Logic Masters Deutschland e.V.

(Very) Hard AND nice puzzles

The following list contains portal puzzles that have been rated as nice or very nice and that are difficult. These puzzles are recommended for experts - and allow some time to solve.

DescriptionsolvedRating
unsolvedDoubles Hidden Inside Squares (Double Trouble)
by Mad-Tyas (on 8. September 2021, 13:28)
174
98 %
unsolvedThree Rights and a Wrogn
by SirWoezel (on 29. July 2022, 13:47)
184
95 %
unsolvedSmall Phistomefel
by Stoer (on 23. April 2023, 13:19)
224
91 %
unsolvedChackstones (XVXV/Kropki pairs/X-sums)
by dumediat (on 27. April 2024, 02:42)
374
92 %
unsolvedT-Time (Anti-Knight Renban Killer Sudoku)
by Phistomefel (on 13. June 2023, 21:12)
1924
97 %
unsolvedGlass Half Empty
by mellowrobinson (on 12. August 2025, 16:19)
354
96 %
unsolvedChaos Construction: Double Arrow
by Xendari (on 14. November 2023, 02:19)
814
96 %
unsolved4-Stern-Star-Battle
by CJK (on 1. July 2021, 10:09)
504
94 %
unsolvedOphidiophobia
by marty_sears (on 14. August 2024, 14:45)
1554
97 %
unsolvedThermos Construction
by Prof.Dori (on 15. December 2023, 02:00)
584
92 %
unsolvedGlass Half Summed (Chaos Construction)
by sfushidahardy (on 25. August 2024, 01:10)
684
98 %
unsolvedBuchstabenpaarreihen (4)
by BFaw (on 30. March 2016, 11:00)
364
97 %
unsolvedScratches
by PrimeWeasel (on 11. April 2021, 09:27)
134
95 %
unsolvedJapanese Sums with Arrows
by mathpesto (on 31. December 2021, 22:24)
394
95 %
unsolvedBlack Eyes
by Qodec (on 10. April 2022, 14:31)
294
95 %
unsolvedCapulet [Variant Sudoku]
by wisty (on 18. June 2022, 05:36)
464
95 %
unsolvedMountain Aven
by mormagli (on 2. October 2022, 04:37)
154
90 %
unsolvedPosition Sums Fillomino #3: Internal Clues
by ONeill (on 26. October 2022, 12:59)
274
100 %
unsolvedFriendly Indexers
by thoughtbyte (on 1. June 2023, 06:18)
124
91 %
unsolvedMomohime's Human Beatbox Party
by Morisenseiisgod (on 12. December 2023, 15:24)
134
98 %
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