2b1k2r/r1pp1p1p/n4q1b/pp1Q4/1PPPppP1/P4N2/R3PK1P/1NB2n1R b k - 0 18
FEN state: 2b1k2r/r1pp1p1p/n4q1b/pp1Q4/1PPPppP1/P4N2/R3PK1P/1NB2n1R b k - 0 18 ; Best move: e4f3
The current state of the chess board is: Black bishop at c8, black king at e8 and black rook at h8. Black rook at a7, black pawn at c7, black pawn at d7, black pawn at f7 and black pawn at h7. Black knight at a6, black queen at f6 and black bishop at h6. Black pawn at a5, black pawn at b5 and white queen at d5. White pawn at b4, white pawn at c4, white pawn at d4, black pawn at e4, black pawn at f4 and white pawn at g4. White pawn at a3 and white knight at f3. White rook at a2, white pawn at e2, white king at f2 and white pawn at h2. White knight at b1, white bishop at c1, black knight at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.