

Abaku Sets World Record as Longest-Running Online Multiplayer Arithmetic Game With a Shared Game State
The Czech educational game has remained publicly available online since May 18, 2009, surviving multiple platforms and generations of web technology while preserving its distinctive shared mathematical playing field. By Atlas Editorial Team 3 September 2026 • Prague [Czech Republic] More than two decades ago, Czech educator Vladimír Tesař began experimenting with a simple idea: what if people could learn to “read” numbers the way they read words? He would see a number such
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