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Bookup - Killer Chess Openings Software — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Board Games And Puzzles →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
365chessacademy.com ↗	72 match 1 shared topics	Killer Chess Training	en	board-games-and-puzzles WordPress WooCommerce	robotsllmsaihumans	emailphone	none
chesscentral.com ↗	70 match 1 shared topics	Chess Sets, Pieces, Software, Downloads and Supplies - ChessCentral	en	board-games-and-puzzles BigCommerce	robotsllmsaihumans	emailphone	none
thinklikeaking.com ↗	69 match 1 shared topics	SchoolChess.com's Think Like a King School Chess Software System	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
3-chess.com ↗	68 match 1 shared topics	3Chess - Play three player chess online	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
chessmanager.com ↗	68 match 1 shared topics	ChessManager - Chess Pairing Software	en	board-games-and-puzzles	robotsllmsaihumans	email phone	partial · 8
blindchess.org ↗	68 match 1 shared topics	Blindchess.org - Free Blindfold Chess Trainer \| Puzzles, Drills & Openings	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	partial · 8
onlinechess.com ↗	66 match 1 shared topics	iChess • Play Chess vs Computer	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
onilock.com ↗	66 match 1 shared topics	Home - Ait Ourir Chess Club	en	board-games-and-puzzles	robotsllmsaihumans	email phone	none
chessvibes.com ↗	66 match 1 shared topics	Chess.com - Play Chess Online - Free Games	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
inboxelo.com ↗	66 match 1 shared topics	Inbox Elo - Chess Analytics Delivered	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
247chess.com ↗	66 match 1 shared topics	Chess 247 - Play Free Chess Games Online	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
onlychessacademy.com ↗	66 match 1 shared topics	Only Chess Academy - Master Chess with Expert Guidance	en	board-games-and-puzzles	robotsllmsaihumans	email phone	none
spookychess.com ↗	66 match 1 shared topics	Spooky Chess Club	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
365chess.com ↗	66 match 1 shared topics	Chess Games Database Online - 365Chess.com	en	board-games-and-puzzles WordPress	robotsllmsaihumans	emailphone	partial · 3
torbaychessleague.com ↗	66 match 1 shared topics	Torbay Chess League	en	board-games-and-puzzles Joomla	robotsllmsaihumans	emailphone	none
0blunders.com ↗	66 match 1 shared topics	Chess Focus - Master Your Game	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
onlinequicktool.com ↗	66 match 1 shared topics	Online Quick Tool - Free tools, games and chess for everyone	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none
badatchess.com ↗	65 match 1 shared topics	Bad at Chess \| Play Online Chess Puzzles \| Chess Lessons	en	board-games-and-puzzles	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.