rn2k2B/Np1bp1b1/2p2ppp/1q5n/pP2pPP1/PB6/1QPP3P/R3K1NR w q - 4 22
FEN state: rn2k2B/Np1bp1b1/2p2ppp/1q5n/pP2pPP1/PB6/1QPP3P/R3K1NR w q - 4 22 ; Best move: a7b5
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and white bishop at h8. White knight at a7, black pawn at b7, black bishop at d7, black pawn at e7 and black bishop at g7. Black pawn at c6, black pawn at f6, black pawn at g6 and black pawn at h6. Black queen at b5 and black knight at h5. Black pawn at a4, white pawn at b4, black pawn at e4, white pawn at f4 and white pawn at g4. White pawn at a3 and white bishop at b3. White queen at b2, white pawn at c2, white pawn at d2 and white pawn at h2. White rook at a1, white king at e1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 22. White to move.