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
unsolvedToil and Trouble (Collab with ThePedallingPianist)
by Scojo (on 30. May 2025, 22:45)
285
95 %
unsolvedBizarro-doku (w/ MathGuy_12)
by ThePedallingPianist (on 24. October 2025, 21:24)
365
95 %
unsolvedWichtel 2017 (8): Ein rätselhaftes Experiment
by wichtel (on 17. August 2018, 03:05)
385
100 %
unsolvedFillomenon
by DarthParadox (on 2. October 2023, 19:14)
1365
97 %
unsolvedDas Prinzip der Polarität
by tuace (on 3. September 2017, 17:16)
255
96 %
unsolvedA 38 III (toroidal)
by tuace (on 28. October 2017, 13:19)
255
99 %
unsolvedMiracle Clones [Tribute to Botaku]
by Undar_Beyond (on 10. November 2020, 20:34)
335
91 %
unsolvedJapanese Sums Cave Cipher - KNT
by ONeill (on 27. August 2024, 12:49)
295
99 %
unsolvedCavino Wisteria
by PrimeWeasel (on 9. November 2024, 09:48)
305
100 %
unsolvedChaos Construction: Summon
by Myxo (on 1. March 2026, 15:03)
285
100 %
unsolvedMissile Command
by Xenonetix (on 13. July 2022, 00:44)
385
96 %
unsolvedFriendly X-Sums (Chaos Construction)
by thoughtbyte (on 16. July 2022, 23:11)
435
99 %
unsolvedPoison Arrow
by FryTheGuy (on 23. April 2021, 20:14)
345
94 %
unsolvedArrow Forest
by PotatoHead21 (on 28. September 2021, 09:51)
165
91 %
unsolvedOne piece
by lerroyy (on 25. September 2022, 22:48)
285
98 %
unsolvedEternal Entropy
by Mad-Tyas (on 28. September 2022, 12:15)
365
91 %
unsolvedDoomsday Killer Sudoku
by bodemeister (on 19. October 2022, 15:50)
155
100 %
unsolvedNevermore Samurai
by Kafkapharnaum (on 4. April 2023, 21:27)
125
100 %
unsolvedPaper Snowflake (Irregular, Killer)
by Chefofdeath (on 28. May 2023, 04:46)
155
95 %
unsolvedSecret Kingdoms
by SenatorGronk (on 27. March 2024, 17:36)
295
98 %
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