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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 (437) - X-Sums or X-Products
by Richard (on 15. August 2025, 06:00)
893
95 %
unsolvedSudoku Variants Series (436) - X-Products
by Richard (on 8. August 2025, 08:00)
882
93 %
unsolvedSVS #435 Leftover: Slow Thermos
by Richard (on 1. August 2025, 08:00)
713
89 %
unsolvedSudoku Variants Series (435) - Slow Thermos
by Richard (on 1. August 2025, 04:29)
1222
95 %
unsolvedSudoku Variants Series (434) - Diagonal Sandwich
by Richard (on 25. July 2025, 08:00)
1012
95 %
unsolvedSudoku Variants Series (433) - Zifference Lines
by Richard (on 18. July 2025, 08:00)
992
94 %
unsolvedSudoku Variants Series (432) - Pointing Arrows
by Richard (on 11. July 2025, 08:00)
1762
96 %
unsolvedSudoku Variants Series (431) - Split Pea Lines
by Richard (on 4. July 2025, 08:00)
773
94 %
unsolvedSudoku Variants Series (430) - Sandwiched N-Sums
by Richard (on 27. June 2025, 08:00)
1132
94 %
unsolvedSudoku Variants Series (429) - German Whisper Dots
by Richard (on 20. June 2025, 08:00)
2112
96 %
unsolvedSudoku Variants Series (428) - Eight Lines
by Richard (on 13. June 2025, 08:00)
803
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)
1772
96 %
unsolvedSudoku Variants Series (423) - Nine Rooms
by Richard (on 9. May 2025, 12:00)
813
95 %
unsolvedSudoku Variants Series (422) - Irregular Dots
by Richard (on 2. May 2025, 12:00)
1321
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)
1412
96 %
unsolvedSudoku Variants Series (419) - Dutch Whisper Lines
by Richard (on 11. April 2025, 12:00)
1082
94 %
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