Master chess through legendary games by replaying iconic positions and testing your calculation against the engine
A free browser life simulator where you are born randomly and live one life to its end
Stage
Startup
Not given
Founded
2026
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Based in
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Pricing model
Freemium
Free
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.
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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
Play 172 countries with real birth statistics
Life decisions affect outcomes
Realistic mortality and life expectancy data
Gameplay from age 0 to death
Optional text-to-speech narration
Share life summaries and life cards
Play at variable speed or pause
Auto mode to watch without deciding
10 languages including Chinese, Japanese and Vietnamese
Local browser storage, no cloud account required
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
Built on real UN and World Bank data, not randomization
Independent edition separate from the original 1in8b.life project
Covers inequality, illness and mortality at real rates
ReplayChess
1 in 8 Billion