1rbn1kr1/1p1p1p1p/4pbpP/p6P/PPpP4/4PP2/N1q2R2/R1BQKBN1 w Q - 1 21
FEN state: 1rbn1kr1/1p1p1p1p/4pbpP/p6P/PPpP4/4PP2/N1q2R2/R1BQKBN1 w Q - 1 21 ; Best move: d1c2
The current state of the chess board is: Black rook at b8, black bishop at c8, black knight at d8, black king at f8 and black rook at g8. Black pawn at b7, black pawn at d7, black pawn at f7 and black pawn at h7. Black pawn at e6, black bishop at f6, black pawn at g6 and white pawn at h6. Black pawn at a5 and white pawn at h5. White pawn at a4, white pawn at b4, black pawn at c4 and white pawn at d4. White pawn at e3 and white pawn at f3. White knight at a2, black queen at c2 and white rook at f2. White rook at a1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 21. White to move.