ISKL 2019 Round 4 - Part 1 : 22nd to 25th Nov

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Click here if you planning to solve online.


Instructions Booklet
Sudoku Booklet (7 pages)
(Please save the pdf into your computer and print using Acrobat reader to avoid potential printing issues. Read this post for details.)

About ISKL

Read more about ISKL here.

Bonus points

Bonus 2 points will be awarded per minute (computed upto seconds) if all sudokus are submitted correctly before 60 minutes.


You may start "ISKL 2019 Round 4 - Part 1" any time during the weekend of 22nd to 25th Nov.

Your timer will start when you click "Start ISKL 2019 Round 4 - Part 1" — then you will have 60 minutes to solve and submit your answers.

A timer will be shown the answer page with the remaining time.


If you have any questions or doubts or suggestions, please ask in the forum.

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