What is your conclusion?
Under FIDE rules:
Assuming white released the rook before his flag fell, article 6.9 decides the outcome:
"Except where one of Articles 5.1.1, 5.1.2, 5.2.1, 5.2.2, 5.2.3 applies, if a player does not complete the prescribed number of moves in the allotted time, the game is lost by thatplayer. However, the game is drawn if the position is such that the opponent cannot checkmate the player’s king by any possible series of legal moves."
Draw is correct outcome.
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My friend is an arbiter. Based on the picture, he told me that the result was draw.
The detail of the game:
White move Rf8+ in the same time run out of time. this is a time control game. The game ended with a draw
The reason game was draw is if the game continues, followed by a series of forced moves Rf8+ Qxfg+ Qxf8+ Kxf8 stalemate. black still cant win.
I think there's no point playing chess using clock if black draw or cant win. but i accept my friend's judgement.