xiaottt5164: The National Master Who Never Learns His Own Name
Online chess is full of mysteries. Some players hide behind cool nicknames; this one hides behind the display name Unknown Unknown. Under the username xiaottt5164, a National Master has built one of the most relentless blitz accounts around. He prefers bullet, but his blitz board is where the fireworks really happen.
From 1681 to the Stratosphere
xiaottt5164 first appeared in the rating records in 2019 with a modest blitz rating of 1681. From there, the climb was anything but linear. He grinded thousands of games, survived an 11 game losing streak, and kept coming back with a 13 game winning streak. His peak blitz rating reached 2861 (2026-07-29), which is remarkable for someone whose preferred time control is bullet.
Opening Repertoire: All Roads Lead to e4
If you face xiaottt5164 and he has the white pieces, expect 1.e4. He has played it thousands of times. He loves the Sicilian Defense: Najdorf Variation, the Caro-Kann Defense, and the Ruy Lopez: Berlin Defense, Berlin Wall. As white, his Najdorf score is 56.82%, and his Czech Defense score is 53.33%. As black, he often reaches the Caro-Kann and the English Opening's Agincourt Defense, where he fights hard even when the position gets messy.
A Marathon Runner, Not a Sprinter
This National Master does not believe in quick handshakes. His early resignation rate is just 0.4, and he reaches the endgame in about 81.89% of games. His wins take an average of nearly 83 moves, which means his opponents earn every loss. He also wins 45.62% of the time even after losing a piece, and his comeback rate sits at 90.3%. The data says his best time of day is 17:00, so if you see him online around 5 PM, maybe log off.
Rivalries and Repeat Customers
Some players become familiar faces. xiaottt5164 has faced Eric Lobron 31 times, with a tight 13 win, 16 loss, and 2 draw record. He has also traded blows with Roberto Mogranzini, against whom he has a healthier 9 wins, 5 losses, and 3 draws. Other frequent opponents include sanjeev_18, maddcold, and ikkphd. These are not one-off battles; these are ongoing soap operas.
Fun Facts From the Data
- Longest winning streak: 13 games
- Longest losing streak: 11 games, but he came back anyway
- Favorite checking piece: the queen, by a wide margin
- White win rate: 49.94%
- Black win rate: 43.5%
- Rapid peak: 2549 (2025-10-16)
- Tilt factor: 11, with a comeback rate of 90.3% to balance it out
- He delivers checkmate in about 0.72% of analyzed games, preferring to win by resignation or timeout