Master chess through legendary games by replaying iconic positions and testing your calculation against the engine
A merge game with real physics where you combine balls to create gold
Stage
Startup
Startup
Founded
2026
2026
Based in
Not given
BG
Pricing model
Freemium
Not given
Pricing
Player plan: $4.99 per month or $50 per year. Yearly billing saves 16% and works out to $4.17 a month. Includes unlimited positions, record and export, 1080p quality, and basic AI analysis. 30-day money-back guarantee.
Not given
Key features
Replay iconic chess positions from legendary games
Test calculation against AI engine
Challenge friends with shareable links
Compare continuation against best engine line
Game recording and export
Basic AI analysis
1080p quality output
Play against engine from any position
Curated library of historic positions
Free position challenges without account
Real physics: balls fall with true weight and settle naturally into a glass jar
Eleven ball sizes from Moonstone to Aurum, with five falling and six created by merging
Six original musical pieces where every merge plays a note on beat
Progress tracking with sixty-four stars across four skies
Twenty-two visual sets that transform balls, jar, background and sound
Four game modes: sixty-four stages, Endless, daily challenge, and Zen
Friend codes and competitive weekly tournaments with medals
No ads and no ad SDK; purchases only affect appearance, never gameplay
What makes it different
Play from the exact moment of legendary games, not just study them
Designed for pausing chess videos to calculate positions
Step into the shoes of chess legends at critical game moments
Compare your moves directly against engine analysis
Built by an indie hacker solving a personal chess problem
Real physics engine where balls fall and settle naturally instead of snapping
Music integrated into gameplay: every merge plays a note that lands on the beat
No advertisements and no ad SDK in the entire build
Purchases only change appearance and sound, never game balance or outcomes
Permanent progression: every stage completion lights a star forever in the sky
ReplayChess
AURUM