Padlock

A numeric take on code-breaking: the hidden combination has four digits and must be found within five attempts. After each guess, colours show which digits are in the correct position and which belong elsewhere, including repeated digits. Harder variants use five-digit codes or allow up to ten guesses, and a highlighting tool helps track candidates.

Category

Logic, Math

How you play

Deduction

Languages

Any (no reading needed)

Daily puzzle

Yes

Made by

Fun Thinking Limited

• 7.9
  Pips

  Place dominoes to satisfy region conditions
  Play
• 7.3
  Sudoku.com

  Solve sudoku grids from easy to expert
  Play
• 7.2
  Sudoku

  Fill a 9x9 grid so no digit repeats
  Play
• 7.0
  Mini Sudoku

  Fill a 6x6 grid with digits 1 to 6
  Play
• 6.8C
  Cracked Sudoku

  Solve a Sudoku variant drawn without a grid
  Play
• 6.7
  One Up Puzzle

  Fill a walled grid with numbered sequences
  Play
• 6.6
  Buzzled

  Colour hexagons so each row hits its target sum
  Play
• 6.6
  Fivefold

  Fill a number grid under rules that change daily
  Play