r1bqkb2/pp1pp3/n6r/2p2ppP/1PPP4/1n2P3/P3NP1P/RNB1KB1R b KQq - 2 13
FEN state: r1bqkb2/pp1pp3/n6r/2p2ppP/1PPP4/1n2P3/P3NP1P/RNB1KB1R b KQq - 2 13 ; Best move: b3a1
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, black pawn at d7 and black pawn at e7. Black knight at a6 and black rook at h6. Black pawn at c5, black pawn at f5, black pawn at g5 and white pawn at h5. White pawn at b4, white pawn at c4 and white pawn at d4. Black knight at b3 and white pawn at e3. White pawn at a2, white knight at e2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. White kingside, white queenside and black queenside castles are available. Half move number is 2. Full move number is 13. Black to move.