1nb1kb1r/1p2pp1p/r2p2Bn/pN1N2pP/P1pq4/1R6/1PPP1PP1/2BQK1R1 w k - 10 18
FEN state: 1nb1kb1r/1p2pp1p/r2p2Bn/pN1N2pP/P1pq4/1R6/1PPP1PP1/2BQK1R1 w k - 10 18 ; Best move: b5d4
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at e7, black pawn at f7 and black pawn at h7. Black rook at a6, black pawn at d6, white bishop at g6 and black knight at h6. Black pawn at a5, white knight at b5, white knight at d5, black pawn at g5 and white pawn at h5. White pawn at a4, black pawn at c4 and black queen at d4. White rook at b3. White pawn at b2, white pawn at c2, white pawn at d2, white pawn at f2 and white pawn at g2. White bishop at c1, white queen at d1, white king at e1 and white rook at g1. Black kingside is the only castle move available. Half move number is 10. Full move number is 18. White to move.