1n3kqr/1p2np1p/rpN5/3pP1bR/4Q1b1/BP2P3/P1P2PP1/R3KB2 w Q - 1 21
FEN state: 1n3kqr/1p2np1p/rpN5/3pP1bR/4Q1b1/BP2P3/P1P2PP1/R3KB2 w Q - 1 21 ; Best move: e4g4
The current state of the chess board is: Black knight at b8, black king at f8, black queen at g8 and black rook at h8. Black pawn at b7, black knight at e7, black pawn at f7 and black pawn at h7. Black rook at a6, black pawn at b6 and white knight at c6. Black pawn at d5, white pawn at e5, black bishop at g5 and white rook at h5. White queen at e4 and black bishop at g4. White bishop at a3, white pawn at b3 and white pawn at e3. White pawn at a2, white pawn at c2, white pawn at f2 and white pawn at g2. White rook at a1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 1. Full move number is 21. White to move.