Chess.com has become a blight on online chess. Not because of one bad experience with one company, but because of what happens when a private platform grows so dominant that an entire community depends on it while a fundamental problem — cheating — stays unresolved underneath the growth.
Chess is supposed to be a contest between two minds. When one player is secretly receiving computer assistance, the game stops being a competition. It becomes a performance being judged against someone who isn't playing by the same rules.
The Number That Gets Repeated: "Fewer Than 1%"
"Fewer than one percent of players cheat in online chess, so it is much less common than some people think."
— Chess.com — Chess Cheating: Our Fair Play System Explained
That number gets repeated constantly, and it deserves far more scrutiny than it receives.
A detection system can only count what it detects. If cheating gets past the system, it isn't included in the number. That makes the count of known cheaters inherently smaller than the count of actual cheaters whenever detection is imperfect. And detection is imperfect — by Chess.com's own numbers, its Fair Play Team closed roughly 314,000 accounts for fair play violations in a single quarter (January–March 2025), a pace of nearly 105,000 accounts every month, drawn from about 20 million games analyzed per day. Those are real, ongoing detections, which means the system is actively finding cheaters it hadn't caught before. Every one of those accounts spent time playing — and beating — real opponents before it was flagged.
The real question isn't how many cheaters Chess.com has caught. It's how many more are still playing right now, uncaught.
What My Own Games Told Me
I have my own experience to compare against that headline number. Across approximately 200 games, I have personally identified nearly 50 opponents who were subsequently banned for Fair Play violations. That's roughly one in four games in my personal sample involving an account that was eventually banned.
That is obviously not a claim that 25% of Chess.com's entire user base cheats. My games are a selected sample, not a random study of the platform — I tend to notice and flag suspicious play, so my sample is going to skew toward exactly the accounts that later get caught. But it is an extraordinary difference from the impression created by "fewer than 1%," and it illustrates why a platform-wide statistic based on detected cheating tells an individual player very little about what they're actually going to encounter at the board.
More importantly, those nearly 50 are the people who were eventually caught. What about the ones who weren't? That's the number nobody can see — not me, not Chess.com's Fair Play Team, not the player who just lost a game they should have won.
The Cheating That's Designed to Be Invisible
The problem gets considerably worse when the cheating isn't blatant.
A player doesn't have to turn on an engine and copy its moves for an entire game. They can use assistance selectively — consulting an engine only in difficult positions, or receiving help only at the critical moments where it actually swings the result. The more selectively assistance is used, the harder it becomes to distinguish from legitimate strong play.
That's the environment in which a simple percentage of detected cheaters becomes especially misleading. The statistic cannot include behavior the detection system never identifies in the first place, and selective assistance is specifically the kind of behavior built to slip past pattern-based detection.
Why This Problem Is Worst at the Bottom of the Ladder
Beginners are the future of chess. They're the people who just discovered the game — kids learning their first openings, casual players who might eventually become serious competitors, coaches, organizers, or lifelong members of the chess community.
They're also the least equipped to understand what they're seeing when something feels wrong. A new player loses repeatedly to opponents who seem inexplicably strong. They encounter suspicious games with no frame of reference for how suspicious is too suspicious. They don't know whether they're witnessing legitimate ability or assistance — and this isn't a hypothetical edge case. Nearly 40% of the accounts Chess.com closes for cheating are less than two weeks old. A huge share of the cheating on the platform is happening to people who are brand new to it.
Eventually, some of those new players reach the simplest conclusion imaginable: chess isn't worth playing.
That's the part a platform-wide "fewer than 1%" statistic overlooks entirely. You can lose an experienced player and lose one experienced player. Drive away enough beginners, and you damage the future supply of players entering the entire ecosystem. The bottom of online chess isn't an insignificant corner of the market — it's the front door. If the front door is a hostile experience, people stop coming inside.
I Reported a Cheater. Chess.com Muted Me.
This is where my criticism of Chess.com stops being just a complaint about detection accuracy.
There are procedures and technological approaches I believe could substantially improve the situation. I proposed them. They weren't implemented.
That's genuinely frustrating, because I didn't originally build D4 Chess Club™ to fight Chess.com. It was built to complement it. I wasn't trying to take Chess.com's market or destroy the company — the idea was to build something that gave players different tools for learning, understanding mistakes, recognizing threats, and improving. I even wanted to help solve problems affecting the existing chess ecosystem, Chess.com included.
Then I had my own experience with Chess.com's approach to cheating.
I called out a player I believed was cheating. Chess.com muted me. The player was subsequently banned.
Think about that. The person who raised the alarm was punished, and the person being called out was later removed for cheating.
I understand the argument against letting players publicly accuse opponents without evidence — that's a reasonable moderation policy on its own. But when someone raises a legitimate concern and the response is to silence them, while the accused player is later banned for exactly the thing they were accused of, the platform has built a very strange incentive structure. It tells players to report problems, but discourages them from talking about problems. It tells players to trust the system, while giving them no way to know how many cheaters that system has failed to catch. And it leaves the player wondering whether speaking up is going to make them the next one who gets punished.
That isn't how you build trust. That's how you destroy it. And once trust starts disappearing, market dominance becomes a liability instead of an advantage.
I Didn't Set Out to Compete With Chess.com
I built D4 Chess Club™ because chess apps kept showing me the right answer instead of teaching me to see the board — that was the original, entirely different problem I was solving. I've written before about why D4 Chess Club™ isn't trying to be another Chess.com: different products, different jobs, room for both. I still believe that's true for the vast majority of what we build — the AI coaching, the intent-based analysis, the puzzle system built around pattern recognition instead of just move-finding.
But my attitude toward Chess.com specifically has changed. Chess.com has enormous market share, but it doesn't own chess. Chess existed long before the company and will exist long after it. Players aren't property, communities aren't permanent, and a developer isn't obligated to leave a market untouched just because an incumbent got there first and grew large.
Chess.com Isn't Chess
It wasn't supposed to be a war. But I'm no longer interested in protecting Chess.com's position simply because I originally intended to complement it.
If Chess.com won't implement solutions that could address real weaknesses in its approach to cheating, someone else can build them. If players don't trust the existing platform, they should have another choice. If the market leader won't provide that choice, I will.
If I have to compete with Chess.com, I will.
And if D4 Chess Club™ eventually takes users, attention, and market share away from Chess.com, that isn't an attack on chess. It's competition. Chess.com isn't chess — it's a company that happens to occupy an enormous position within the chess ecosystem, and companies can be replaced. The future of chess should belong to the players, not to whichever company happens to dominate the market today.
If you're tired of wondering whether the player who just beat you was actually better than you, D4 Chess Club™ is built around a different premise: your improvement, measured against your own games, not against however many undetected engines happen to be online tonight.
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