r3k2r/Qbp3bp/1n1pqpp1/1P6/1P1Pp3/2N1PPP1/RB5P/4KBNR w q - 1 21
FEN state: r3k2r/Qbp3bp/1n1pqpp1/1P6/1P1Pp3/2N1PPP1/RB5P/4KBNR w q - 1 21 ; Best move: a7b7
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. White queen at a7, black bishop at b7, black pawn at c7, black bishop at g7 and black pawn at h7. Black knight at b6, black pawn at d6, black queen at e6, black pawn at f6 and black pawn at g6. White pawn at b5. White pawn at b4, white pawn at d4 and black pawn at e4. White knight at c3, white pawn at e3, white pawn at f3 and white pawn at g3. White rook at a2, white bishop at b2 and white pawn at h2. White king at e1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 21. White to move.