A Tale Of Three Draw Offers

THERE were three draw offers in my round-three game today from the Highlands Open in Trebic, Czech Rep.

Black has just played 21...Bc8-e6, pressed his clock and offered a draw in Spanton (1923) - Lubos Svizensky (1937)

Black had been under the cosh for much of the game, and his king still looks a little unsafe, but the draw offer surprised me as Black's pawn-structure is clearly better.
I really should have accepted the draw, but after a long think I played …
22.Qc3?!
… and the game continued ...
22...Rd8
We both thought White had been threatening to win with 23.d5, but even a purely defensive move such as 22...b6 was fine as 23.d5? loses a pawn to 23...Rd8, the point being that the d pawn is pinned because of Black's back-rank mating threat.
23.Ra5??
White is just about holding on after 23.Bc2, as 23...Bxa2?? loses to 24.Qa3+
23...Rxd4??
Black wins after 23...g6 as White's bishop is trapped.
24.Qxd4
Also drawing is 24.Ra8+ Rd8 25.Qb4+ Ke8 (but not 25...Qe7?? 26.Rxd8#) 26.Rxd8+ Qd8 27.Bc2
24...Qxa5 25.b4 Qc7 26.Bb1 Qd7

Black has just played 26...Qc7-d7, pressed his clock and offered a draw

I decided to play on, hoping to somehow generate an edge thanks to the possibility of creating an outside passed pawn.
27.Qxd7 Bxd7 28.f4 Ke7 29.Kf2 Kd6 30.Ke3 c5 31.a3
Fearing that Black, not White, was starting to stand better, I offered (correctly) a draw, and was relieved when LS accepted almost immediately.
In fact the position does seem to be dead-equal, as Black's king has no way of penetrating White's queenside.