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✏️ Pencil Puzzles

Pencil puzzle-solving (excluding sudoku) videos from CTC.

Data source: Cracking the Cryptic Catalogue · About: View on GitHub

10 rows where Constraints contains "O/E" sorted by Id descending

Type 4

  • Latin Square · 7
  • Fillomino · 1
  • Skyscrapers · 1
  • Suguru · 1

Solver 2

  • Simon · 8
  • Mark · 2

Setter 6

  • Marty Sears · 4
  • Math Pesto · 2
  • Justin Vitanza · 1
  • Michael Lefkowitz · 1
  • Peter Veenis · 1
  • Prasanna Seshadri · 1

Constraints 25

  • O/E · 10 ✖
  • Difference · 3
  • Ratio · 3
  • 7x7 · 2
  • Count · 2
  • Non-Repeat · 2
  • Pathway · 2
  • Repeat Digits · 2
  • Zipper Lines · 2
  • Anti-Knight · 1
  • Arrow · 1
  • Chaos Deconstruction · 1
  • Cipher · 1
  • Counting Sets · 1
  • Diagonal · 1
  • Equal Sums · 1
  • Fog · 1
  • Gaps · 1
  • Gattai · 1
  • German Whispers · 1
  • Killer · 1
  • Little Killer · 1
  • Polyominoes · 1
  • Star Battle · 1
  • Sums · 1
Id ▲ Puzzle Title Date Solver Type Setter Constraints Video Video Length Video Length (Minutes)
8534 RAT RUN: One Year Earlier 2026-05-06 Simon Latin Square Marty Sears Difference, Non-Repeat, O/E, Pathway, Ratio
Which Rat Is Best At Sudoku?! Rat Run: One Year Earlier
Which Rat Is Best At Sudoku?! Rat Run: One Year Earlier
01:20:57 81 min
8525 Something Stupid 2026-05-04 Simon Latin Square Marty Sears Fog, German Whispers, Non-Repeat, O/E, Ratio, Repeat Digits, Zipper Lines
Puzzle Expert Attempts Something Stupid...
Puzzle Expert Attempts Something Stupid...
01:01:02 62 min
8503 RAT RUN 36: Alternating Currant 2026-04-29 Simon Latin Square Marty Sears Difference, Equal Sums, O/E, Pathway, Ratio, Repeat Digits, Zipper Lines
Remember NOT To Do Sudoku!! Rat Run 36: Alternating Currant (S3:E16)
Remember NOT To Do Sudoku!! Rat Run 36: Alternating Currant (S3:E16)
01:29:14 90 min
8117 Inset 2026-02-02 Mark Latin Square Michael Lefkowitz Gattai, O/E, Sums
Think it Through!
Think it Through!
00:26:43 27 min
7476 Pro-Diagonal 2025-08-06 Simon Latin Square Justin Vitanza Anti-Knight, Counting Sets, Diagonal, O/E
How To Use A MAD Sudoku Technique
How To Use A MAD Sudoku Technique
00:59:51 60 min
6854 Connect 4 Draw 2025-02-06 Simon Latin Square Marty Sears 7x7, Count, Difference, O/E
Connect 4: SOLVED!
Connect 4: SOLVED!
00:49:44 50 min
6057 Happy Birthday Simon! 2024-06-08 Simon Latin Square Peter Veenis 7x7, Killer, Little Killer, O/E, Polyominoes
Would You Wish THIS Man A Happy Birthday?
Would You Wish THIS Man A Happy Birthday?
00:54:35 55 min
4867 Bridges and Fillings 2023-07-15 Simon Fillomino Math Pesto Count, O/E
The Naughty Brain
The Naughty Brain
00:52:01 53 min
2809 Suguru Chaos Deconstruction 2022-03-02 Mark Suguru Math Pesto Arrow, Chaos Deconstruction, O/E
Paranormal Sudoku Rules Apply
Paranormal Sudoku Rules Apply
00:46:34 47 min
1297 A Birthday Present 2020-07-21 Simon Skyscrapers Prasanna Seshadri Cipher, Gaps, O/E, Star Battle
A Birthday Present Puzzle
A Birthday Present Puzzle
00:37:30 38 min

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Last updated (UTC): 2026-05-09 06:04:52