rnb1kbn1/pp2pp1r/3p2p1/1qp4p/4N3/N1PP2B1/P2KPPPP/RQ3B1R b q - 1 13
FEN state: rnb1kbn1/pp2pp1r/3p2p1/1qp4p/4N3/N1PP2B1/P2KPPPP/RQ3B1R b q - 1 13 ; Best move: b5b1
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 bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at e7, black pawn at f7 and black rook at h7. Black pawn at d6 and black pawn at g6. Black queen at b5, black pawn at c5 and black pawn at h5. White knight at e4. White knight at a3, white pawn at c3, white pawn at d3 and white bishop at g3. White pawn at a2, white king at d2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white queen at b1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 13. Black to move.