mscroggs.co.uk

mscroggs.co.uk

blog puzzles academic talks contact subscribe ↓ ☰ ↓

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.

2024-12-23

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

2024-12-23

@Dr. Matrix: Thanks, I've corrected it

Matthew
on /blog/111

Archive

Show me a random blog post

2025

Jun 2025

A nonogram alphabet

Mar 2025

How to write a crossnumber

Jan 2025

Christmas (2024) is over
Friendly squares

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

Tags

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2025