rnbqk1nr/6p1/pp6/b1pPppPp/P2N1B2/3P1P2/1R1QP1BP/4K1NR w K - 2 20
FEN state: rnbqk1nr/6p1/pp6/b1pPppPp/P2N1B2/3P1P2/1R1QP1BP/4K1NR w K - 2 20 ; Best move: f4e5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at e8, black knight at g8 and black rook at h8. Black pawn at g7. Black pawn at a6 and black pawn at b6. Black bishop at a5, black pawn at c5, white pawn at d5, black pawn at e5, black pawn at f5, white pawn at g5 and black pawn at h5. White pawn at a4, white knight at d4 and white bishop at f4. White pawn at d3 and white pawn at f3. White rook at b2, white queen at d2, white pawn at e2, white bishop at g2 and white pawn at h2. White king at e1, 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 20. White to move.