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.

2016-07-14

@stephan: It looks like the code I wrote to check the solutions were unique contained errors. This might explain why first question was very difficult to solve with logic alone.

Matthew
on /blog/24

×1

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

Jan 2024

Christmas (2023) is over

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

Tags

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2026