Puzzles
50 jigsaws of Nano: its history, how it works, where people use it, and a few from other coins. Free to play; your progress stays in this browser (sign in to keep it on every device).
pieces
1Genesis2015Late at night, the first RaiBlocks node starts on a desk.⏱ Timed challenge · 1¢
2The Faucet Era2015–17Solve a captcha, get a few coins: how the supply was given out.⏱ Timed challenge · 1¢
3The Block Lattice CityEvery account its own chain, and the bridges between them.⏱ Timed challenge · 1¢
4Representatives VoteWeight from the people, votes to a 67% quorum.⏱ Timed challenge · 1¢
5Rush HourOne lane waits at the toll; the other just goes.⏱ Timed challenge · 1¢
6133,248,297Every coin there will ever be, in one vault. No mining.⏱ Timed challenge · 1¢
7The Rename2018Moving day: RaiBlocks becomes Nano.⏱ Timed challenge · 1¢
8One SunflowerA transaction's energy, from a single flower.⏱ Timed challenge · 1¢
9A Node at HomeA quiet PC, a sleeping cat, the network running.⏱ Timed challenge · 1¢
10Ӿ Around the WorldPayments that arrive before the cup is set down.⏱ Timed challenge · 1¢
11The First Send2015Two computers, one coin on the cable, and both screens say yes.⏱ Timed challenge · 1¢
12The WhiteboardThe first sketch: one chain for each account, and a cold coffee.⏱ Timed challenge · 1¢
13The Last Faucet Day2017October 2017: the line closes, the last coins go, the tap comes off the wall.⏱ Timed challenge · 1¢
14The Empty VaultThe door is open and the shelves are bare. One person keeps their own key.⏱ Timed challenge · 1¢
15A New SymbolA painter changes the old letters and puts Ӿ and XNO on the glass.⏱ Timed challenge · 1¢
16The Spam StormA storm of paper blocks. The post office sorts them, and the lights stay on.⏱ Timed challenge · 1¢
17The First CoffeeA phone, a cup and a small cafe: somebody buys a real thing.⏱ Timed challenge · 1¢
18The MeetupLaptops, stickers and a cake with a Ӿ, from many places.⏱ Timed challenge · 1¢
19Send and ReceiveTwo chains meet: a send on one, a receive on the other.⏱ Timed challenge · 1¢
20Twenty-Four WordsTwenty-four plants, one gate, and the only key.⏱ Timed challenge · 1¢
21A Little WorkA small key for each letter: effort, not a fee.⏱ Timed challenge · 1¢
22The FrontierA light at the end of every chain: the newest block.⏱ Timed challenge · 1¢
23Before You BlinkA hummingbird, and the payment is already there.⏱ Timed challenge · 1¢
24The ScalesVotes pour onto a great scale until the needle passes 67%.⏱ Timed challenge · 1¢
25PruningA gardener trims an old hedge of blocks. The balance stays.⏱ Timed challenge · 1¢
26The MailboxCoins wait in the box, until the owner opens the door.⏱ Timed challenge · 1¢
27A New RepresentativeThe weight moves to a new clerk. The coins stay home.⏱ Timed challenge · 1¢
28The New NodeA new library, filled shelf by shelf from next door.⏱ Timed challenge · 1¢
29The Tip JarAn open case, and coins of light that land whole.⏱ Timed challenge · 1¢
30A Letter HomeAcross the water, and home before the kettle boils.⏱ Timed challenge · 1¢
31One CentOne cent for a gumball, and all of it for the one who filled the machine.⏱ Timed challenge · 1¢
32Market DayFruit, a hand-painted Ӿ, and a line of customers. No card machine.⏱ Timed challenge · 1¢
33Machines That PayOne robot buys a sentence from another. Tiny coins ride the wire.⏱ Timed challenge · 1¢
34One ArticleOne story behind a ribbon: one coin unties it, and the writer smiles.⏱ Timed challenge · 1¢
35Pocket MoneyA piggy bank with a screen, and a grandmother far away who sends a coin.⏱ Timed challenge · 1¢
36The WellMany small gifts paid for it, and every drop of every gift arrived.⏱ Timed challenge · 1¢
37Wind and SmokeTwo hills: one quiet turbine with one small box, and a field of chimneys.⏱ Timed challenge · 1¢
38The Greenhouse NodeA tiny computer among the tomato plants, and one solar panel over it.⏱ Timed challenge · 1¢
39One LightbulbA node on the kitchen table under one lit bulb. No mining: a small machine is enough.⏱ Timed challenge · 1¢
40The ArcadeThe neon boulevard at night: pinball, air hockey and the lift of glowing balls.⏱ Timed challenge · 1¢
41Penny's CounterTickets in, toys out: Penny and three shelves of every prize.⏱ Timed challenge · 1¢
42The WallEach tile is one person's mark. One tile is still empty, with a light on it.⏱ Timed challenge · 1¢
43Account CityEvery block a building: green for money in, orange for money out.⏱ Timed challenge · 1¢
44The ClawOne prize in the hooks, a box of colored balls, a face at the glass.⏱ Timed challenge · 1¢
45The Times, 3 January 20092009A newspaper beside a humming computer: Bitcoin's first block has this headline in it.⏱ Timed challenge · 1¢
46Two Pizzas201022 May 2010: two warm boxes on the mat, and 10,000 bitcoin on the receipt.⏱ Timed challenge · 1¢
47The Mining FarmRows of machines, fans and cables: how Bitcoin does its work.⏱ Timed challenge · 1¢
48The Merge2022Two lines become one, and the smokestack comes off the engine.⏱ Timed challenge · 1¢
49The Cat Traffic JamEverybody wants a cat, there is one road, and every toll is higher.⏱ Timed challenge · 1¢
50Not Your KeysA safe, a paper of words, and a second copy far away.⏱ Timed challenge · 1¢