1nb1kqnr/r5b1/p1p2pp1/Pp1pp3/3P2Pp/N1P1PP2/1P2NK1P/R1B1QBR1 b k - 0 18
FEN state: 1nb1kqnr/r5b1/p1p2pp1/Pp1pp3/3P2Pp/N1P1PP2/1P2NK1P/R1B1QBR1 b k - 0 18 ; Best move: e5e4
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8, black queen at f8, black knight at g8 and black rook at h8. Black rook at a7 and black bishop at g7. Black pawn at a6, black pawn at c6, black pawn at f6 and black pawn at g6. White pawn at a5, black pawn at b5, black pawn at d5 and black pawn at e5. White pawn at d4, white pawn at g4 and black pawn at h4. White knight at a3, white pawn at c3, white pawn at e3 and white pawn at f3. White pawn at b2, white knight at e2, white king at f2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at e1, white bishop at f1 and white rook at g1. Black kingside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.