Avatar of Santiago Castillo

Santiago Castillo NM

Username: cabezauro

Location: Buenos Aires

Playing Since: 2013-05-07 (Active)

Wow Factor: ♟♟♟♟♟

Chess.com

Rapid: 2196
20W / 10L / 0D
Blitz: 2391
279W / 247L / 21D
Bullet: 2391
3315W / 3292L / 282D

Profile

Santiago Castillo, known online as cabezauro, is a titled chess player who earned the National Master title from National. They are a fixture in rapid events and bring a blend of fearless tactics and patient endgames to the board. Their preferred time control appears to be Rapid.

Profile: Santiago Castillo

Career Highlights

Since 2013, Santiago has competed across Bullet, Blitz, and Rapid, collecting wins and learning through every time-pressure moment. They are respected for tenacity, clever openings, and solid endgames that grind down over time.

  • Longest winning streak: 13 games
  • Longest losing streak: 14 games
  • Openings sharpness: frequent engagement with the French Defense, Sicilian variants, and Amar Gambit ideas
  • Consistent presence across rapid activity peaks in 2025
  • Staying power across years from 2013 to 2025

Quick snapshot of their rapid journey:

Rapid Rating2020202521961863YearRapid Rating

Playing Style

Fans describe Santiago's style as energetic yet pragmatic: tactical skirmishes complemented by solid endgame technique. They press when opportunities arise but are careful in complex positions, often turning small advantages into lasting pressure.

Personal Notes

Off the board, Santiago brings humor and curiosity to the chess community. If you catch a stream or a club game, you might hear a witty remark about a line in the Amar Gambit or a lighthearted take on the French Defense.


Coach's Avatar

Overview of your recent rapid games

You’ve shown strong competitive play in your most recent events, with a mix of clear wins and tough battles. The wins demonstrate your ability to press advantages and convert middlegame activity into decisive results. The losses highlight areas where a sharper focus on king safety and defensive structure can help you hold tougher positions. Your draws indicate you can navigate complex middlegames but there’s room to tighten conversion in slightly better positions.

What you’re doing well

  • You select aggressive and dynamic openings that give you early chances to seize the initiative, especially in lines like the Closed Sicilian family and certain aggressive variations. This suits your style when you spot tactical opportunities.
  • You handle middlegame tension well in several games, keeping pieces active and creating practical chances even when the position becomes sharp.
  • In the recent win, you managed the material imbalances effectively and found a tactical route to simplify into a winning endgame.

Areas to improve

  • King safety and back-rank awareness: in some middlegame-heavy games, your king became exposed. Build a small checklist to evaluate threats to your king before committing heavy pieces to the attack.
  • Endgame technique and conversion: when you have a material or positional edge, practice precise method to convert that edge into a win, especially in rook endgames or simplified positions.
  • Time management in the middlegame: balance calculating deeper lines with a practical plan. Set a time budget for critical branches to avoid last-minute pressure.
  • Deepening opening understanding: you’ve had very strong results in several openings, but a few lines show mixed outcomes. Consider focusing study on 2-3 openings where you’ve performed best to gain deeper, reliable results.

Key takeaways from the latest games

  • Win: You leveraged the middlegame initiative to force favorable simplifications and cleanly convert to victory. Continue seeking lines where you can simplify on your terms and pressure weaknesses in the opponent’s position.
  • Loss: The mate finish exposed gaps in defensive coordination and back-rank awareness. Prioritize prophylaxis—look for threats against your own king and pre-emptively address potential attackers.
  • Draws: You showed resilience in complex positions but could benefit from a clearer plan to transition from equal or dynamic middlegames into a winning plan.

Opening performance snapshot

Your results vary by opening, with several strong performances and a few lines that need more work. Notable positives include strong results in:

  • Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line
  • Barnes Defense
  • Amar Gambit
  • Caro-Kann Defense: Classical Variation
  • French Defense

Areas to approach with care include lines like the Sicilian Defense: Alapin Variation and the Vienna Gambit, where results have been less favorable. Consider deepening study in the openings you perform best to cement your understanding, and either reduce reliance on weaker lines or add targeted practice to raise confidence in them.

Placeholder for openings notes: santiago%27s%20opening%20focus

Practice plan to boost results

  • Focus on 2-3 openings where you already show strength. Deepen understanding of typical middlegame plans and common midgame tactical motifs arising from those lines.
  • Strengthen endgame practice with weekly rook endgames and basic technique for converting small advantages into wins.
  • Daily tactical training (15–20 minutes) with emphasis on back-rank motifs, deflection, and recognizing forcing lines to convert opportunities more reliably.
  • Time-management routine: before each game, set a rough plan for the first 15 moves and a separate plan for the middle game. Practice making decisions within a fixed time budget to avoid time pressure in critical moments.
  • Review strategy and prophylaxis after each game: identify one moment where you could have avoided a threat or improved your defensive posture, and create a concrete improvement target for the next game.

Next steps and drills

  • Replay your last two games focusing on the critical turning points. Ask: Was there a safer plan that still kept initiative? Could a different line in the opening have reduced risk?
  • Solve 10 tactical puzzles daily that emphasize back-rank safety, mating nets, and common deflection patterns.
  • Continue to play the openings you nail best in practice games, while rotating out the weaker lines until you’re confident you can handle them under pressure.

Notes

If you’d like, I can tailor a focused 2‑week study plan around your top-performing openings, with a short, structured drill sequence and a quick review template you can use after each game. You might also share a couple more recent games to refine the feedback with fresh concrete moments.



🆚 Opponent Insights

Recent Opponents
Ilyass Msellek 0W / 0L / 1D
Piotr Piesik 1W / 1L / 0D
rychessmaster1 1W / 0L / 0D
tiger 1W / 0L / 0D
Sergey Sklokin 0W / 1L / 0D
danilko_kirill 0W / 1L / 0D
madt2709 0W / 1L / 0D
davidn98 0W / 1L / 0D
boqart 3W / 0L / 0D
aksuited 1W / 0L / 0D
Most Played Opponents
redlilly10 30W / 14L / 3D
valemige 25W / 16L / 3D
eax 23W / 17L / 3D
rumpelstiltskin8 22W / 19L / 0D
Coach Jesse 11W / 22L / 1D

Rating

Year Bullet Blitz Rapid Daily
2025 2391 2391 2196
2024 2331
2020 2259 2328 1863
2019 2362
2016 2160 2137
2015 2166 1750
2014 2052 1722
2013 2137 1630
Rating by Year2013201420152016201920202024202523911630YearRatingBulletBlitzRapid

Stats by Year

Year White Black Moves
2025 748W / 818L / 67D 733W / 824L / 70D 74.2
2024 1W / 3L / 1D 3W / 2L / 0D 58.5
2020 9W / 3L / 1D 8W / 3L / 0D 75.8
2019 4W / 0L / 0D 3W / 1L / 0D 86.6
2016 488W / 423L / 30D 474W / 435L / 40D 73.2
2015 365W / 320L / 27D 338W / 344L / 29D 73.4
2014 21W / 33L / 2D 25W / 29L / 2D 75.4
2013 198W / 136L / 17D 181W / 156L / 15D 76.6

Openings: Most Played

Bullet Opening Games Wins Losses Draws Win Rate
French Defense 564 269 272 23 47.7%
Sicilian Defense: Closed 309 160 136 13 51.8%
Scandinavian Defense 289 139 140 10 48.1%
Czech Defense 256 127 120 9 49.6%
Amar Gambit 250 129 108 13 51.6%
Alekhine Defense 239 124 109 6 51.9%
Caro-Kann Defense 223 114 96 13 51.1%
French Defense: Classical Variation, Svenonius Variation 203 97 95 11 47.8%
Sicilian Defense: Alapin Variation, Sherzer Variation 201 91 100 10 45.3%
Modern 198 100 87 11 50.5%
Blitz Opening Games Wins Losses Draws Win Rate
Sicilian Defense: Taimanov Variation, American Attack 31 18 10 3 58.1%
French Defense 27 10 16 1 37.0%
Sicilian Defense: Alapin Variation 24 14 10 0 58.3%
Sicilian Defense: Closed 22 8 12 2 36.4%
Caro-Kann Defense 20 10 10 0 50.0%
Sicilian Defense: Alapin Variation, Sherzer Variation 20 8 12 0 40.0%
Barnes Defense 18 8 10 0 44.4%
Grünfeld Defense: Counterthrust Variation 17 7 9 1 41.2%
Bird Opening: Dutch Variation, Batavo Gambit 16 7 9 0 43.8%
Sicilian Defense 15 9 5 1 60.0%

🔥 Streaks

Streak Longest Current
Winning 13 0
Losing 14 3