r2qkbr1/pbp1p1p1/2np1p1n/1pP2Q1p/1P1PPP1P/P5P1/8/RNBK1BNR w q - 1 15
FEN state: r2qkbr1/pbp1p1p1/2np1p1n/1pP2Q1p/1P1PPP1P/P5P1/8/RNBK1BNR w q - 1 15 ; Best move: f5g6
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7, black bishop at b7, black pawn at c7, black pawn at e7 and black pawn at g7. Black knight at c6, black pawn at d6, black pawn at f6 and black knight at h6. Black pawn at b5, white pawn at c5, white queen at f5 and black pawn at h5. White pawn at b4, white pawn at d4, white pawn at e4, white pawn at f4 and white pawn at h4. White pawn at a3 and white pawn at g3. White rook at a1, white knight at b1, white bishop at c1, white king at d1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 15. White to move.