A free chess game analysis tool: import Chess.com/Lichess/PGN games and score every move with Stockfish, plus puzzles and training.
It parasitizes One-line growth story, compiled by us from public sources; speculation is marked separately below.
Checkout: checkout.stripe.com
“Links to a 'Puzzle Leaderboard' and Supercoach leaderboard; FAQ: 'Yes, completely. There is no paywall and no daily game limit.'”Quote from the site
New-user source: Other (Direct / referral / email / paid). Direct 58.4%, search 41.6%; search terms include generic ones like chess analysis and chess review, but the input data records the brand-keyword share as 100% (chessigma, chess sigma). Referrals are minimal (lichess.org 0.51%), AI referrals are Claude 0.3% and Gemini 0.19%. Returning users come back by direct visits and daily streaks.
Semrush source breakdown (desktop)
| Attributable new users, last month | Share |
|---|---|
| Other | 100% |
Direct + brand search 100%. Direct and brand search count as viral only when the site shows sharing mechanics; the largest share wins, under 5% means Other.
| Country | Share of visits |
|---|---|
| United States | 22.66% |
| India | 10.24% |
| Germany | 6.19% |
| United Kingdom | 3.56% |
| Brazil | 3.26% |
Countries (Semrush): India 13.9%, Bangladesh 13.2%, United States 9.4%, Indonesia 4.8%, Algeria 4.4%
English
YouTube, X (Twitter), Instagram
| Source | Share |
|---|---|
| Claude | 0.3 |
| Gemini | 0.19 |
| ChatGPT | 0.01 |
AI referrals (Semrush): Claude 5,775 (0.30%), Gemini 3,634 (0.19%), ChatGPT 157 (0.01%), fal.ai 67 (0.00%), Perplexity 23 (0.00%)
1.9K keywords · brand ~100% · organic 100% / paid <0.01%
| Similarweb top 5 keywords |
|---|
| chess analysis |
| chessigma |
| chess sigma |
| chesssigma |
| chess review |
4 referring sites
| Site | Share of referrals |
|---|---|
| lichess.org | 0.51% |
| Category | Share of referrals |
|---|---|
| Computers Electronics and Technology - Other | 23.11% |
| Board and Card Games | 13.95% |
Self-reported revenue on TrustMRR: MRR $7,620 (synced from the founder's payment account, trustmrr.com).
About 30,086 last month (Similarweb estimate), #83 of 606; the month before was 5,126. Opening checkout is not paying, so this is not revenue.
New-user source: Other (Direct / referral / email / paid). Mostly referrals, email or paid, or mostly direct with no clear source Direct 58.4%, search 41.6%; search terms include generic ones like chess analysis and chess review, but the input data records the brand-keyword share as 100% (chessigma, chess sigma). Referrals are minimal (lichess.org 0.51%), AI referrals are Claude 0.3% and Gemini 0.19%. Returning users come back by direct visits and daily streaks.
Free; $19/month; $140/year (about $11.67/month); lifetime $490
Dossier confidence: high. Parts 1 and 2 come from reading the site and Similarweb data; part 3 from public reporting, founder posts, Wayback snapshots, WHOIS and similar, with speculation marked.
The number: checkout visits is Similarweb's estimate of visits from the site to a checkout payment page; opening checkout is not paying, so this is not revenue. Small sites land on fixed buckets.
Data through last month. Page updated 2026-10-26.
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