Novelty Hunter

Find interesting opening ideas for your next game!

Find novelties in games starting from this position:

Find novelties in last:

or drop a

Side that plays the novelty:

Required to query the Lichess Masters database.

Minimum White Elo

Minimum Black Elo

Stockfish evaluation ?

Exclude tournaments containing word (up to 6 words):

This wouldn't be possible without these open-source resouces Chessground, chess.js, Stockfish 18, TWIC, and the goat of open-sources: Lichess.
You can check out reasonings for the formulas and docs here.
Made with ♥

Changelog

2026-05-19 Massive UI/UX improvement. Facilitated usage by swapping API key with Lichess Login. Other fixes and features added like game export.
2026-05-18 Complete UI revamp. It wasn't clear what Novelty Hunter is for. Now it is: finding opening ideas. Added position and color filters and unburdened the user by not having to drop pgn.
2026-05-16 MASSIVE UPGRADE. Mariana had the brilliant idea to use concurrency in the API calls making a batch of 700 games go from taking 90 mins down to 3!
2026-04-18 Increased general rarity scores by 100%+ because they were too low.
Changed early nov function to (15 - x)/10 so that move 5 gets 1.0, move 10 gets 0.5 and move 15 gets 0.
Added option to filter out custom tournaments.
Removed novelties textbox.
2026-04-17 Fixed bug with efficiency score: with the old weights white was getting a max of 0.9 efficiency score. SF score now has full weight so max is 1.

Analyzing games...

Preparing...

Game 1 / 1 ↑↓

Start position ←→

Event

White

Black

Result

Rare Move

Frequency ?

Master Games Before

Master Games After

Rarity Score ?

Efficiency Score ?

Early Novelty Score ?

Final Interest Score ?