Loading
Kells is starting
The workspace is loading.
Kells reads the engine and master practice together and prices every move: what it costs you to remember, what it costs you to be ready for. Then it studies, checks and prepares from that price.
Scroll to see how
An engine tells you which move is best. It does not tell you which line is worth learning. Kells starts from a different question — what does this move cost the player who has to know it? — and builds its book, its studies and its checks on that price per move.
A move you must know by heart weighs more than one the position plays for you.
Every reply you have to be prepared for is part of the price of the move before it.
Good by the engine, good by practice, cheap to carry: that is the line the book puts first.
Three books side by side — the engine's, the masters', Kells' own — and every move graded and priced. Ask for more depth and the page keeps deepening while you watch.
Grades and prices are illustrative.
Pick a position and a side, and Kells follows every line worth following, prices each one and hands you the study as a PGN and a Polyglot book.
Paste your games or name your account. Kells walks each one move by move and marks where you left your lines, where a move was a mistake, and where a better one was waiting.
Findings are illustrative.
Give Kells an opponent's games and it draws their habits with each colour, then prices the lines worth having ready against them.
Opponent
From their recent games
Lines and shares are illustrative.
Open the book on any position. Studies, checks and preparations are a login away.