[vc9999]

Speed runs are 3min game, or even less.

It's much hard to cheat in 3minutes games. The chess engine takes somes time to think about the next move

[sobellian]

Chess engines destroy humans at speed chess. The time use creeps in if you're using a low-tech method of cheating (i.e. manually punching moves into your engine and the website).

[juanefren]

AFAIK cheaters still manually input moves into engine, so cheating on 3min blitz against a super GM won't so be easy.