rn1k3r/Bbp1b3/p4qpp/1P1ppNP1/5p2/3P1P1P/P1P1P3/1R1QKBNR w K - 2 21
FEN state: rn1k3r/Bbp1b3/p4qpp/1P1ppNP1/5p2/3P1P1P/P1P1P3/1R1QKBNR w K - 2 21 ; Best move: g5f6
The current state of the chess board is: Black rook at a8, black knight at b8, black king at d8 and black rook at h8. White bishop at a7, black bishop at b7, black pawn at c7 and black bishop at e7. Black pawn at a6, black queen at f6, black pawn at g6 and black pawn at h6. White pawn at b5, black pawn at d5, black pawn at e5, white knight at f5 and white pawn at g5. Black pawn at f4. White pawn at d3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at c2 and white pawn at e2. White rook at b1, white queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 21. White to move.