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Effects of Caffeine on Chess Performance and Cognitive Function in Professional Chess Players

Study acronym: GRANDMASTER
StatusRecruiting
PhaseNot applicable
Started
View on ClinicalTrials.gov ↗
Trial flagged as At Risk
Primary completion moved at least 30 days later Jun 2027 → Jul 30, 2027
See other at-risk trials from St. Louis University

Record History

See every version on ClinicalTrials.gov ↗

  1. Recruitment opened Show 6 more changesShow less
    • Primary completion pushed from Jun 2027 to Jul 30, 2027
    • Study completion date: Aug 2027 to Aug 30, 2027
    • Start date changed from estimate of Jun 15, 2026 to Aug 25, 2026
    • Eligibility criteria expanded, about 17 words
    • Secondary endpoints: details revised at 7 of 7 entries
    • Site details revised
  2. Study First Submitted
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
This study will examine whether caffeine improves cognitive and competitive performance in professional chess players during tournament-style games. In a randomized double-blind crossover design, participants will complete two experimental sessions in which they consume either caffeinated coffee or decaffeinated coffee before playing a standardized chess match. Cognitive performance will be assessed using attention and reaction-time tests, including the Stroop Test, Trail Making Test, and Puzzle Rush task. Chess performance outcomes such as move accuracy, time management, and error rates will also be evaluated. The study aims to determine whether moderate caffeine intake enhances focus, alertness, and decision-making during prolonged competitive chess play.
Trial Details
NCT Number NCT07641335
Lead Sponsor St. Louis University
Conditions
(from sponsor)		 Cognitive Performance, Attention, Reaction Time, Caffeine
Related terms Mental Fatigue
Enrollment 12 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov