rnb1k2r/5p1p/1b2pP2/pp2q2p/NP1p2P1/P2P4/2P1P3/RNBQK2R w KQkq - 2 21
FEN state: rnb1k2r/5p1p/1b2pP2/pp2q2p/NP1p2P1/P2P4/2P1P3/RNBQK2R w KQkq - 2 21 ; Best move: a4b6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at f7 and black pawn at h7. Black bishop at b6, black pawn at e6 and white pawn at f6. Black pawn at a5, black pawn at b5, black queen at e5 and black pawn at h5. White knight at a4, white pawn at b4, black pawn at d4 and white pawn at g4. White pawn at a3 and white pawn at d3. White pawn at c2 and white pawn at e2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 2. Full move number is 21. White to move.