1rb1kb1r/ppq4p/1np1pn2/1B3pP1/PP1P4/4PQ1R/3P1PP1/RNB2KN1 w k - 3 13
FEN state: 1rb1kb1r/ppq4p/1np1pn2/1B3pP1/PP1P4/4PQ1R/3P1PP1/RNB2KN1 w k - 3 13 ; Best move: g5f6
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black queen at c7 and black pawn at h7. Black knight at b6, black pawn at c6, black pawn at e6 and black knight at f6. White bishop at b5, black pawn at f5 and white pawn at g5. White pawn at a4, white pawn at b4 and white pawn at d4. White pawn at e3, white queen at f3 and white rook at h3. White pawn at d2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white king at f1 and white knight at g1. Black kingside is the only castle move available. Half move number is 3. Full move number is 13. White to move.