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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
newSudoku Variants Series (484) - Next to N
by Richard (today, 06:00)
173
96 %
unsolvedSudoku Variants Series (483) - Coral
by Richard (on 4. September 2026, 06:00)
732
98 %
unsolvedSudoku Variants Series (482) - Overlapping Matryoshka
by Richard (on 28. August 2026, 06:00)
254
87 %
unsolvedSudoku Variants Series (481) - Counting Circles
by Richard (on 21. August 2026, 06:00)
1032
95 %
unsolvedSudoku Variants Series (480) - Dutch Whisper Sums
by Richard (on 14. August 2026, 06:00)
603
98 %
unsolvedSudoku Variants Series (479) - Parity lines
by Richard (on 7. August 2026, 06:00)
1131
87 %
unsolvedSudoku Variants Series (478) - Wall
by Richard (on 31. July 2026, 06:00)
823
98 %
unsolvedSudoku Variants Series (477) - Product-sum-lines
by Richard (on 24. July 2026, 06:00)
633
96 %
unsolvedSudoku Variants Series (476) - Golden cells
by Richard (on 17. July 2026, 06:00)
1282
89 %
unsolvedSudoku Variants Series (475) - N-Sums - skyscrapers
by Richard (on 10. July 2026, 06:00)
783
98 %
unsolvedSudoku Variants Series (474) - First seen odd/even
by Richard (on 3. July 2026, 06:00)
983
95 %
unsolvedSudoku Variants Series (473) - Even X-Sums
by Richard (on 26. June 2026, 06:00)
1172
96 %
unsolvedSudoku Variants Series (472) - Magic Japanese summer
by Richard (on 19. June 2026, 06:00)
1343
98 %
unsolvedSudoku Variants Series (471) - Lunchbox
by Richard (on 12. June 2026, 06:00)
993
95 %
unsolvedSudoku Variants Series (470) - Harmonious Thermos
by Richard (on 5. June 2026, 06:00)
1882
95 %
unsolvedSudoku Variants Series (469) - Stardust
by Richard (on 29. May 2026, 06:00)
922
93 %
unsolvedSudoku Variants Series (468) - Opparity arrows
by Richard (on 22. May 2026, 06:00)
1093
94 %
unsolvedSudoku Variants Series (467) - Second start skyscrapers
by Richard (on 15. May 2026, 06:00)
1192
98 %
unsolvedSudoku Variants Series (466) - Parity swap arrows
by Richard (on 8. May 2026, 06:00)
2092
96 %
unsolvedSudoku Variants Series (465) - Productive Killers
by Richard (on 1. May 2026, 06:00)
564
92 %
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