Alan OBrien wrote:
Botvinnik and the rest of the younger generation were not liked in the 1933
USSR Championships. In the game Botvinnik v Dus Chotimorsky, the latter
played on in a known-drawn rook ending where he was a pawn up. Apparently
they even played on with just K & R each until the TD stepped in. Dus
Chotimorsky said he was going to play on until 150 moves had been reached.
The score of the game is now lost; or does anyone here have it. I don't
suppose it is very interesting anyway.

Can't help you on the score, but "The Soviet Championships" by
Cafferty and Taimanov confirms your account of the game, adding that it
was stopped after 102 moves. The tournament book was "a very thin
effort, giving only 46 games," and I imagine they left out the long
meaningless draw to save space. BTW, Duz-Khotimirsky finished 19th of
20 (+2 -10 =7), Botvinnik clear first (+11 -2 =6).
In compensation for the long game, Botvinnik did win this miniatu
Botvinnik-Sorokin, 8th USSR Ch, Leningrad 1933: 1.d4 Nf6 2.c4 e6
3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Bg5 Qd6 7.e3 Ne4 8.Bf4 Qg6 9.Qb3 c5
10.f3 Nxc3 11.bxc3 Ba5 12.Bxb8 1-0. After 12...Rxb8 13.Qb5+ wins the
Ba5.