mscroggs.co.uk
mscroggs.co.uk

subscribe

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.
For Day 23: "so that every 9×9 block of squares in the grid contains" perhaps should read "so that every 3×3 block of 9 squares in the grid contains"
Dr. Matrix
on /blog/111
   ×1            
@Dr. Matrix: Thanks, I've corrected it
Matthew
on /blog/111
               

Archive

Show me a random blog post
 2026 

May 2026

World Cup stickers 2026

Apr 2026

A new puzzle every day
Mixing Wordle with other games

Feb 2026

Christmas (2025) is over
 2025 

Dec 2025

Christmas card 2025

Nov 2025

Christmas (2025) is coming!

Sep 2025

The partridge puzzle

Aug 2025

TMiP 2025 puzzle hunt

Jun 2025

A nonogram alphabet

Mar 2025

How to write a crossnumber

Jan 2025

Christmas (2024) is over
Friendly squares
 2024 

Dec 2024

A regular expression Christmas puzzle
Christmas card 2024

Nov 2024

Christmas (2024) is coming!

Feb 2024

Zines, pt. 2

Jan 2024

Christmas (2023) is over
 2023 
▼ show ▼
 2022 
▼ show ▼
 2021 
▼ show ▼
 2020 
▼ show ▼
 2019 
▼ show ▼
 2018 
▼ show ▼
 2017 
▼ show ▼
 2016 
▼ show ▼
 2015 
▼ show ▼
 2014 
▼ show ▼
 2013 
▼ show ▼
 2012 
▼ show ▼

Tags

pascal's triangle pi news mean coins christmas standard deviation chebyshev accuracy pac-man crosswords bempp christmas card electromagnetic field football numbers big internet math-off runge's phenomenon inverse matrices warwick quadrilaterals exponential growth nine men's morris palindromes gerry anderson light phd sobolev spaces coventry martin gardner preconditioning bubble bobble mathsteroids advent calendar arithmetic recursion oeis propositional calculus approximation frobel map projections fonts matrices bluesky flexagons trigonometry plastic ratio estimation squares regular expressions video games talking maths in public gather town wordle turtles gaussian elimination matrix of minors manchester wool countdown live stream cross stitch dates london underground php determinants hats kings anscombe's quartet datasaurus dozen dinosaurs sound kenilworth radio 4 nonograms binary sport world cup game of life asteroids mathslogicbot crossnumber chalkdust magazine computational complexity game show probability curvature tetris tmip captain scarlet rust harriss spiral royal baby correlation thirteen programming geometry menace crochet reddit machine learning cambridge pokémon bots fractals platonic solids databet folding paper edinburgh national lottery logic mathsjam statistics pythagoras the aperiodical fence posts probability raspberry pi convergence error bars logs guest posts dataset tennis alphabets hexapawn manchester science festival bodmas errors final fantasy signorini conditions craft braiding weak imposition wave scattering sorting simultaneous equations finite element method ternary pi approximation day matt parker reuleaux polygons stickers python ucl puzzles hannah fry golden spiral polynomials newcastle realhats logo data rugby latex misleading statistics youtube matrix of cofactors partridge puzzle stirling numbers rhombicuboctahedron finite group draughts london folding tube maps games chess speed pokémon wordle matrix multiplication geogebra go european cup dragon curves royal institution a gamut of games pizza cutting people maths friendly squares numerical analysis noughts and crosses 24 hour maths graphs boundary element methods triangles weather station data visualisation interpolation golden ratio arrangement puzzles zines crossnumbers books javascript hyperbolic surfaces graph theory inline code

Archive

Show me a random blog post
▼ show ▼
© Matthew Scroggs 2012–2026