Mental Calculation World Cup
The Mental Calculation World Cup is the premier international calculation event. First organized by Ralf Laue in 2004, the Mental Calculation World Cup takes place every other year in Germany. The most recent iteration saw 35 calculators from 18 countries participate in ten different tasks over two days. The top-5 finishers were GMCA board members Aaryan Shukla and Samuel Engel, Japanese competitors Tetsuya Ono and Naoto Higa, and Lebanese competitor Mohammad El-Mir.
Other Organizations
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National Soroban Education Federation
Founded as the All Japan Soroban Education Federation in 1953, NSEF has soborban instructors based across fifty-two different chapters across Japan and holds the largest calculation competition in the world — the All Japan Soroban Championship
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Memoriad
Memoriad is a mind sport organization that has been conducting international, regional, and national competitions since 2007. Memoriad also provides free-to-download training software that can be used to practice mental calculation and memory.
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Mind Sport Olympiad
The Mind Sport Olympiad, operating since 1997, includes a mental calculation competition as part of its annual event. Currently, the MSO mental calculation event includes a varied task format and is conducted remotely. Announcements are made by Daniel Timms on his website.
