★ 11/12

Sudoku247Online

A free site with sudoku puzzles (4 difficulty levels, printing, a daily challenge) that recently added a game layer: experience points, daily streaks, a weekly leaderboard, duels…

ad-supportedprogrammatic-seosister-site-networknot-scrappy

Geo US 97% (SimilarWeb): almost no RU/CIS footprint

Founders —

Domains sudoku247online.com · sudoku247wiki.com · sudoku247kids.com · sudoku247print.com · sudoku247evil.com

Score demand 3 · ease 3 · ICP 1 · monetization 2 · freshness 2

Growth tactics (teaser)

a network of 4 satellite domains with dense internal cross-linking to the money site (a PBN pattern)
a late directory launch (Uneed.best, 2026-09-07) on top of 2 years of SEO content + the new gamification

🔒 Full dossier

Launch timeline, metrics, the growth mechanics taken apart and checkable sources — sent to your email after payment, as a .md attachment. The dossier itself is written in Russian; this page and the catalog are the English part.

Buy dossier · $5