rnb1kr2/1pb4p/2p1p1p1/p2p3P/2n1NP2/q1PP1QP1/P2B1K2/R4BNR b q - 1 23
FEN state: rnb1kr2/1pb4p/2p1p1p1/p2p3P/2n1NP2/q1PP1QP1/P2B1K2/R4BNR b q - 1 23 ; Best move: d5e4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black rook at f8. Black pawn at b7, black bishop at c7 and black pawn at h7. Black pawn at c6, black pawn at e6 and black pawn at g6. Black pawn at a5, black pawn at d5 and white pawn at h5. Black knight at c4, white knight at e4 and white pawn at f4. Black queen at a3, white pawn at c3, white pawn at d3, white queen at f3 and white pawn at g3. White pawn at a2, white bishop at d2 and white king at f2. White rook at a1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 23. Black to move.