Largest multi-sudoku puzzle

According to Official Guinness Records,

The largest multi-sudoku puzzle consists of 280 sudoku grids and was achieved by Timeintermedia, Inc., Sugakubunka Co., Ltd., Wakara Co., Ltd. and Dwango Co., Ltd. (all Japan) in Chofu, Tokyo, Japan, on 7 October 2018.The attempt was taken place as a part of a math event called MATH POWER since 2016.

For a complete list of 2018 records, please visit 2018 Guinness Records in Japan.

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