Sonia Zepeda - Woman International Master (WIM)
Meet Sonia Zepeda, a chess virtuoso with the official title of Woman International Master granted by FIDE. Often known online by the moniker Sonnyzc, Sonia has been dazzling opponents with her strategic genius since at least 2009, climbing Blitz ratings from a modest 1538 to a peak around 2153 in 2020. Not one to limit her talents, Sonia has also shown prowess in Bullet, Rapid, and Daily chess formats, with a particular flair for Blitz games where her win rate stands impressively over 56%.
With a longest winning streak of 11 games and an amazing 100% win rate in Daily and Rapid chess (albeit on fewer games), Sonia proves she can play patiently or lightning-fast, depending on the mood—and the opponent. Her psychological resilience is almost legendary, boasting a comeback rate of nearly 90% and a perfect win record after losing a piece. Clearly, Sonia's motto is "Never give up, or at least never before you've staged a dramatic comeback."
She's a broad daylight gladiator too—her games often average 70+ moves when winning, showing that she’s in it for the long haul, carefully outmaneuvering foes in epic endgames over 83% of the time. Quick to resign only 0.69% of the time (that's less than once per hundred games, thank you very much), Sonia’s endurance matches her brilliance.
Offline or online, you might catch her playing late at night – around 7am and noon, two times of day where her win rate humorously hits 100%. Maybe she’s had her coffee, or maybe she’s just a magical chess ninja who thrives in the odd hours.
Opponents beware: whether it’s Blitz, Bullet, or Rapid, Sonia Zepeda brings a blend of tenacity, tactical sharpness, and a dash of fun to the board. And if you lose to her, it might just be because she’s secretly a chess wizard disguised as a humble player—or because she studied her opponent’s weaknesses to an almost comical degree.
In short: if you see Sonnyzc challenging you, prepare for a fierce battle of wits—Sonia plays like someone who could checkmate you in your sleep.
Performance Feedback for Sonia Zepeda
Hi Sonia! I’ve reviewed some of your most recent games and here are some constructive points to help you improve further:
Strengths:
- Opening Knowledge: Your understanding of openings like the Queen's Gambit Declined and Italian Game is solid. You develop pieces efficiently and castle on time, ensuring king safety early on.
- Active Piece Play: You look for active squares and try to create threats, especially with knights and bishops. Moves like Ng5 attacking key squares and timely exchanges show good tactical awareness.
- Central Control: You consistently strive for control of the center with pawns and pieces, crucial for gaining space and maneuvering options.
Areas for Improvement:
- Endgame Technique: In some of your games, winning positions slipped away or your opponent managed to hold on longer than ideal. Working on fundamental endgames (king and pawn, rook endgames) can help convert advantages more reliably.
- Time Management: While you generally maintain a healthy clock, a few games showed a bit of rush in critical moments. Try to balance thinking time so key tactical or strategic decisions are given enough attention.
- Pawn Structure Considerations: Pay close attention to pawn breaks and when to trade pawns, especially around the center and on the flanks. Slight inaccuracies here sometimes give opponents counterplay that could be minimized.
- Calculation Under Pressure: Some losses involved letting the opponent seize the initiative with sharp tactics. Consistent tactical training and visualization exercises will help you spot threats earlier and increase your defensive resilience.
Suggestions:
- Review your recent wins and losses to identify recurring patterns in mistakes or missed opportunities.
- Focus on practicing endgames, for example with simplified material positions, as this will improve your confidence in closing out games.
- Work on visualization exercises such as solving tactical puzzles and blindfold calculations to sharpen your foresight during complex scenarios.
- Consider experimenting with different openings or deeper lines in your main repertoire to gain a strategic edge and familiarity.
Keep up the great work and continue learning from every game. Your passion and effort are evident, and with focused practice, you will see your rating and gameplay climb steadily.
Happy playing and learning!
🆚 Opponent Insights
| Recent Opponents | ||
|---|---|---|
| matador2507 | 1W / 0L / 0D | |
| coldplaybullet | 0W / 1L / 0D | |
| ssj2207 | 1W / 0L / 0D | |
| tryandmateme | 1W / 0L / 0D | |
| reclimb | 1W / 0L / 0D | |
| darwincantu | 0W / 1L / 0D | |
| marlonocho | 1W / 0L / 0D | |
| sealtiel4u | 0W / 1L / 0D | |
| dengmrefu | 1W / 0L / 0D | |
| krabin12 | 1W / 0L / 0D | |
| Most Played Opponents | ||
|---|---|---|
| artiga931 | 17W / 0L / 0D | |
| rafaelzepeda | 4W / 1L / 0D | |
| Jorge Ernesto Giron | 2W / 1L / 1D | |
| reiguitar | 3W / 1L / 0D | |
| tritter88 | 1W / 3L / 0D | |
Rating
| Year | Bullet | Blitz | Rapid | Daily |
|---|---|---|---|---|
| 2025 | 1765 | 2075 | ||
| 2024 | 1589 | 1891 | ||
| 2023 | 1901 | 894 | ||
| 2022 | 1975 | 768 | ||
| 2021 | 1866 | 2004 | ||
| 2020 | 1962 | 1994 | 2102 | 744 |
| 2009 | 1724 |
Stats by Year
| Year | White | Black | Moves |
|---|---|---|---|
| 2025 | 236W / 165L / 17D | 227W / 179L / 18D | 74.0 |
| 2024 | 13W / 14L / 0D | 9W / 16L / 1D | 74.7 |
| 2023 | 4W / 2L / 0D | 4W / 2L / 0D | 51.2 |
| 2022 | 5W / 0L / 0D | 4W / 2L / 0D | 59.9 |
| 2021 | 32W / 23L / 1D | 28W / 22L / 1D | 73.7 |
| 2020 | 268W / 151L / 23D | 235W / 183L / 24D | 76.2 |
| 2009 | 1W / 0L / 0D | 1W / 0L / 0D | 58.5 |
Openings: Most Played
| Bullet Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| French Defense | 61 | 38 | 22 | 1 | 62.3% |
| Sicilian Defense | 58 | 41 | 17 | 0 | 70.7% |
| Scandinavian Defense | 52 | 29 | 18 | 5 | 55.8% |
| Amar Gambit | 51 | 31 | 19 | 1 | 60.8% |
| Sicilian Defense: Closed | 33 | 14 | 14 | 5 | 42.4% |
| Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line | 30 | 18 | 12 | 0 | 60.0% |
| Sicilian Defense: Classical Variation | 28 | 16 | 10 | 2 | 57.1% |
| Bird Opening: Dutch Variation, Batavo Gambit | 26 | 13 | 11 | 2 | 50.0% |
| Italian Game: Two Knights Defense | 25 | 16 | 6 | 3 | 64.0% |
| Caro-Kann Defense: Exchange Variation | 24 | 10 | 14 | 0 | 41.7% |
| Blitz Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| French Defense | 63 | 38 | 21 | 4 | 60.3% |
| Sicilian Defense | 62 | 32 | 28 | 2 | 51.6% |
| Sicilian Defense: Closed | 50 | 30 | 16 | 4 | 60.0% |
| Italian Game: Two Knights Defense | 47 | 29 | 17 | 1 | 61.7% |
| QGD: 3.Nc3 Bb4 | 45 | 24 | 18 | 3 | 53.3% |
| Sicilian Defense: Alapin Variation | 43 | 22 | 19 | 2 | 51.2% |
| Sicilian Defense: Classical Variation | 40 | 24 | 12 | 4 | 60.0% |
| Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line | 38 | 20 | 17 | 1 | 52.6% |
| London System: Poisoned Pawn Variation | 37 | 19 | 16 | 2 | 51.4% |
| Sicilian Defense: Alapin Variation, Sherzer Variation | 36 | 24 | 12 | 0 | 66.7% |
| Daily Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Amar Gambit | 3 | 3 | 0 | 0 | 100.0% |
| Italian Game: Two Knights Defense | 2 | 2 | 0 | 0 | 100.0% |
| Nimzo-Larsen Attack: Classical Variation | 1 | 1 | 0 | 0 | 100.0% |
| Nimzo-Larsen Attack | 1 | 1 | 0 | 0 | 100.0% |
| Barnes Defense | 1 | 1 | 0 | 0 | 100.0% |
| Modern | 1 | 1 | 0 | 0 | 100.0% |
| Zukertort Opening: Queenside Fianchetto Variation | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line | 1 | 1 | 0 | 0 | 100.0% |
| Slav Defense: Bonet Gambit | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | 1 | 1 | 0 | 0 | 100.0% |
| Rapid Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Italian Game: Two Knights Defense | 1 | 1 | 0 | 0 | 100.0% |
| Bird Opening: Dutch Variation, Batavo Gambit | 1 | 1 | 0 | 0 | 100.0% |
🔥 Streaks
| Streak | Longest | Current |
|---|---|---|
| Winning | 11 | 1 |
| Losing | 8 | 0 |