r1b1kbn1/ppqp1pp1/n3p3/6Pr/P1p4p/2P1PP2/RP1P1K1P/1NBQ1BNR w q - 1 10
FEN state: r1b1kbn1/ppqp1pp1/n3p3/6Pr/P1p4p/2P1PP2/RP1P1K1P/1NBQ1BNR w q - 1 10 ; Best move: f3f4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black queen at c7, black pawn at d7, black pawn at f7 and black pawn at g7. Black knight at a6 and black pawn at e6. White pawn at g5 and black rook at h5. White pawn at a4, black pawn at c4 and black pawn at h4. White pawn at c3, white pawn at e3 and white pawn at f3. White rook at a2, white pawn at b2, white pawn at d2, white king at f2 and white pawn at h2. White knight at b1, white bishop at c1, white queen 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 10. White to move.