1r1k1bn1/pbpq4/4ppp1/3p2Nr/P2PPPP1/1p3N1p/6BP/R1B1KR2 w Q - 0 21
FEN state: 1r1k1bn1/pbpq4/4ppp1/3p2Nr/P2PPPP1/1p3N1p/6BP/R1B1KR2 w Q - 0 21 ; Best move: e4e5
The current state of the chess board is: Black rook at b8, black king at d8, black bishop at f8 and black knight at g8. Black pawn at a7, black bishop at b7, black pawn at c7 and black queen at d7. Black pawn at e6, black pawn at f6 and black pawn at g6. Black pawn at d5, white knight at g5 and black rook at h5. White pawn at a4, white pawn at d4, white pawn at e4, white pawn at f4 and white pawn at g4. Black pawn at b3, white knight at f3 and black pawn at h3. White bishop at g2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1 and white rook at f1. White queenside is the only castle move available. Half move number is 0. Full move number is 21. White to move.