Avatar of Joshua Daniel Ruiz Castillo
Player Profile

Joshua Daniel Ruiz Castillo GM

joshdaruca Since 2016 (Inactive) Chess.com ♟♟♟♟
50.3% W 39.0% L 10.7% D
Bullet
2824
264W 221L 32D
Blitz
2802
2143W 1654L 476D
Rapid
2404
13W 5L 7D
Daily
1198
3W 2L 0D

Joshua Daniel Ruiz Castillo

Joshua Daniel Ruiz Castillo, known online as joshdaruca, is a FIDE Grandmaster whose online record mixes elite blitz firepower with a surprising amount of patience. His blitz rating graph reads like a very active heart monitor:

Blitz Rating283327382643254824522018: 24832019: 26472020: 27382021: 27362022: 27072023: 27612024: 27722025: 27922026: 2802201820192020202120222023202420252026
. At his sharpest, his blitz rating touched 2920 (2021-08-30), while bullet also flirted with 2900. For all that speed, the profile marks Daily as his preferred time control, and his few Daily games carry a much smaller rating, almost like a grandmaster taking a calendar nap.

The Opening Repertoire

Castillo is no beginner who hides in the center. With White he has a deep relationship with the Nimzo-Larsen Attack, and with Black he regularly steps into the Sicilian Defense: Najdorf Variation. His records include thousands of blitz reps in offbeat setups, including the Döry Defense and the English Opening, and the opening chart captures how wide his tested range really is:

Win Rate by Opening0%25%75%100%50%Nimzo-Larsen Attack: 49.0% over 308 gamesSicilian Defense: Najdorf Variation: 54.6% over 205 gamesColle System: Rhamphorhynchus Variation: 51.1% over 186 gamesEnglish Opening: Agincourt Defense: 50.0% over 176 gamesDöry Defense: 49.4% over 168 gamesHungarian Opening: Wiedenhagen-Beta Gambit: 50.3% over 145 gamesNimzo-Larsen Attack49%Sicilian Defense: Najdo…55%Colle System: Rhamphorh…51%English Opening: Aginco…50%Döry Defense49%Hungarian Opening: Wied…50%
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A Familiar Rival

Nobody appears more often across his played games than chessasuke, who met him 394 times during those online sessions. Castillo closed that heavyweight rivalry with a respectable edge: 195 wins, 146 losses and 53 draws against Carlos Antonio Hevia Alejano. He has also exchanged dozens of games with other regulars like sonofholygod, fedor_dvenyatin, and noukii.

Signs of Grit and Quirks

  • His longest winning streak reached 11 games, while his longest losing streak was 12, proving the storm can go some direction.
  • His comeback rate sits at 87%, and even after losing a piece he still wins about 48.6% of the time.
  • He rarely resigns early, with an early resignation rate under 1%, and about 84% of his games reach an endgame.
  • Before the late-night wars happened, his strongest hours were around 9:00, where his winning rate jumps to 68%.
  • He has logged around 4,900 online games in this sample, with over 4,300 of them in blitz, making the "Daily" preference feel like a sideline project.
Bio last updated 2026-09-07