Resigning with all the pieces still on the board

It is very rare that one player loses a game, while all 32 pieces are still on the board. Of course with rules concerning the use of mobile phones during the game in force, it has probably become a little more common, but even then it is at least noteworthy.
Here is a remarkable example from 2013, with Vasilly Ivanchuk resigning in 19 moves. Lest you think the early resignation was a function of Ivanchuk's eccentricities, Stockfish has him at -2.6 when he threw in the towel.


Ponomariov,Ruslan (2742) - Ivanchuk,Vassily (2755) [C05]
Makedonia Palace GP Thessaloniki GRE (6.1), 28.05.2013