Reckon it's possible to get 100 accuracy in a random game on chess.com?

NOT BY INTENTIONAL AGREEMENT

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Leave your thoughts

It is possible. I've done it before. Just play all book moves and the opponent resigns, losses on time, or gets disconnected etc. and the game report considers it 100 accuracy.

The other likely way is the opponent playing a blunder early into the game. Imagine they hang their Queen in the opening. Now just about ANY move you play is still winning (provided you don't hang back your Queen or hang checkmate). This makes it easier to find best/good moves and that inflates the game accuracy. It is MUCH more difficult to find good (and especially "best") moves when the opponent keeps playing well.

Play the Berlin and get the draw in the Berlin endgame.

Or just your opponent blunders quickly like e4 f5 exf5 g5 Qh5...

e4 e5 Qh5 Ke7 Qxe5 lol

iTs pRettY rAre buT it hAppenS moRe than u thiNk

Yeah just got one right here 
Nivek_Rewlup416 vs. timsoniman | Analysis - Chess.com