Antoine Kosciuko-Morizet: The Man, The Myth, Laffy77
Antoine Kosciuko-Morizet is the kind of name that makes you picture someone sniffing wine in a Lyon cellar. His username, Laffy77, is the kind of name that makes you picture a taffy enthusiast born in 1977. Somehow, both are true, and both log in to play bullet chess, because Antoine has discovered that a minute on the clock is plenty of time to ruin someone's evening.
The Great Ascent
He started hovering around 1300 bullet in early 2023, then in 2025 he looked at the calendar and decided months were merely suggestions. August 2025 alone featured roughly 650 bullet games, which works out to about 21 games a day, every day, and is either admirable dedication or a wellness concern. The result of all that clicking: a climb to a bullet peak of 2230 (2026-10-11), with the occasional mid-climb dip that he treats as a brief vacation.
The Closed Sicilian Armory
With the white pieces, Laffy77 has one true love: the Closed Sicilian, played nearly 300 times in bullet with a win rate comfortably north of 60%. The setup is patient, sneaky, and very rude once the pawns march. You can watch the typical storm front roll in here:
As Black, he happily takes on the Scandinavian Defense and actually enjoys facing the Nimzo-Larsen Attack, winning over half of those meetings. His nemesis is the Amar Gambit: 127 games against it as Black, a win rate under 38%, and presumably a strong personal opinion about 1.Nh3.
Style: Never Resign, Always Weaponize the Clock
- Drops a piece? His comeback rate sits above 82%, so if you grab that "free" knight, start apologizing to it in advance.
- His endgame frequency is nearly 79%, meaning his rooks have seen more late shifts than most night security guards.
- Early resignation rate: about 1%. He does not quit. He waits. He flags. He has won more than 800 games on time, a total best described as "flag connoisseur."
- Best hour to face him: never at 23:00, when he is nearly unbeatable. By midnight his win rate collapses to single digits, so a late-night rematch against Laffy77 is simply a matter of patience.
Rivalries and Nemesis Management
Some players bring out his best. axeakabari is 0-8 against him, darius98i is 0-7 with one merciful draw, and arthur_92i went 0-5. Then there is big bast, who leads 4-0 and clearly knows something the rest of us do not. Chess remains beautifully humbling for everyone involved.
Rapid Facts and One Daily Draw
- In rapid chess he is an absurd 19-2, despite claiming bullet is his real home.
- He has played exactly one daily game in his life. It ended in a draw. Correspondence chess, it seems, allows too much time to think.
- His longest winning streak is 11 games and his longest losing streak is 10, a perfectly balanced emotional rollercoaster.
- Most common checking piece: the queen, delivered over 4,500 times. Subtlety is for slower time controls.
- Curiously, he performs noticeably worse in rated games than casual ones, suggesting the stakes are the only thing that ever beats him.