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Cairo Pentagonal Kurotto
Here is an adaptation of Nikoli’s Kurotto to a Cairo Pentagonal grid. Rules Standard Kurotto Rules. Shade some cells such that: Each circled number equals the total number of cells in all...
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Killer Sudoku Hybrids
Over these last few weeks I’ve returned to my roots with a few Killer Sudoku variants, which I recently posted to the Daily League on Facebook. I have a few more ideas, but they’ll have to wait until...
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Rhombile Transparent Tapa Loop
Here is a transparent variation of Tapa-Loop by Serkan Yürekli adapted to a Rhombile grid. Some puzzles of this type crafted by Serkan and Fatih Kamer Anda will be featured on the upcoming Tapa...
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Kropki Switch
This may be the most obscure puzzle idea I’ve come up with yet. Even though it’s hard to explain, I like how it solves. Rules Place the numbers 1-9 so that they appear exactly once in each 3×3 block...
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Sum Star
Here’s a type that came together in my notebooks back in October 2016. It’s nearest rectangular precedent is Gapped Kakuro by Serkan Yürekli. A puzzle of this type will be featured today on...
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Sudoku embedded in a Kakuro
Rules In addition to standard Kakuro rules, the grey shaded cells must form a valid Sudoku solution The puzzle below has been corrected. See here for a highlight of the correction. Puzzle The puzzle...
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Karst
Rules Variant of Cave: Draw a single loop along the dashed lines that encloses some cells. Edges of this loop may not cross or share a vertex. Numbers indicate the number of connected cells from all...
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Hexagonal Kurokuron
Kurokuron (クロクロ一ン: “black clone”), is a shading puzzle that first appeared in Puzzle Communication Nikoli issues 153-155. Identical rules apply to a hexagonal grid. Rules Shade some cells such that:...
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Omni-Yajilin
My first Nikoli puzzle book was Pencil Puzzle Yajilin 1, back in 2006 when the Pencil Puzzle series was available. Yajilin has always been a special puzzle type for me. It marks the beginning of that...
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Kaleidoscope 2018
The Kaleidoscope competition is returning to Logic Masters India this weekend! It will feature 14 new puzzles from the past 7 Kaleidoscope types, and will take place from 10/19 to 10/22, starting in a...
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