rn3b1r/p2b2p1/1ppk1p2/3pp3/2qPP2B/5Pn1/PP1N3P/RQ2KB1R w KQ - 2 21
FEN state: rn3b1r/p2b2p1/1ppk1p2/3pp3/2qPP2B/5Pn1/PP1N3P/RQ2KB1R w KQ - 2 21 ; Best move: d2c4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at f8 and black rook at h8. Black pawn at a7, black bishop at d7 and black pawn at g7. Black pawn at b6, black pawn at c6, black king at d6 and black pawn at f6. Black pawn at d5 and black pawn at e5. Black queen at c4, white pawn at d4, white pawn at e4 and white bishop at h4. White pawn at f3 and black knight at g3. White pawn at a2, white pawn at b2, white knight at d2 and white pawn at h2. White rook at a1, white queen at b1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 2. Full move number is 21. White to move.