FRITZ 20: When the Training Room Becomes the Toughest Opponent and the Most Loyal Ally

Bonn, 5 December 2026. I was sitting in front of a computer screen in Da Nang, more than nine thousand kilometres from Germany, watching Vladimir Kramnik slide his queen to e3. The software announced mate in one. Deep Fritz played Qh7. Kramnik resigned. The "Man vs Machine" match ended 4-2 in favour of the machine. I sat in silence for a long time. The strange feeling came from somewhere else: my living room had just turned into a stadium with no spectators.

Nineteen years later, that same lineage returns as FRITZ 20, and this time it has not come to defeat anyone. It has come to stay in your training room, every day, like a demanding and patient sparring partner. Draw back the curtain on speed and I meet an entire generation running — this time a generation of Vietnamese players running across a chessboard, with an engine small enough to fit in a coat pocket.

From the stage to the training room

The human-versus-machine matches are a chapter of their own in sports history. In October 2026, in Bahrain, Deep Fritz drew 4-4 with Kramnik. In January and February 2026, in New York, Kasparov drew 3-3 with Deep Junior. In November 2026, also in New York, Kasparov drew 2-2 with X3D Fritz. Then came Bonn in 2026, where the machine won 4-2. After that milestone, nobody staged exhibition matches of this kind any more, because the answer was settled.

Yet that was precisely the moment when the engine's real role began. Once the machine left the stage, it walked into the training room. From an opponent to be beaten, it became infrastructure: an analysis tool, a marking machine, an opening library and, most importantly, a sparring partner whose strength can be tuned.

The 2026 pandemic multiplied the speed of that shift. Pools closed, stadiums went dark, chess tournaments moved online. In Vietnam I watched small clubs in Da Nang, Hue and Can Tho move their training onto screens. At the same time, a generation of young players grew up with an engine on their laptops from the age of ten — something the generation of Le Quang Liem and Nguyen Ngoc Truong Son never had.

Le Quang Liem was the first Vietnamese player to cross 2,700 Elo, back in 2026. To travel from a boy in Ho Chi Minh City to that threshold, he had to build a training system that had almost no precedent in the country. FRITZ 20 is, in a sense, the commercial answer to the very problem he and his teammates once had to solve alone.

The core: a personalised training room

FRITZ 20 positions itself in three roles: your personal chess trainer, your toughest opponent and your strongest ally. Those three roles correspond to three very concrete groups of features.

First, a neural-network engine evaluates positions in a way that is closer to human intuition than earlier generations. For a trainee, the difference shows up in the suggestions: the moves the machine proposes usually carry strategic logic an amateur can grasp, rather than sacrificial sequences only a machine can see.

Second, adjustable playing strength is the most important training feature and the most underrated one. A 2,000-rated player sparring with an engine at full power learns very little, because every mistake is punished instantly and every good idea is refuted before it can take shape. Setting the opponent at or slightly above your own level creates healthy pressure: hard enough to force calculation, gentle enough that your ideas still get a chance to live.

Third is the checking toolkit: reviewing the mistakes in your own games, analysing a full game, and training an opening repertoire around your own system. This is where a Vietnamese player can close the gap in training conditions with the big European centres.

Based on my experience following matches, the real value of a program like FRITZ 20 lies not in the Elo it advertises but in its ability to record the user's error habits. I once built a track-and-field video series, "Drawing Back the Curtain on Speed", by replaying Nguyen Thi Oanh's laps in slow motion. That method works even better in chess, because chess already keeps a perfect record: every move is stored alongside the thinking time.

From the sandpit runway to the virtual arena — the homeland of sport has no borders. People talk about speed, but I find time. In chess, time is the only resource that separates a good player from a very good player of the same technical level. A program that can analyse both the quality of the moves and the rhythm of the thinking will show where a player spends time in the wrong places, and that is training data more valuable than any opening table.

The counter-intuitive angle: an engine is a mirror, not a teacher

Here I have to say plainly something the chess software industry rarely admits: analytical power has become a new form of divination.

Amateur players today switch on the engine evaluation, see the figure drop and believe they have just understood the problem. But that figure only says the position got worse; it does not say why, and it does not say what the player should be thinking on the next move. A beautiful heat map in the post-game report can make us feel we have learned something, when what actually happened is that we handed our judgement over to the machine.

With FRITZ 20 the risk is greater, because the program is designed to be friendly. A sparring partner that is too agreeable stops being a sparring partner. The right way to use it, in my view, is to set rules for yourself: analyse the game with your own head first, write down your conclusions, and only then open the machine to compare. At that point the engine does exactly what a mirror does — it shows you what you thought, instead of thinking for you.

There is another paradox. The higher the level, the more a player needs an opponent who makes mistakes the way humans do. The strongest engines are often useless here, because they never fall into the positions humans actually reach. A Vietnamese player preparing for an international tournament does not need to know the perfect move; they need to know what a human opponent will play under clock pressure. That is why I value training modes that simulate human style and human error above pure strength scores.

The polymath way of thinking in chess sits exactly here: the best trainee is the one who knows which tool answers which question, not the one who uses the most tools.

Closing thought

I used to think the end of the human-versus-machine era in Bonn in 2026 was a loss. Now I think differently. That ending opened something more interesting: a machine that no longer has to prove it is stronger than a human, and turns instead to helping humans understand themselves.

If you are a young Vietnamese player training alone in a room with no spectators, remember that the quality of your sparring partner decides the speed of your progress. FRITZ 20 can be that partner — provided you are brave enough to let it beat you every day, and clear-headed enough never to believe it forever.