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ReplayChess
ReplayChess — Play the critical position of a famous chess game against a friend, a rated opponent or Stockfish, then see where you left the grandmaster's line.
About ReplayChess
ReplayChess is a free, open-source chess platform where chess history is something you play rather than watch.
Every chess fan knows the moment: the video pauses at the critical position, you find the winning move, and then the narrator plays it for you. ReplayChess is the other half of that experience. Pick one of 50+ legends, from Morphy and Capablanca to Kasparov and Carlsen, choose a famous game and start from its decisive position. Play it out for real against a friend through a private invite link, a rating-matched opponent with live clocks, or Stockfish running as WebAssembly in your browser at four strengths. When the game ends you get a match rate against the original moves, a marker at the first move where you diverged, and a practice mode to retry the position.
There is also an ECO-coded encyclopedia of 3,600+ openings, each playable from its resulting position, plus tournaments where a group plays the same positions and compares results.
Free to play with no ads; a Player plan at $4.99/month unlocks the full catalogue. MIT-licensed on GitHub (replay-chess/chess-battle-turbo), built with Next.js 15, React 19, Prisma, Socket.IO and Stockfish WASM; installs as a PWA.
- Who it is for
- Club and online chess players (800-2000) who follow chess history channels, coaches who want to hand a student a specific position, and Next.js developers.
- Problem it solves
- Chess videos pause at the critical position, you find the winning move, and then the narrator plays the rest for you. You never practise converting the position against an opponent who is trying to stop you, and opening study stays a memorised move list.
- The solution
- Every famous position (50+ legends) and every one of 3,600+ ECO openings is playable from its critical/resulting position against a friend, a rating-matched opponent with live clocks, or Stockfish in the browser at four strengths. Afterwards you get a match rate against the original moves and the exact move where you diverged, plus a practice mode.
- What makes it unique
- It is free, ad-free and MIT-licensed (Next.js 15, React 19, Prisma, Socket.IO, Stockfish WASM), and it starts you inside the moment rather than at move one - the divergence report against the grandmaster's line is the core loop, not an add-on.
Starting price: $4.99 / month
View current pricingFeatures
Play as a legend
Start from the decisive position of a famous game by one of 50+ legends and play it out for real.
Details
- Platforms
- Web
- Pricing
- Freemium
- Subscription
- Open source
- Built for
Club and online chess players (800-2000) who follow chess history channels, coaches who want to hand a student a specific position, and Next.js developers.
- Building since
2025
ReplayChess screenshot on IndieTools
1 / 2Website performance
Recorded mobile lab measurements and finalized weekly standings from IndieTools Speed.
69GoodMobile Lighthouse
Measured · UTC
- Load time
- 5.41 s
- FCP
- 912 ms
- LCP
- 11.69 s
- CLS
- 0.002
- TTFB
- 2 ms
- TBT
- 218 ms
- Speed index
- 4.57 s
These stored lab observations describe controlled test runs. They are not real-user Core Web Vitals or a guarantee of search rankings. Weekly standings below remain attached to their finalized edition.
- Overall rank · 2026-W43
- #830
- Down 80 places
- Best overall rank
- #750
- 0 top 10 finishes
- Best category rank
- #18
- 0 category wins
- Latest change
- -2 score
- Best score 69 / 100
Method: psi-mobile-two-sample-mean-v1 · 2 samples per reading. Only readings with the same recorded method and sample count share a chart. Lab results can vary between runs.
Website performance history
Inspect every successful mobile Lighthouse lab measurement by metric and date range.
Range
Metric
Latest score
69 / 100
Higher is better
35 measurements
Use the left and right arrow keys to inspect measurements. Use Home or End to jump to the first or last measurement. Press Escape to dismiss the chart tooltip.
Oct 1, 2026Oct 31, 2026Weekly rank history
Track the product's finalized overall position on the IndieTools Speed leaderboard.
Range
MetricOverall rank
Latest rank
#830
Closer to #1 is better
2 weeks
Use the left and right arrow keys to inspect weeks. Use Home or End to jump to the first or last week. Press Escape to dismiss the chart tooltip.
Oct 12, 2026Oct 19, 2026Related products
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