Academics
Sweep League
Real Minesweeper played like a sport — every board is no-guess, and you are measured like the pros (3BV, clicks, efficiency, 3BV/s, shown only after you finish). The Probability Lens shows the EXACT chance each hidden square is a mine. Race a friend on the same board with a code, and check a run with a replay token that re-plays through the engine. No accounts, no leaderboard, bests on this device. Ages 9-14.
▶ Play it nowBuilt for sittings of about 20 minutes on the screen. That is our design budget, not a measurement.
Meet your mentor
Every Spark & Anvil app has a friendly mentor character that demonstrates, asks, and patiently scaffolds learning.
Mentored by Surefoot
#3B5B8C Characters who teach
Meet the cast
Sweep League's crew each embody one idea from the sport — the crew IS the method. Bevvy knows the fewest clicks a board could take (3BV), Clicksy counts every wasted click (efficiency), Oddsley weighs every arrangement the numbers allow (the Probability Lens), Chordy opens a whole ring of squares in one move, Floody lets a zero open its whole region, Knowsley knows no board needs a guess, Rewinda checks a run by re-playing it, Samesby gives racers the same board, Sumsy lets the total mine count shape the odds, and Tickwell keeps your speed hidden until you finish. Mentor Surefoot, a mountain goat, only steps where she is sure.
Surefoot
only steps where she is SURE; asks which square the numbers prove
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Bevvy
A bee who knows the fewest clicks a board could take - its 3BV
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Clicksy
A cricket who counts every wasted click - efficiency is 3BV divided by clicks
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Oddsley
An owl who weighs every arrangement the numbers allow - the exact odds of a mine
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Chordy
A crab who opens a whole ring of squares at once when a number's mines are all flagged
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Floody
A duck who knows a zero opens its whole empty region in one go
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Knowsley
A red panda who knows every board can be solved by knowing, never by guessing
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Rewinda
A squirrel who checks a run by re-playing every move, never by trusting it
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Samesby
A penguin who knows a race code gives both racers exactly the same board
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Sumsy
A hamster who knows the total number of mines shapes the odds of every hidden square
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Tickwell
A hare who knows your speed is shown only AFTER you finish, never while you play
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Browse all chapters → · What's distributed-narrative methodology? →
What's inside
Learning goal
Real Minesweeper played like a sport — every board is no-guess, and you are measured like the pros (3BV, clicks, efficiency, 3BV/s, shown only after you finish). The Probability Lens shows the EXACT chance each hidden square is a mine. Race a friend on the same board with a code, and check a run with a replay token that re-plays through the engine. No accounts, no leaderboard, bests on this device. Ages 9-14.
Mentored by Surefoot — no data leaves the device.
How Sweep League handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages