Beyond the board, the true battle is fought within the bloodstream: an inquiry into the biology of concentration, the glucose curve, the food you need during a chess tournament, and the architecture of the mind sport diet.
Those among us who have ever stepped into the silent, pressurized arena of an official chess tournament—especially at a professional level—will recognize the peculiar landscape of obsessions. The air in the hall is heavy, thick with the invisible weight of calculation. And within it, the players. Each one a study in eccentricity. Small rituals. Clandestine habits. A lucky pen, a specific sequence of breathing, a rigid refusal to look an opponent in the eye.
In the heat of competition, the mind reaches for any anchor to steady itself against the ticking clock.
Yet, amidst this theater of quirks, there is one secret weapon often overlooked, though its impact is more profound than any opening theory or endgame maneuver: the biology of the human brain.
Personally, my devotion belongs not to chess, but to Othello—one of its many younger siblings. A pursuit of many years, defined by regular presence in international tournaments and occasional contributions as an author for the World Othello Federation. Those who have watched me in those halls know I am a permanent resident of that eccentric category: a figure often experimenting with jars of jam and mysterious bottles of juice, often preaching around about it.
I am also a seeker of the mind’s most fascinating nuances, specifically where the intellect meets its own borders. And there is nothing quite as challenging as a day spent squeezing the very essence from one’s brain at a mental sports tournament—regardless of the game.
From my experience, and that of competitors worldwide, the lesson is stark: a focus on nutrition is a requirement. When pursued with method and a scientific eye—testing alternatives until the ideal resolution is found—it yields a practical wisdom useful to all.
This is the origin of this inquiry. Not a product of an academic pedigree, but the meticulous analysis of an operator in the field. While my initial findings were chronicled as a practical nutritional guide for the World Othello Federation—a manual born of experience—this space invites a different kind of excavation: not merely the tactics of the meal, but the profound challenge of the human brain when it’s pushed to its edge.
How important is nutrition for concentration?
In truth, nutrition is everything. Those moments when our mind feels untethered, unfocused, or fragile—whether in the quiet of daily life or the crucible of a high-stakes tournament—are often dictated by what is placed on our plate.
We are prone to a certain intellectual romanticism. We imagine ourselves as luminous, high-functioning beings—entities of pure thought, ethereal calculation, and complex strategy. But we must also learn to perceive the machine. The reality is far less poetic: at our core, we are biological engines, translating raw calories into the high-voltage electricity of cognition.
To many, it feels jarring to link abstract virtues—mathematical precision, emotional resilience, the cold logic of a mental sport—to the mundane reality of biology. Yet, the bridge exists, and modern psychology demands we recognize it. Those who have encountered the work of Robert Sapolsky will recall his primary defenses against burnout, depression, and intrusive thoughts: movement and healthy nutrition.
The marathon of our mind
It is a logical inevitability. Whether at a chessboard or within the deep silence of any other mind sport, we are engaged in an athletic pursuit. To prevail, the brain—that relentless, demanding organ—must fire on every cylinder. We must treat it as what it truly is: a biological machine with a specific, undeniable cost of operation.
Many in the mental sports community are no strangers to physical endurance. They run marathons. They push the body toward its outer limits. They understand the connection—the self-challenge, the meticulous planning of the stride, the training of the legs. No one stands at the starting line of a forty-kilometer race having neglected their fuel. No one expects the body to perform after the heavy, sluggish weight of a lasagna.
A tournament of the mind is no different. Months spent in study. Theories refined. Tactics sharpened. To ignore the fuel is to sabotage the engine. It is to attempt a marathon while the body still struggles with the weight of a reckless lunch.
The specter of glucose depletion
Every time we ask ourselves how a trap could have remained invisible, or how a match that was firmly in our grasp could have slipped away, the answer was likely etched in something far more physical than a mere lapse in concentration or a fleeting distraction. It is often the result of a force more formidable, yet far more manageable: the systemic glycemic collapse.
When we immerse ourselves in the arena of a mind sport—especially when the stakes of a tournament are high and the weight of observation is heavy—we encounter a phenomenon strikingly similar to the classic “sugar crash.” A sharp peak of blood glucose, followed by a visible, staggering plunge. An energy curve that eventually sinks below the very baseline where the day began.
This is the Tournament Adrenaline—the body’s primitive response to intellectual war. The liver, sensing the urgency of the moment, incinerates its stored glycogen reserves, flooding the system with fuel.
But while this surge of glucose invades the body, the brain is not taking a leisurely stroll by the lake. It is engaged in a sprint uphill, at full velocity, maintained for sixty minutes at a stretch. The mind consumes this “emergency fuel” at a terrifying rate. The result is a post-meal collapse that is more than a mere crash; it is a systemic betrayal.
It is the moment the “Thinking Machine” hits the red line. And in that hollow silence, we lose the match that defines our entire tournament.
A Stable Foundation: The Champion’s Formula
The solution resides in the most classical of advice: starting the day right. It begins with a breakfast anchored by the three fundamental pillars of slow-release energy: complex carbohydrates, healthy fats, and lean proteins.
For those even slightly versed in the principles of nutrition, this is familiar territory. Complex carbohydrates provide the essential stability—a slow, sustained infusion of fuel for the hours ahead. When paired with proteins and fats, this release is tempered even further. Magically, the glucose introduced into the system doesn’t vanish after two hours; instead, it offers an enduring presence.
When this trinity converges on the lunch plate, the Thinking Machine no longer faces a desperate sprint uphill. It finds itself on a high, level plateau—a space where the mind can finally focus on the board rather than its own physiological survival.
Personal Rituals: Sustaining the Tournament Marathon
Even with a foundation of stability, the mental marathon demands active maintenance throughout the day. It is in this space that each player discovers their subtle stratagems—those friendly adjustments and personal rituals that preserve one’s condition until the grueling final rounds.
The “friendly” foods used for these refinements vary, and their adoption during a tournament is part of that quintessential collection of experiments aimed at maximizing performance. These range from liquid formulas resting beside the board to those rapid nutrient infusions that ensure survival when the memory of the last meal has long since faded.
The building blocks remain constant, but the delivery mechanism to the brain adapts—sometimes manifesting as a banana, a few squares of dark chocolate, or other “emergency aids.” Above all, remember to engineer your lunch with precision: do not let a midday avalanche of simple carbohydrates dismantle the psychological and physical endurance you have meticulously built since dawn.
Your Next Move: Study and Experiment
In the end, we return to our natural attitude in all this. There are basic rules, nutritional guidelines, and endless combinations to explore—just as there are countless openings, traps, and endgame strategies to master if one wishes to join the ranks of champions.
Struggling with the natural limits of our body and mind remains one of the most satisfying challenges of a life lived with intention. The board before us may seem small and simple, but it is an abstract playground where we test our very essence. And that test is not merely an exercise in thought: it begins with the very physical bricks of our existence—the nutrients we ingested that morning.
Therefore, it is only natural to extend our study beyond the game itself. There may be many books or guides you can still enjoy for chess or any other abstract game you like, but if you don’t couple them with at least one good strategy for your nutrition and carefully plan the food you’ll have, the risk is clear: you are trying to drive a Ferrari but you forgot to stop at the gas station.
For those who seek to translate these principles into a meticulous, hour-by-hour itinerary, I have detailed a more tactical schedule in my original guide for the World Othello Federation: a humble but precise step-by-step chronicle of how I carefully plan a tournament day—and the benefits of it.
