r1q1kbr1/p1p2pp1/npbpp3/6Pp/2P1n3/1P2P2P/P2B1P2/RN1QKBNR w q - 2 15
FEN state: r1q1kbr1/p1p2pp1/npbpp3/6Pp/2P1n3/1P2P2P/P2B1P2/RN1QKBNR w q - 2 15 ; Best move: g5g6
The current state of the chess board is: Black rook at a8, black queen at c8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at c7, black pawn at f7 and black pawn at g7. Black knight at a6, black pawn at b6, black bishop at c6, black pawn at d6 and black pawn at e6. White pawn at g5 and black pawn at h5. White pawn at c4 and black knight at e4. White pawn at b3, white pawn at e3 and white pawn at h3. White pawn at a2, white bishop at d2 and white pawn at f2. White rook at a1, white knight at b1, white queen at d1, white king at e1, 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 2. Full move number is 15. White to move.