Maria Ester Mencos Castillo: Woman International Master & Chess Enthusiast
Born to checkmate and conquer, Maria Ester Mencos Castillo, often known online as Maria_Mencos_GUA, wears the prestigious title of Woman International Master granted by FIDE. She’s a fearless tactician who has danced through the tactical jungles of rapid, blitz, and daily chess games — proving that patience, persistence, and a little bit of cunning go a long way.
Chess Journey & Style
Whether wielding the white or black pieces, Maria plays with tenacity and an eye for the endgame, which she frequents impressively in over 84% of her games. Known for her remarkable comeback ability (a staggering 89% come back rate!), she’s the kind of player who refuses to throw in the towel early — her early resignation rate is a perfect zero.
Maria is no stranger to grind-it-out battles either; her average winning games stretch nearly 76 moves, signaling a dogged, strategic approach. Psychologically, she can sometimes tilt (a factor of 7), but hey — who doesn’t after seven consecutive losses? Good thing her current winning streak is a fresh and lively 5 games!
Competitive Highlights
- Peak Rapid rating of 1872 in August 2020
- Blitz top rating soaring to 1853 in March 2021
- Unstoppable in Daily chess with a perfect 100% win rate over 3 games
Victories & Memorable Moves
Maria’s tactical prowess shines brightest in her recent daily games — for instance, her last win ended with a slick checkmate that left her opponent staring at the board, wondering how that queen just snuck in. She’s also known to win closely contested time scrambles, proving nerves of steel and fingers faster than lightning.
Win-Loss Stats & Opponent Rivalries
With a combined record boasting 73 wins against 68 losses and 16 draws across her preferred formats, Maria has met many adversaries — notably having fierce battles against rubengold30 (46 games!). Fun fact: some opponents have a 100% win rate against her — guess she inspires a strong game — while she herself holds 100% wins against a handful of challengers, including swagger1111 and ning-kemenji.
Off the Board
When not plotting the next brilliant check, Maria’s best time of day to play is at the crack of dawn (~6 AM), a perfect moment to outwit foes before breakfast. And while her psychological tilt factor might be modest, it’s no match for her love of the game — embarking on every match with fresh hope and strategy.
Whether you’re a fan of slow strategic maneuvering or adrenaline-packed blitz duels, Maria Ester Mencos Castillo is a name to watch — a chess warrior who embodies resilience, passion, and that delightful spark that makes chess wonderfully unpredictable.
Hi Maria Ester!
Great work on your recent games – it’s clear you enjoy sharp, fighting positions and you’ve collected some nice attacking wins, such as your latest checkmate against Sergio Ibarra. Below is a snapshot of your progress and some ideas to help you keep climbing.
What you’re doing well
- Tactical Awareness. In several victories you uncovered forks, pins and mating nets (e.g. 20…Qg3+!! in your most recent win). Your eye for cheapos and double–attacks is a big asset at this level.
- Active Piece Play. You often place pieces aggressively (♘f5, ♗g5, queen on h5) which creates practical problems for opponents who are not fully developed.
- Opening Variety. You’ve tried both 1.e4 and 1.d4 with White and answer 1.e4 with Caro-Kann, Sicilian and French-like structures as Black. Experimentation is good for learning pattern recognition.
- Rating Trend. 976 (2025-03-20) and 1853 (2021-03-06) are slowly edging upward – keep the momentum!
Main improvement themes
- Time Management. A high percentage of your losses are flagged “lost on time”. Try:
- Playing a few rapid (10 | 0 or 15 | 10) games to practise thinking without constant time pressure.
- Using a move-check routine: “Threats? Checks? Captures?” for 5-10 seconds each move to avoid burning minutes on one decision.
- King Safety & Pawn Hygiene. Several defeats came after pushing too many flank pawns (h- or g-pawns) early, leaving dark-square holes around your king. Balance aggression with safety: develop, castle, connect rooks, then launch pawns.
- Endgame Technique. When you reach rook endings (e.g. your loss vs NotVietnamese) you sometimes allow passive rooks and advanced passed pawns for the opponent. Study the “rook behind the passed pawn” rule and practise basic king + pawn endings.
- Converting Advantages. In several winning positions you kept attacking instead of simplifying. When up material, look for exchanges that steer the game into a winning endgame. Remember the concept of zwischenzug and tempo moves to trade on your terms.
Opening focus for the next month
| Colour | Recommended repertoire tweak | Goal |
|---|---|---|
| White | Zukertort setup (d4, Nf3, e3, b3, Bb2) | Solid structure, easy plans, fewer early tactics to miss. |
| Black v. 1.e4 | Caro-Kann: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 | Sound, teaches you pawn-chain logic & long-term planning. |
| Black v. 1.d4 | Queen’s Gambit Declined (d5, e6, Nf6, Be7) | Improves understanding of classical development and breaks. |
Target drills
- 15 daily puzzles focusing on forks & pins.
- 1 endgame lesson per week (start with “Rook vs. Pawns”).
- Analyse each game for 5 minutes: write one sentence on what you would change.
Useful visuals
Explore your play-time habits and see when you perform best:
Annotated highlight
Here’s the critical attacking sequence from your latest win – play it through and notice how every move increases pressure:
Next steps
Keep enjoying chess! With sharper time management and a bit more attention to king safety, you’re on track to break 1000 very soon. Let me know when you smash that milestone – we’ll set new goals together.
Good luck and happy studying!
🆚 Opponent Insights
| Most Played Opponents | ||
|---|---|---|
| Rab X | 21W / 20L / 5D | |
| Ruben Flores | 2W / 7L / 0D | |
| Terrordelcaribe94 | 0W / 6L / 0D | |
| Luisa Diaz | 2W / 1L / 0D | |
| Sergio Ibarra | 3W / 0L / 0D | |
Rating
| Year | Bullet | Blitz | Rapid | Daily |
|---|---|---|---|---|
| 2025 | 976 | |||
| 2024 | 918 | |||
| 2023 | 854 | |||
| 2022 | 1545 | 1673 | ||
| 2021 | 1586 | 1691 | ||
| 2020 | 1465 | 1848 | ||
| 2019 | 1172 | |||
| 2012 | 1172 |
Stats by Year
| Year | White | Black | Moves |
|---|---|---|---|
| 2025 | 0W / 0L / 0D | 1W / 0L / 0D | 56.0 |
| 2024 | 2W / 0L / 0D | 0W / 0L / 0D | 35.0 |
| 2023 | 3W / 0L / 0D | 3W / 2L / 0D | 69.4 |
| 2022 | 0W / 3L / 1D | 2W / 1L / 1D | 67.1 |
| 2021 | 10W / 6L / 4D | 11W / 7L / 4D | 69.8 |
| 2020 | 8W / 8L / 0D | 9W / 8L / 1D | 85.4 |
| 2019 | 0W / 3L / 0D | 0W / 3L / 0D | 57.8 |
| 2012 | 14W / 10L / 4D | 10W / 17L / 1D | 93.2 |
Openings: Most Played
| Daily Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| London System: Poisoned Pawn Variation | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense: Closed | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense: Paulsen Variation, Bastrikov Variation, English Attack | 1 | 1 | 0 | 0 | 100.0% |
| Blitz Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Italian Game: Two Knights Defense | 12 | 7 | 5 | 0 | 58.3% |
| Sicilian Defense: Closed | 12 | 6 | 5 | 1 | 50.0% |
| Elephant Gambit | 11 | 5 | 6 | 0 | 45.5% |
| Blackburne Shilling Gambit | 8 | 6 | 0 | 2 | 75.0% |
| Bishop's Opening: 3.d3 | 7 | 6 | 1 | 0 | 85.7% |
| Giuoco Piano: Tarrasch Variation | 7 | 4 | 2 | 1 | 57.1% |
| Döry Defense | 6 | 3 | 3 | 0 | 50.0% |
| Caro-Kann Defense | 5 | 3 | 1 | 1 | 60.0% |
| Amazon Attack: Siberian Attack | 4 | 2 | 2 | 0 | 50.0% |
| Philidor Defense | 4 | 1 | 2 | 1 | 25.0% |
| Rapid Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Sicilian Defense: Closed | 5 | 1 | 4 | 0 | 20.0% |
| Elephant Gambit | 4 | 3 | 0 | 1 | 75.0% |
| Giuoco Piano: Tarrasch Variation | 3 | 1 | 1 | 1 | 33.3% |
| Caro-Kann Defense | 2 | 0 | 2 | 0 | 0.0% |
| Queen's Gambit Declined: Hastings Variation | 2 | 0 | 1 | 1 | 0.0% |
| French Defense: Burn Variation | 2 | 2 | 0 | 0 | 100.0% |
| English Opening: Agincourt Defense | 2 | 1 | 1 | 0 | 50.0% |
| Scandinavian Defense | 2 | 1 | 1 | 0 | 50.0% |
| English Opening: Symmetrical Variation, Fianchetto Variation | 1 | 0 | 0 | 1 | 0.0% |
| Four Knights Game | 1 | 0 | 1 | 0 | 0.0% |
🔥 Streaks
| Streak | Longest | Current |
|---|---|---|
| Winning | 5 | 5 |
| Losing | 7 | 0 |