Logic Masters Deutschland e.V.

The Puzzle Portal

Please note: The creation and use of multiple accounts is not desired in the Portal. (Exceptions are only permitted for technical reasons or with the consent of the association Logic Masters Deutschland.) We reserve the right to block users who violate this rule.

The puzzle portal is a collection of puzzles created by puzzle enthusiasts from all over the world. At the moment the portal contains 31565 puzzles.

If this is your first visit to the puzzle portal we recommend that you take a tour to get an overview of the portal contents.

We have put together a collection of puzzles suitable for beginners. These contain solution hints - and we hope that these puzzles will help you getting started.

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To help you getting started navigating the portal we have put together some puzzle collections.

Puzzle types	Puzzle collections	Puzzle authors
Sudoku	Easy and nice	Richard
Slither link	Average and nice	Luigi
ABC-tje	Difficult and nice	berni
Pentomino puzzles	Often solved and nice
Mystery puzzles

10-in-9 (Variant) 159 (Variant) A 38 ABC Box ABCtje Achtelwenden Akari Anglers Anti-Diagonal (Variant) Anti-Factor Lines (Variant) Anti-Knight (Variant) Anti-Queen (Variant) Aquarium Arrows Arrows (Variant) Battenburg (Variant) Battlefield (Variant) Battleships Between (Variant) Binairo (Variant) Brick Wall Broken 159 (Variant) Candles Capsules Carpet (Variant) Castle Wall Cave Chaos Construction (Variant) Clone (Variant) Compass Compass (Variant) Congruence Loop Consecutive (Variant) Consecutive Pairs (Variant) Coral Country Road Cross the Streams Crossword Puzzle Diagonal (Variant) Difference (Variant) Disjoint Groups (Variant) Distance (Variant) Dominion Domino Search Dots (Theme) Double Trouble (Variant) Earthquake (Variant) Easy as ABC Entropy (Theme) Equality Even/Odd (Variant) Extra Regions (Variant) Fibonacci (Theme) Fillomino Fortress (Variant) Friendly (Variant) Galaxies Geradeweg German Whispers (Variant) Greater Than (Variant) Hakyuu Hashiwokakero Heyawake Hitori Irregular (Variant) Japanese Sums Kakuro Killer (Variant) Knight Move (Theme) Kropki Kropki Pairs (Variant) Kuromasu Kurotto Landvermessung Laser Letter Puzzle Lighthouses LITS Little Killer (Variant) Lockout Lines (Variant) Logical Magic Labyrinth Magic Square Magnets Masterword Masyu Mathrax Maximum (Variant) Mid-loop Minesweeper MinMax (Variant) Modifier Cells (Variant) Moon-or-Sun Myopia Nanro Neighbours Non-Consecutive (Variant) Non-Touching (Variant) Nonogram Norinori Number Link Nurikabe Nurimisaki Outside (Variant) Palindrome (Variant) Parity (Theme) Parity Party (Variant) Pathway (Variant) Pentominous Pentopia Position Sums (Variant) Primes (Theme) Product (Theme) Products Pyramid Quadruple (Variant) Quattroquadri (Variant) Railroads Ratio (Variant) Ratio Pairs (Variant) Region Sum Lines (Variant) Regional Sums Remote (Variant) Renban (Variant) Roller Coaster Roman Numerals (Variant) Roman Sums Rossini (Variant) Samurai (Variant) Sandwich (Variant) Sashigane Shakashaka Shikaku Shimaguni Skyscraper Clusters Skyscrapers Slingshot (Variant) Slitherlink Smashed Sums Snake Snake (Variant) Star Battle Sudoku Suguru Tapa Taxicab (Variant) Tents Thermo (Variant) Thermometers Umbrellas Underground Urnenrätsel Variables Tapasyu Windoku (Variant) X-Sums (Variant) XV (Variant) XV Pairs (Variant) XY-Differences (Variant) Yajilin Yin and Yang

Enjoy browsing the portal!

If you are interested in the recent growth of new puzzles, see the discussion in our forum (scroll down to see comments in English).

The easiest puzzles

	Description	solved	Rating
	Quaver by Mr Toffee (on 11. December 2025, 00:01)	197	72 %
	Day 1: Arrows by SharpFox (on 1. December 2025, 06:00)	345	78 %
	Rose Puzzle 1 by RailMan (on 13. June 2025, 15:45)	652	79 %
	Quad V 4x4 by iceypop3444 (on 10. August 2025, 03:28)	427	73 %
	Look At What You're Saying by PhoenixAki (on 9. April 2025, 10:04)	682	77 %

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The most beautiful puzzles

	Description	solved	Rating
	Wichtel 2016 (2): Erfahrener Höhlenforscher gesucht by wichtel (on 20. April 2017, 11:02)	52	100 %
	Die Kryptos - S02E06: Summenbild Rundweg / Sudoku by tuace (on 16. March 2018, 15:10)	41	100 %
	Japanische Höhle mit Irrwisch von den Außerirdischen (2) by ibag (on 20. April 2018, 00:00)	40	100 %
	Glückwünsche vom Orion by Statistica (on 9. July 2019, 00:55)	25	100 %
	Adventskalender 2020, Finale - Riesenrundweg by Zzzyxas (on 1. December 2020, 07:00)	27	100 %

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The newest puzzles

	Description	solved	Rating
	Windmill by Kaktuslav (today, 08:00)	0	N/A
	Partition Pary by Wuschel (today, 07:42)	0	N/A
	Entropic Wheel by cygne (today, 07:09)	1	N/A
	Space Invaders by juggler (today, 06:01)	3	N/A
	Sudoku Variants Series (454) - Little Thermometers by Richard (today, 06:00)	3	N/A

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Latest

New comments	Last solved
Perfect Powers (Snakdoku) (today, 08:54 by hyea) The rule is not easy to understand and contains implicit assumption. Ninelives [X-Sums Chaos Construction] (today, 08:39 by StephenR) Great puzzle, thanks, but yes very hard and the sort of puzzle where I get very... Frak Redux (Ten Lines) (today, 08:33 by Piatato) Awesome! RAT RUN 19: Brainwaves (today, 08:06 by 26rfeng) My favorite so far! I wish there was a level above very nice. Super fun :o average difficulty HAPPY NEW YEAR! (today, 08:03 by fogpictures) @TheJRMY: the pink dot has to be odd. But it is just decorative since you don't... A foggy knight (today, 07:59 by DarthSillious72) Yeah, this definitely isn’t my best puzzle. I’ve made quite a few others... V dot X - variant sudoku (today, 07:41 by superkinkel) Sounds like a nice set of constraints, but the puzzle is missing. Space Invaders (today, 07:33 by LJ Jamie) That solution code is gnarly, but this was a super cool puzzle! The puzzle was... A foggy knight (today, 07:18 by ragmat12) Great puzzle, easy to get through once you understand the negative constraint.... Anomalous Cells (today, 07:15 by Zack Szekely) The amount of brainpower needed to solve this puzzle is stupendous! The solve...	today, 09:02 Easy Sums by ElecCatMon today, 09:00 Day 4: Renban lines by ElecCatMon today, 09:00 Winter Wonderland (A Christmas Sudoku) by ElecCatMon today, 08:59 Squonk by MaxSmartable today, 08:59 Perfect Powers (Snakdoku) by hyea today, 08:59 Money for old rope by milxqueen today, 08:57 The Quatro by ElecCatMon today, 08:55 Midnight snack by ElecCatMon today, 08:55 Yours Truly by randall today, 08:55 Fog One by ElecCatMon
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