the engines were showing as their first recommendation a line where White forces a draw after 42...Ke6 (instead of Kd6, as played by Kramnik) by 43.Qg6+ Ke7 44.Qg7+ etc., but Mcshane wasn't obliged to take the perpetual check - he could have captured the f5 pawn and played on.>

But still, a line such as 42...Ke6 43.Qg6+ Ke7 44.Qxf5 would in all likelihood be significantly better for Black than the game:

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"regarding Kramnik's behavior today...his walking-away-bluff and skipping post game conference both seemed childish but what's worse was that he made tons of noises with his drinking glass when it's McShane's turn...he even slowly poured water out of the water bottle into the his glass right at the table when MCshane was <severely> low on time. Not cool."

thus the pun for the game could be: SIP BY SIP

McShane exaplined that in the press conference after the game. He said that he was worried about 70...Qc1:

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with the threat of check on h6. He immediately added that he's quite certain a computer will find a win here (and there is), but "it's very difficult to play this way with your king floating in mid-air".

Btw, that was apparently also related to why, a few moves later, he played <70.Kh3> instead of Kh2 - he still didn't want to enter the sequence 70.Kh2 Qxf2+ 71.Kh3 Qf1+ 72.Kh4 Qh1+, forgetting (or missing) that now, with the new constellation of queens on the board, the king can escape to g5.

Endgames sometimes disappoint strong players because they count a lot on the numbers of pawns, which the stronger player may have previously sac-ed.

In this case, both sides should know their endgame technique.