rn4nr/p1pp2bp/b1k1ppp1/qp2P3/P5P1/2P2P1N/1PQPB2P/RNBK3R b - - 4 13
FEN state: rn4nr/p1pp2bp/b1k1ppp1/qp2P3/P5P1/2P2P1N/1PQPB2P/RNBK3R b - - 4 13 ; Best move: b5a4
The current state of the chess board is: Black rook at a8, black knight at b8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7, black bishop at g7 and black pawn at h7. Black bishop at a6, black king at c6, black pawn at e6, black pawn at f6 and black pawn at g6. Black queen at a5, black pawn at b5 and white pawn at e5. White pawn at a4 and white pawn at g4. White pawn at c3, white pawn at f3 and white knight at h3. White pawn at b2, white queen at c2, white pawn at d2, white bishop at e2 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 h1. Both players have exhausted their castles. Half move number is 4. Full move number is 13. Black to move.