Xavier Mastalerz (mastalerzxavier)
Xavier Mastalerz is a chess aficionado with a flair for blitz and bullet games that could make even a coffee-fueled grandmaster raise an eyebrow. His journey through the ranks reveals a relentless pursuit of the 64-square battlefield, where his rating has danced impressively from modest beginnings to a blistering peak of 2584 in blitz, achieved in April 2021. Not one to shy away from the lightning-fast chaos of bullet chess, Xavier also boasts a top bullet rating north of 2300, proving he's just as deadly when the clock's ticking down.
An enthusiast of sharp and occasionally cheeky openings, Xavier often deploys the French Defense Exchange Variation and the Bd7 Steinitz Boleslavsky system among others, showing a preference for solid structures sprinkled with tactical opportunity. His favorite daily battles have seen him dominate the Queens Gambit Declined Marshall Defense with a pristine 100% win rate—because who doesn’t love a good daily victory to start the day right?
With a psychological resilience hinted at by a 79.47% comeback rate after setbacks, he’s not one to throw in the towel easily (though he does have a modest 7.25% early resignation rate, proving even the best have their off-moods). Despite a quirky tilt factor of 13, Xavier plays his best games at the crack of dawn around 5 AM—a perfect time for creatures of the night and strategic geniuses alike.
His recent games tell a story of tactical grit and stamina, with victories by resignation and time management being common themes. Whether outmaneuvering opponents in complex French Defense lines or sealing the deal in fast-paced blitz skirmishes, Xavier’s games reflect not only skill but also an irresistible chess charisma.
In summary: Xavier Mastalerz is your go-to player for lightning-fast play and deep strategic battles, masterfully blending resilience, tactical acumen, and a hint of bravado. Watch out on the board—he’s a storm brewing, with a queen in his pocket and a knight in his sleeve.
What Xavier is doing well in these blitz games
You show a willingness to pursue active, tactical play when the position allows, and you keep the opponent under pressure with forcing moves. In the win against Minas_TV, you maintained piece activity and finished with a sharp, decisive finish that exploited the opponent's limited defensive resources. Across your recent games, you demonstrate good initiative and a sense for when to complicate the position to your advantage.
- You coordinate your minor and major pieces to create concrete threats, especially when you have the initiative.
- You capitalize on opponents' inaccuracies, turning dynamic chances into clear outcomes rather than trading into passive endgames.
- Your willingness to keep the attack with timely checks and active rooks helps maintain momentum in the middlegame.
Key areas to improve
- Time management in blitz: aim to preserve a usable clock into the later middlegame. If you’re low on time, switch to a safer, quicker plan to avoid rushing critical decisions.
- Calculation discipline: in complex tactical moments, slow down and systematically ask: what are the opponent’s immediate threats, what is the material balance, and is there a forcing line I am missing? Consider creating a short checklist before committing to a line (check for checks, captures, and threats).
- Endgame technique: when you transition to simplified positions, have a clear plan (e.g., activate the king, activate the rooks, create a passed pawn) to convert advantages efficiently.
- Opening depth: you’ve faced Queen’s Gambit Declined/Catalan and Indian Game setups. Build a compact, reliable 1- or 2-munch opening plan for each and practice the standard middlegame transitions that follow your chosen lines.
- Pattern recognition: reinforce common blitz motifs—back-rank awareness, overloads, and typical pawn breaks in your frequent structures—to improve quick decisions in the heat of the clock.
Practical plan for the next week
- Daily tactical practice: solve 15–20 puzzles focusing on motifs you see in your blitz games (pins, skewers, double attacks, back-rank ideas).
- Blitz practice with a structured review: play 3 short blitz sessions (3+2 or 5+0), then spend 5–10 minutes reviewing the key turning points of each game.
- Endgame drills: work on rook endings and basic king + rook endgames to improve conversion of advantages in blitz.
- Opening study sprint: pick two lines (one from Queen’s Gambit Declined/Catalan family and one from Indian Game family) and write a 5–7 move plan for white and for black, plus typical middlegame ideas.
- Post-game reflecting note: after each game, write a one-minute summary of the critical moments and one improvement point to reinforce learning.
🆚 Opponent Insights
| Recent Opponents | ||
|---|---|---|
| nobody | 0W / 0L / 1D | |
| desni93 | 0W / 1L / 0D | |
| premierchess64 | 0W / 2L / 0D | |
| horsens | 0W / 0L / 1D | |
| nimzo31 | 2W / 4L / 0D | |
| vardanyanarman123 | 0W / 1L / 0D | |
| inuyasha0105 | 0W / 1L / 0D | |
| mangekyovision | 0W / 1L / 0D | |
| thorice | 1W / 2L / 2D | |
| fibonacci26 | 1W / 0L / 0D | |
| Most Played Opponents | ||
|---|---|---|
| Nostradamus123 | 34W / 69L / 3D | |
| darkknightlupo | 34W / 21L / 4D | |
| Fabrice Wantiez | 30W / 20L / 6D | |
| mauricelion | 20W / 15L / 0D | |
| chesstintin15 | 20W / 13L / 0D | |
Rating
| Year | Bullet | Blitz | Rapid | Daily |
|---|---|---|---|---|
| 2025 | 2184 | 2431 | ||
| 2024 | 2233 | 2482 | 1595 | |
| 2023 | 2156 | 2243 | ||
| 2022 | 2247 | 2286 | 1861 | |
| 2021 | 2201 | 2315 | ||
| 2020 | 2204 | 2318 | 1469 | |
| 2019 | 2021 | 2242 | ||
| 2018 | 2081 | 2127 | ||
| 2017 | 1577 | 2134 | ||
| 2015 | 1823 |
Stats by Year
| Year | White | Black | Moves |
|---|---|---|---|
| 2025 | 275W / 266L / 89D | 229W / 332L / 74D | 78.1 |
| 2024 | 341W / 358L / 103D | 311W / 396L / 92D | 79.9 |
| 2023 | 229W / 283L / 70D | 236W / 273L / 71D | 81.2 |
| 2022 | 328W / 313L / 76D | 265W / 391L / 71D | 78.6 |
| 2021 | 304W / 341L / 92D | 313W / 338L / 69D | 76.2 |
| 2020 | 764W / 604L / 134D | 622W / 716L / 133D | 61.6 |
| 2019 | 466W / 428L / 142D | 393W / 536L / 110D | 78.9 |
| 2018 | 249W / 229L / 47D | 209W / 268L / 39D | 75.8 |
| 2017 | 101W / 81L / 16D | 89W / 87L / 17D | 80.5 |
| 2015 | 7W / 3L / 0D | 11W / 0L / 0D | 52.7 |
Openings: Most Played
| Blitz Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Unknown | 842 | 447 | 390 | 5 | 53.1% |
| French Defense: Burn Variation | 652 | 248 | 324 | 80 | 38.0% |
| Budapest: 3.d5 | 537 | 194 | 242 | 101 | 36.1% |
| French Defense | 502 | 195 | 244 | 63 | 38.8% |
| Döry Defense | 455 | 186 | 209 | 60 | 40.9% |
| French Defense: Exchange Variation | 307 | 134 | 133 | 40 | 43.6% |
| French Defense: Advance Variation | 293 | 118 | 154 | 21 | 40.3% |
| Amazon Attack: Siberian Attack | 251 | 97 | 126 | 28 | 38.6% |
| Colle System: Rhamphorhynchus Variation | 249 | 105 | 113 | 31 | 42.2% |
| Slav Defense: Bonet Gambit | 235 | 101 | 104 | 30 | 43.0% |
| Bullet Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Colle System: Rhamphorhynchus Variation | 190 | 89 | 84 | 17 | 46.8% |
| Amar Gambit | 180 | 78 | 87 | 15 | 43.3% |
| Australian Defense | 165 | 70 | 90 | 5 | 42.4% |
| French Defense | 133 | 61 | 66 | 6 | 45.9% |
| Döry Defense | 104 | 41 | 53 | 10 | 39.4% |
| French Defense: Exchange Variation | 85 | 35 | 46 | 4 | 41.2% |
| Barnes Defense | 82 | 42 | 35 | 5 | 51.2% |
| Amazon Attack: Siberian Attack | 80 | 33 | 41 | 6 | 41.2% |
| Alekhine Defense | 79 | 37 | 37 | 5 | 46.8% |
| Czech Defense | 73 | 35 | 33 | 5 | 48.0% |
| Daily Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| French Defense | 23 | 18 | 5 | 0 | 78.3% |
| Amar Gambit | 12 | 12 | 0 | 0 | 100.0% |
| Amazon Attack: Siberian Attack | 8 | 6 | 1 | 1 | 75.0% |
| Döry Defense | 7 | 5 | 2 | 0 | 71.4% |
| French Defense: Exchange Variation | 6 | 1 | 5 | 0 | 16.7% |
| French Defense: Advance Variation | 6 | 4 | 2 | 0 | 66.7% |
| Colle System: Rhamphorhynchus Variation | 6 | 6 | 0 | 0 | 100.0% |
| QGD: 2...Bf5 3.cxd5 | 6 | 6 | 0 | 0 | 100.0% |
| Barnes Defense | 5 | 3 | 1 | 1 | 60.0% |
| French Defense: MacCutcheon Variation | 5 | 3 | 1 | 1 | 60.0% |
| Rapid Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Catalan Opening: Closed | 1 | 0 | 1 | 0 | 0.0% |
🔥 Streaks
| Streak | Longest | Current |
|---|---|---|
| Winning | 27 | 0 |
| Losing | 13 | 0 |