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

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

Archive

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