1n2kb1r/1qp1pp2/r3b3/ppPp2pp/1P2n3/4PP2/PB1P1N1P/RN1Q1RKB b k - 0 18
FEN state: 1n2kb1r/1qp1pp2/r3b3/ppPp2pp/1P2n3/4PP2/PB1P1N1P/RN1Q1RKB b k - 0 18 ; Best move: e4f2
The current state of the chess board is: Black knight at b8, black king at e8, black bishop at f8 and black rook at h8. Black queen at b7, black pawn at c7, black pawn at e7 and black pawn at f7. Black rook at a6 and black bishop at e6. Black pawn at a5, black pawn at b5, white pawn at c5, black pawn at d5, black pawn at g5 and black pawn at h5. White pawn at b4 and black knight at e4. White pawn at e3 and white pawn at f3. White pawn at a2, white bishop at b2, white pawn at d2, white knight at f2 and white pawn at h2. White rook at a1, white knight at b1, white queen at d1, white rook at f1, white king at g1 and white bishop at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.