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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 (428) - Eight Lines
by Richard (on 13. June 2025, 08:00)
793
95 %
unsolvedSudoku Variants Series (427) - Nonodoku
by Richard (on 6. June 2025, 08:00)
983
96 %
unsolvedSudoku Variants Series (426) - Zipper Lines
by Richard (on 30. May 2025, 08:00)
1053
92 %
unsolvedSudoku Variants Series (425) - Up to N
by Richard (on 23. May 2025, 12:00)
832
92 %
unsolvedSudoku Variants Series (424) - Oil and Water
by Richard (on 16. May 2025, 12:00)
1742
96 %
unsolvedSudoku Variants Series (423) - Nine Rooms
by Richard (on 9. May 2025, 12:00)
803
95 %
unsolvedSudoku Variants Series (422) - Irregular Dots
by Richard (on 2. May 2025, 12:00)
1291
88 %
unsolvedSudoku Variants Series (421) - Shifter Dots
by Richard (on 25. April 2025, 12:00)
972
89 %
unsolvedSudoku Variants Series (420) - Entropic Lines
by Richard (on 18. April 2025, 12:00)
1392
96 %
unsolvedSudoku Variants Series (419) - Dutch Whisper Lines
by Richard (on 11. April 2025, 12:00)
1082
94 %
unsolvedSudoku Variants Series (418) - Sum and Product Killer
by Richard (on 4. April 2025, 12:00)
864
96 %
unsolvedDutch Quali 25 appetizer (3) - Sudoku Sandwich
by Richard (on 3. April 2025, 06:00)
912
93 %
unsolvedSudoku Variants Series (417) - Sum or Product Killer
by Richard (on 28. March 2025, 12:00)
933
93 %
unsolvedDutch Quali 25 appetizer (2) - Sudoku Outside
by Richard (on 28. March 2025, 06:00)
902
93 %
unsolvedDutch Quali 25 appetizer (1) - Sudoku Ascending starters
by Richard (on 26. March 2025, 06:10)
603
94 %
unsolvedSudoku Variants Series (416) - Product Killer
by Richard (on 21. March 2025, 12:00)
1142
92 %
unsolvedSudoku Variants Series (415) - Parity Poopers
by Richard (on 14. March 2025, 12:00)
754
96 %
unsolvedSudoku Variants Series (414) - Derivative Arrows
by Richard (on 7. March 2025, 12:00)
753
95 %
unsolvedSudoku Variants Series (413) - Cloned Inequality
by Richard (on 28. February 2025, 12:00)
773
93 %
unsolvedSudoku Variants Series (412) - Dutch Flat Mates
by Richard (on 21. February 2025, 12:00)
1562
90 %
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