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

2026年6月8日 更新者：Hossein Rafiei、St. Louis University

GRANDMASTER: Gauging the Role of Alertness and Neurostimulation With Dietary Caffeine in Master-Level Chess; A Double-Blind Randomized Crossover Trial

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.

研究概览

地位

尚未招聘

条件

干预/治疗

详细说明

This randomized double-blind crossover trial will evaluate the effects of moderate caffeine intake on cognitive and competitive performance in professional chess players. Twelve FIDE-rated chess players will complete two experimental conditions in randomized order: caffeinated coffee and decaffeinated coffee placebo. During each visit, participants will complete standardized cognitive assessments and a tournament-style chess game under controlled laboratory conditions.

Primary outcomes will include objective chess performance metrics derived from chess engine analysis, including move accuracy, centipawn loss, error rates, and time management. Secondary outcomes will include cognitive test performance, tactical reaction time, and self-reported alertness and fatigue. Chess games will be analyzed using standardized software-based evaluation methods.

The crossover design allows each participant to serve as their own control, minimizing variability related to individual differences in skill level, caffeine tolerance, and playing style. The study aims to determine whether caffeine enhances sustained attention, decision-making, and competitive chess performance during prolonged gameplay. Findings may provide insight into nutritional strategies for cognitive performance optimization in mentally demanding competitive environments.

研究类型

介入性

注册 (估计的)

12

阶段

  • 不适用

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习联系方式

学习地点

  • 美国
    • Missouri
      • St Louis、Missouri、美国、63104
        • Saint Louis University
        • 接触：
        • 首席研究员：
          • Hossein Rafiei, PhD

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

  • 成人

接受健康志愿者

是的

描述

Inclusion Criteria:

  • Male and female professional chess players aged 18-50 years
  • Current Fédération Internationale des Échecs (FIDE) standard rating between 2300 and 2600 Elo, or achievement of a standard FIDE rating within this range during the previous 12 months
  • Habitual caffeine consumers consuming ≤2 cups of coffee per day
  • Willingness to comply with all study procedures and study visits
  • Ability to provide written informed consent

Exclusion Criteria:

  • Non-caffeine users
  • Habitual caffeine intake exceeding 2 cups of coffee per day
  • Cardiovascular disorders
  • Metabolic disorders
  • Psychiatric disorders
  • Pregnancy or breastfeeding
  • Current smoking
  • Shift workers
  • Use of psychoactive medications
  • Participation in another clinical trial within the previous 3 months
  • Known allergy or intolerance to milk proteins, dairy products, or soy
  • Known red-green color blindness or other color vision deficiencies that may interfere with Stroop Test performance

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

  • 主要用途：基础科学
  • 分配：随机化
  • 介入模型：交叉作业
  • 屏蔽：三倍

武器和干预

参与者组/臂
干预/治疗
有源比较器：Caffeinated Coffee
Participants will consume one serving of black caffeinated coffee prepared from 15 g of ground coffee brewed in 200 g of water, providing approximately 100 mg of caffeine. The beverage will be consumed approximately 30 minutes before completion of cognitive testing and a standardized tournament-style chess game during the experimental visit.
膳食补充剂：Caffeinated Coffee
Black caffeinated coffee prepared from 15 g of ground coffee brewed in 200 g of water, providing approximately 100 mg of caffeine. The beverage will be consumed approximately 30 minutes before cognitive testing and tournament-style chess gameplay.
安慰剂比较：Decaffeinated Coffee Placebo
Participants will consume one serving of black decaffeinated coffee prepared to match the caffeinated coffee in taste and appearance. The beverage will be consumed approximately 30 minutes before completion of cognitive testing and a standardized tournament-style chess game during the experimental visit.
膳食补充剂：Decaffeinated Coffee Placebo
Black decaffeinated coffee prepared from the same batch of coffee beans and matched for taste and appearance to the caffeinated condition. The beverage will be consumed approximately 30 minutes before cognitive testing and tournament-style chess gameplay.

研究衡量的是什么？

主要结果指标

结果测量
措施说明
大体时间
Chess Performance Accuracy
大体时间：30 minutes after beverage consumption through completion of the tournament-style chess game at each experimental visit.
Chess performance accuracy will be assessed using engine-based analysis of tournament-style chess games. The primary reported metric will be average centipawn loss per move, with lower values indicating better chess performance accuracy.
30 minutes after beverage consumption through completion of the tournament-style chess game at each experimental visit.

次要结果测量

结果测量
措施说明
大体时间
Puzzle Rush Correct Responses
大体时间：Approximately 30 minutes after beverage consumption at each experimental visit.
Tactical accuracy will be assessed using the 3-minute Puzzle Rush task on Chess.com. The outcome will be the total number of correctly solved tactical puzzles, with higher scores indicating better tactical accuracy.
Approximately 30 minutes after beverage consumption at each experimental visit.
Puzzle Rush Response Speed
大体时间：Approximately 30 minutes after beverage consumption at each experimental visit.
Response speed will be assessed using the 3-minute Puzzle Rush task on Chess.com. The outcome will be average response time per puzzle, with lower values indicating faster response speed.
Approximately 30 minutes after beverage consumption at each experimental visit.
Stroop Test Performance
大体时间：Before gameplay and immediately after gameplay at each experimental visit.
Selective attention will be assessed using the Stroop Test. The outcome will be the change in Stroop Test completion time from before gameplay to immediately after gameplay, with lower completion time indicating better performance.
Before gameplay and immediately after gameplay at each experimental visit.
Trail Making Test Performance
大体时间：Before gameplay and immediately after gameplay at each experimental visit.
Cognitive flexibility and processing speed will be assessed using the Trail Making Test. The outcome will be the change in Trail Making Test completion time from before gameplay to immediately after gameplay, with lower completion time indicating better performance.
Before gameplay and immediately after gameplay at each experimental visit.
Self-Reported Alertness
大体时间：Pre-game and immediately post-game at each experimental visit.
Self-reported alertness will be assessed using a study-specific visual analog questionnaire. Higher scores will indicate greater perceived alertness.
Pre-game and immediately post-game at each experimental visit.
Self-Reported Mental Fatigue
大体时间：Pre-game and immediately post-game at each experimental visit.
Self-reported mental fatigue will be assessed using a study-specific visual analog questionnaire. Higher scores will indicate greater perceived mental fatigue.
Pre-game and immediately post-game at each experimental visit.
Average Time Per Move
大体时间：From the start of the tournament-style chess game until game completion, assessed over approximately 3 to 4 hours at each experimental visit.
Chess time management will be assessed as the average time used per move during each tournament-style chess game. This value will be calculated from the total game time divided by the number of moves completed by the participant.
From the start of the tournament-style chess game until game completion, assessed over approximately 3 to 4 hours at each experimental visit.

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

St. Louis University

调查人员

  • 首席研究员：Hossein Rafiei, PhD、St. Louis University

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (估计的)

2026年6月15日

初级完成 (估计的)

2027年6月1日

研究完成 (估计的)

2027年8月1日

研究注册日期

首次提交

2026年5月24日

首先提交符合 QC 标准的

2026年6月8日

首次发布 (实际的)

2026年6月11日

研究记录更新

最后更新发布 (实际的)

2026年6月11日

上次提交的符合 QC 标准的更新

2026年6月8日

最后验证

2026年6月1日

更多信息

与本研究相关的术语

关键字

其他相关的 MeSH 术语

其他研究编号

  • SLU-CHESS-CAFF-2026

计划个人参与者数据 (IPD)

计划共享个人参与者数据 (IPD)？

不

IPD 计划说明

Individual participant data (IPD) will not be publicly shared because this is a small pilot study involving highly specialized professional chess players, and there is potential risk of participant identification despite de-identification procedures.

药物和器械信息、研究文件

研究美国 FDA 监管的药品

不

研究美国 FDA 监管的设备产品

不

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