rnb1kbr1/pp6/3npp1p/2p5/q5p1/3P1N1P/RPP1BQ2/2B3KR w q - 0 22
FEN state: rnb1kbr1/pp6/3npp1p/2p5/q5p1/3P1N1P/RPP1BQ2/2B3KR w q - 0 22 ; Best move: a2a4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7 and black pawn at b7. Black knight at d6, black pawn at e6, black pawn at f6 and black pawn at h6. Black pawn at c5. Black queen at a4 and black pawn at g4. White pawn at d3, white knight at f3 and white pawn at h3. White rook at a2, white pawn at b2, white pawn at c2, white bishop at e2 and white queen at f2. White bishop at c1, white king at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 22. White to move.