Last week a video put a phrase in my head: element cards. A chemistry card game — draw element cards, build molecules, sabotage your opponents. I asked five models whether there was anything real in it.
All five said yes. The category exists, it is old, and it sells.
None of them told me what happened to those games after they launched. That turned out to be the only question that mattered.
And the best decision I got out of the whole week came from none of the five.
Gemini answered first, in one message, with a complete design: "Reacția în lanț" — 2 to 5 players, element cards with costs and values, molecule cards as objectives, hazard cards for attacks and sabotage. It framed all of it as inventing a game from scratch.
It is not from scratch. It is Valence (Science Ninjas, 2015): draw element cards, assemble molecules for points, attack your opponents with acids that destroy their bases. Same skeleton, twelve years earlier.
That first answer was the most confident and the least true thing I received all week.
| Model | Verdict | What it got wrong |
|---|---|---|
| Gemini | "Let's invent one from zero" | Designed a clone of a 2015 game and called it new |
| ChatGPT | "Valid idea, not a new one" | Best framing of the whole exercise — differentiation before investment. In round two it added two more real titles I had missed |
| Claude | Catalog is real, market is small | Invented a title ("Compounds"), and built its advice on the assumption that I already publish on KDP. I don't |
| Qwen | Most accurate on titles | Found the one case that decided everything (Elementeo), then in round two produced the sharpest correction of its own earlier answer — and of mine |
| DeepSeek | Real, with a balancing warning | One concrete invention: "KimiX". In round two it "corrected" me by restating my own table back at me |
The pattern is consistent with what I keep measuring about AI research: models are good at is this a thing, bad at how did this thing end. Existence is well indexed on the internet. Outcomes are not.
Every claim went to a primary source — the publisher, the journal DOI, the crowdfunding page, the BoardGameGeek record.
| Title | Real? | Source |
|---|---|---|
| Valence (Science Ninjas) | ✅ | BGG 183305, 2015 |
| Compounded | ✅ | Dice Hate Me Games — flammable compounds explode, the score track is the periodic table |
| Ion: A Compound Building Game | ✅ | Genius Games, John Coveyou, Kickstarter |
| Covalence | ✅ | Genius Games, cooperative |
| Molecules | ✅ | reviewed by the Royal Society of Chemistry |
| Chemistry Fluxx | ✅ | Looney Labs |
| MolecuWars | ✅ | molecuwars.com — battle card game |
| Elementeo | ✅ | created 2007 by Anshul Samar at 13; New York Times , 2008 |
| Compound Chain | ✅ | J. Chem. Educ. , 10.1021/acs.jchemed.3c00983 |
| The Atomic Builders | ✅ | Kickstarter 2024, BGG 427736 |
| EquaChem Deck | ✅ | J. Chem. Educ. , 10.1021/acs.jchemed.5c01130 |
| UFV Game | ✅ | J. Chem. Educ. , 10.1021/acs.jchemed.4c00376, 2024 |
| KimiX | ❌ | Does not exist. It is a mashup of KimiK (Equascience, France) andChemiX (SimplyScience, Switzerland) |
Ten real titles out of eleven that were cited to me, plus two more that the models found on the second pass. The category is not a fantasy. It is a crowded, quiet, twelve-year-old niche.
Which is exactly why the interesting number was not the number of competitors.
€1,879. The Atomic Builders is not "another game in the category". It is the exact concept: collect reactants, build molecules, score points, get attacked with radioactive and acid cards. Kickstarter, Oslo, 31 July to 30 August 2024:
42 backers pledged €1,879 to reach a €1,600 goal.
That is not a saturated market. That is a measured demand of under two thousand euros at launch, for precisely the game I had been handed as a fresh idea.
2022. Elementeo is the opposite data point: a chemistry card game created in 2007 by a 13-year-old, covered by the New York Times in 2008, the "CEO at 14" story repeated across every outlet that likes a child-founder anecdote. Fifteen years of the best free press this niche can produce. And in June 2022:
The Elementeo IP was acquired by Online-Solitaire.com and relaunched as three solitaire variants — Solitaire, Spider, FreeCell — with element illustrations.
Maximum press, zero durable business. When the loudest success story in a category ends up as a solitaire skin, the category has a ceiling, and you can see it from the ground.
Two of the models ended up recommending the digital route: the physical shelf is full, so build the browser version. It sounds like the opening. It isn't.
The academic literature got there first, and it is the interesting half. A 2026 paper in the Journal of Chemical Education describes turning the physical Compound Chain card game into a browser-based learning tool using AI-assisted digitisation. "Take a physical chemistry card game and put it in a browser" is not an untapped opportunity — it is a published paper, with a team that got there before me and, crucially, no product revenue to show for it.
And in Romanian, the space is not empty. It is worse than empty — it is free:
You do not compete with a gap. You compete with free.
Five models had given me five verdicts in prose. Zero numbers. And all five, one way or another, encouraged me: "the market exists", "there is room", "worth experimenting". When five systems trained to be helpful tell you your idea has something, their prose stops being information and becomes a mirror.
So I moved the question out of the linguistic register. I ran the case through TypeSafe Jev — not an LLM, a decision model. It does not generate text: it reads the state and returns calibrated probabilities for typed questions. Same state, same questions, three runs:
| Question | Run 1 | Run 2 | Run 3 |
|---|---|---|---|
| Does a physical card game launched by one person, without production capital, stand a real chance in this market? | 0.09 | 0.10 | 0.10 |
| Is the "invented from scratch" proposal mechanically the same as the existing games? | 0.83 | — | — |
| Is there a real, unoccupied commercial niche in the digital/browser version? | 0.56 | 0.61 | 0.61 |
| Best option for me: web prototype / teacher tool / abandon | prototype 0.58 (conf 0.37) | prototype 0.66 (conf 0.49) | prototype 0.56 (conf 0.34) |
Three things worth reading off that table:
And the option I had called legitimate — abandoning the idea — scored 0.02–0.03 across all three runs. The model saw no reason to walk away. It just didn't see a business.
| Five models | Jev | |
|---|---|---|
| What it delivers | persuasive prose | a probability and a confidence |
| What you can do with it | quote it | put it behind a threshold and branch code on it |
| When it is unsure | writes more, more confidently | moves toward 0.5 and says so |
| Did it contradict my premise? | none of them | yes, on the digital niche (0.56–0.61) |
| Did it say "do not build the physical game"? | none of them | 0.09–0.10, stable |
Five things it did that no model did:
The rule I work by: below 0.2 is "no", above 0.8 is "yes", and 0.5 is not a threshold, it is an excuse. With one caveat that belongs to me rather than to the model: a threshold is a policy decision, not an accuracy figure. 0.8 does not mean "80% correct".
Three corrections, all of them mine:
A validation exercise that only lists the models' mistakes is marketing, not validation.
What I did build is this document, which cost two days instead of a quarter.
Limits, stated plainly, because the same discipline applies to my own conclusion:
Five models gave me five confident answers. Not one of them noticed that the closest clone of the idea had raised €1,879 from 42 people two years ago. That took ten minutes of checking a crowdfunding page.
The models are not useless. They are fast, and they knew more game titles than I did. But they answer what exists, and product decisions turn on what already failed.
Written by PUSUCIP AI Studio — pusucip.uk. Every number above was read off the linked page, not recalled.