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Richard

Richard is one of the most productive authors in the puzzle portal. His specialty are Sudoku variants and ABCtjes, but he also likes using Pentominoes in his puzzles. Richards puzzles are very popular: almost all of his puzzles are rated above 80%, and they cover the whole difficulty range. Enjoy Richard's puzzle creations!

DescriptionsolvedRating
unsolvedSudoku Variants Series (427) - Nonodoku
by Richard (on 6. June 2025, 08:00)
843
96 %
unsolvedSudoku Variants Series (426) - Zipper Lines
by Richard (on 30. May 2025, 08:00)
923
93 %
unsolvedSudoku Variants Series (425) - Up to N
by Richard (on 23. May 2025, 12:00)
632
91 %
unsolvedSudoku Variants Series (424) - Oil and Water
by Richard (on 16. May 2025, 12:00)
1482
95 %
unsolvedSudoku Variants Series (423) - Nine Rooms
by Richard (on 9. May 2025, 12:00)
653
95 %
unsolvedSudoku Variants Series (422) - Irregular Dots
by Richard (on 2. May 2025, 12:00)
1101
88 %
unsolvedSudoku Variants Series (421) - Shifter Dots
by Richard (on 25. April 2025, 12:00)
832
90 %
unsolvedSudoku Variants Series (420) - Entropic Lines
by Richard (on 18. April 2025, 12:00)
1192
95 %
unsolvedSudoku Variants Series (419) - Dutch Whisper Lines
by Richard (on 11. April 2025, 12:00)
932
94 %
unsolvedSudoku Variants Series (418) - Sum and Product Killer
by Richard (on 4. April 2025, 12:00)
674
96 %
unsolvedDutch Quali 25 appetizer (3) - Sudoku Sandwich
by Richard (on 3. April 2025, 06:00)
762
94 %
unsolvedSudoku Variants Series (417) - Sum or Product Killer
by Richard (on 28. March 2025, 12:00)
813
93 %
unsolvedDutch Quali 25 appetizer (2) - Sudoku Outside
by Richard (on 28. March 2025, 06:00)
752
92 %
unsolvedDutch Quali 25 appetizer (1) - Sudoku Ascending starters
by Richard (on 26. March 2025, 06:10)
503
93 %
unsolvedSudoku Variants Series (416) - Product Killer
by Richard (on 21. March 2025, 12:00)
1002
92 %
unsolvedSudoku Variants Series (415) - Parity Poopers
by Richard (on 14. March 2025, 12:00)
644
96 %
unsolvedSudoku Variants Series (414) - Derivative Arrows
by Richard (on 7. March 2025, 12:00)
623
95 %
unsolvedSudoku Variants Series (413) - Cloned Inequality
by Richard (on 28. February 2025, 12:00)
663
92 %
unsolvedSudoku Variants Series (412) - Dutch Flat Mates
by Richard (on 21. February 2025, 12:00)
1372
90 %
unsolvedSudoku Variants Series (411) - Position Sandwich
by Richard (on 14. February 2025, 12:00)
822
96 %
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