1nb1k2r/rpppb1n1/4pq2/p5pp/QPPP1Pp1/N1B5/P3P1BP/R3K1NR w K - 2 18
FEN state: 1nb1k2r/rpppb1n1/4pq2/p5pp/QPPP1Pp1/N1B5/P3P1BP/R3K1NR w K - 2 18 ; Best move: a3b5
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8 and black rook at h8. Black rook at a7, black pawn at b7, black pawn at c7, black pawn at d7, black bishop at e7 and black knight at g7. Black pawn at e6 and black queen at f6. Black pawn at a5, black pawn at g5 and black pawn at h5. White queen at a4, white pawn at b4, white pawn at c4, white pawn at d4, white pawn at f4 and black pawn at g4. White knight at a3 and white bishop at c3. White pawn at a2, white pawn at e2, white bishop at g2 and white pawn at h2. White rook at a1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 18. White to move.