn1p/2pp2p1/PB3P2/1PP2B2/3PP2P/RN1QK1NR b KQq - 0 13 ; Best move: c5b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at b7 and black rook at e7. Black knight at a6, white pawn at e6, black knight at f6 and black pawn at h6. Black pawn at c5, black pawn at d5 and black pawn at g5. White pawn at a4, white bishop at b4 and white pawn at f4. White pawn at b3, white pawn at c3 and white bishop at f3. White pawn at d2, white pawn at e2 and white pawn at h2. White rook at a1, white knight at b1, white queen at d1, white king at e1, white knight at g1 and white rook at h1. White kingside, white queenside and black queenside castles are available. Half move number is 0. Full move number is 13. Black to move.