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9 Pins Puzzle

Picture
This fun little puzzle (found at "Puzzling Place", Keswick) is a variant on the famous 8 queens problem, with some of the squares (pin holes) blocked out. All you have to do is place 9  pins on the board so that no two pins lie on the same row, column or diagonal.

Here's the web app version I made.
Mobile friendly version here.
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  • Home
  • GCSE
    • Number >
      • Arithmetic
    • Algebra >
      • Equations
      • Graphs
      • Patterns and Sequences
    • Geometry and Measure
  • Contact
  • Notes
    • registers
    • A-Level 16-18 >
      • Pure Maths >
        • Surds and Indices
        • Equations of Lines
        • Quadratics
        • Polynomials
        • Binomial Expansions
        • Trigonometry
        • Differentiation
        • Summations
        • Curve Sketching
        • Matrices
        • Sequences
    • ISC Accounting
    • ISC Pure 3
    • ISC Core Maths
    • PMP Math
    • PRS
    • ISC PURE 2
    • MCR
    • ARM main
  • Projects
    • Excel Projects >
      • Enigma
      • Lorenz SZ40
      • GOL
      • 9 Pins
      • AUTM
    • WebApps