Yes, infilling does matter under any rule set, because it’s a form of stalling prohibited by the site rules. Doing that rudely wastes time and delays the opponent from moving on to another game. Although most players do it because they don’t know better, others are pathetic losers who deliberately stall because they know some players will abandon the game or even resign rather than waste the time. Not only is that scenario dishonest, but the wrong result damages the integrity of the ranking system.
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