Terms
What the diagnostic is
A structured opinion, not a rating. It places you on a ladder we defined, using answers only you can verify. It is not affiliated with chess.com, Lichess or FIDE, and the rating bands are approximate by design.
If you buy a guide
You get a PDF. Print it, keep it on your devices, use it forever. Don't resell it or share the file publicly. It is a digital file delivered the moment you pay, so it cannot be returned and is not refunded — which is why three pages of every guide are on the result page before the button, so you can see what you are buying.
What we don't promise
That you will gain rating points. Nobody can honestly promise that. What the guides contain is the standard, checkable body of chess improvement — endgame technique, calculation habits, planning — arranged by level, with positions you can verify on any board.