"The Strange Tale of how <Vasily Smyslov> got Fifteen Extra Minutes on his Clock without Realizing it"

Botvinnik:

<"...on one occasion in our match the arbiter Opocensky had to intervene; this occurred during the 18th game. Soon after the opening Smyslov's clock stopped, which was noticed by the demonstrator only some fifteen minutes later! More precisely, the clock did not stop- it continued going, and only the minute hand stopped, and so neither I nor my opponent noticed this, since the clock continued ticking...

During play a second, electric chess clock was in use, enabling the spectators to observe the situation on our clocks. This electric clock was operated by the demonstrator, and it was he (with a delay of fifteen minutes) who drew the arbiter's attention to the fault in Smyslov's clock.

Of course, Opecensky ordered that the faulty clock should be replaced. <<<In so doing, however, he set my opponent's clock to the same time as had been shown by the faulty clock! To my bewildered question, the arbiter replied that there was no mention in the match regulations about supervisory electric clocks, and therefore he couldn't put Smyslov's clock forward, although, essentially, it was clear how long the clock had stood still.>>> I immediately accepted the arbiter's decision, although I considered it incorrect.

I decided not to approach Smyslov directly; he was so engrossed in the position that he did not notice either our discussions, which took place at the other end of the stage, or the change of clocks itself, otherwise he would undoubtedly have asked that his clock be put forward...">

Botvinnik after 28..Ke7:
"It is only this quite unnecessary evacuation of the king, first to e7and then to d8, that gives White real winning chances. If Black put his rooks on h4 and h8, his bishop on e7 and his king on g7, then White would have to settle for a draw."

Averbakh recommended 33 d6+..cxd 34 Bg4..Qc7 35 Rgd1..Rd8 36 Rxh3 with a dangerous initiative for White.

White's definitely better after 34. ... Qc7?, which gives back the pawn without clipping the initiative. But black is okay after 34. ... Rxg4! At depth 40, stockfish evaluates the position after the exchange sacrifice as +0.8.

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White to move after 34. ... Rxg4

Black's forever passive, but it's also really unclear how white can break through his position.

35. Qxg4 leads to a dead position: 35. ... Qxg5 36. Rxg5 Ke6 37. Rg1 Bf8 38. Rgd1 Be7 and white can never win the h-pawn without losing g5, in which case he still can't make any progress, e.g., 39. Rf3 Bxg5 40. Rdd3 Bh4 41. Rxh3 g5 and black should draw without much difficulty.

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If, instead, 35. Rxg4, white faces the same problems, just with queens on: There's no pawn breaks, winning h3 involves losing g5, and black's weak point on d6 is defended splendidly by his "bad" bishop. I don't see a way to resolve those issues.