mscroggs
.co.uk
mscroggs
.co.uk
blog
puzzles
academic
talks
contact
subscribe
↓ ☰ ↓
subscribe
Loading image...
Comment
Comments
Comments in green were written by me. Comments in blue were not written by me.
2025-12-21
@Matthew, small typo in todays example, bottom left string should be BBBA I feel.
Bob
on
/blog/121
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 ▼
▲ hide ▲
Dec 2023
Christmas card 2023
Nov 2023
Christmas (2023) is coming!
Zines
Sep 2023
TMiP 2023 puzzle hunt
May 2023
Chalkdust issue 17
Apr 2023
Logo Asteroids
Mar 2023
Mathsteroids on hyperbolic surfaces
Feb 2023
The databet
Jan 2023
Christmas (2022) is over
2022
▼ show ▼
▲ hide ▲
Dec 2022
Off-by-one errors
Christmas card 2022
Nov 2022
Christmas (2022) is coming!
Oct 2022
24 Hour Maths Game Show
Mar 2022
Approximating π
Feb 2022
Build your own MENACE
Jan 2022
Christmas (2021) is over
2021
▼ show ▼
▲ hide ▲
Dec 2021
Christmas card 2021
Nov 2021
Christmas (2021) is coming!
Sep 2021
TMiP 2021 puzzle hunt
May 2021
Close encounters of the second kind
Jan 2021
Christmas (2020) is over
2020
▼ show ▼
▲ hide ▲
Dec 2020
Christmas card 2020
Nov 2020
Christmas (2020) is coming!
Jul 2020
Happy -6+τφ Approximation Day!
May 2020
A surprising fact about quadrilaterals
Interesting tautologies
Mar 2020
Log-scaled axes
Feb 2020
PhD thesis, chapter ∞
PhD thesis, chapter 5
PhD thesis, chapter 4
PhD thesis, chapter 3
Inverting a matrix
PhD thesis, chapter 2
Jan 2020
PhD thesis, chapter 1
Gaussian elimination
Matrix multiplication
Christmas (2019) is over
2019
▼ show ▼
▲ hide ▲
Dec 2019
Visualising MENACE's learning
Christmas card 2019
Nov 2019
Christmas (2019) is coming!
Sep 2019
A non-converging LaTeX document
TMiP 2019 treasure punt
Jul 2019
Big Internet Math-Off stickers 2019
Jun 2019
Proving a conjecture
Apr 2019
Harriss and other spirals
Mar 2019
realhats
Jan 2019
Christmas (2018) is over
2018
▼ show ▼
▲ hide ▲
Dec 2018
Christmas cross stitch
MENACE in fiction
Christmas card 2018
Nov 2018
Christmas (2018) is coming!
Sep 2018
Runge's Phenomenon
Jul 2018
World Cup stickers 2018, pt. 3
Mathsteroids
Jun 2018
World Cup stickers 2018, pt. 2
May 2018
A bad Puzzle for Today
Apr 2018
Building MENACEs for other games
Mar 2018
A 20,000-to-1 baby?
World Cup stickers 2018
Jan 2018
Origins of World War I
Christmas (2017) is over
2017
▼ show ▼
▲ hide ▲
Dec 2017
Christmas card 2017
Nov 2017
Christmas (2017) is coming!
MENACE at Manchester Science Festival
Jun 2017
Big Ben Strikes Again
Mar 2017
The end of coins of constant width
Dragon curves II
Feb 2017
The importance of estimation error
Jan 2017
Is MEDUSA the new BODMAS?
2016
▼ show ▼
▲ hide ▲
Dec 2016
Christmas (2016) is over
Video game surfaces
Christmas card 2016
Nov 2016
Christmas (2016) is coming!
Oct 2016
Logical contradictions
Palindromic dates
Sep 2016
Tube map kaleidocycles
Jul 2016
Solving the cross diagonal cover problem
Jun 2016
Braiding, pt. 2
Braiding, pt. 1
Making names in Life
May 2016
Euro 2016 stickers
Mar 2016
Proving Pythagoras' theorem
Dragon curves
The
Mathematical Games
of Martin Gardner
Jan 2016
Christmas (2015) is over
2015
▼ show ▼
▲ hide ▲
Nov 2015
Christmas (2015) is coming!
Oct 2015
How to kick a conversion
How much will I win on the new National Lottery?
Aug 2015
How OEISbot works
MENACE
Mar 2015
Optimal Pac-Man
Tube map stellated rhombicuboctahedron
Logic bot, pt. 2
Design your own flexagon
Jan 2015
Tube map Platonic solids, pt. 3
2014
▼ show ▼
▲ hide ▲
Nov 2014
Logic bot
Sep 2014
Electromagnetic Field talk
Jun 2014
Tennis maths
May 2014
World Cup stickers
Apr 2014
Countdown probability, pt. 2
Countdown probability
Mar 2014
New machine unfriendly £1 coin, pt. 2
New machine unfriendly £1 coin
2013
▼ show ▼
▲ hide ▲
Dec 2013
Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
2012
▼ show ▼
▲ hide ▲
Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
football
pi
frobel
cambridge
youtube
rugby
standard deviation
programming
edinburgh
exponential growth
recursion
go
gaussian elimination
platonic solids
wool
guest posts
harriss spiral
propositional calculus
partridge puzzle
crosswords
bots
folding paper
errors
matrix of minors
oeis
pi approximation day
bluesky
ternary
london underground
convergence
statistics
regular expressions
folding tube maps
hats
simultaneous equations
finite group
machine learning
stirling numbers
a gamut of games
kings
hexapawn
tmip
coins
zines
nonograms
golden spiral
kenilworth
wave scattering
geometry
boundary element methods
nine men's morris
pythagoras
matrices
trigonometry
books
sobolev spaces
game of life
the aperiodical
chess
christmas
pokémon wordle
matrix of cofactors
people maths
warwick
data visualisation
chalkdust magazine
fonts
hyperbolic surfaces
world cup
runge's phenomenon
bodmas
stickers
graphs
curvature
golden ratio
advent calendar
ucl
games
error bars
numerical analysis
matrix multiplication
pascal's triangle
crochet
anscombe's quartet
inverse matrices
flexagons
pizza cutting
probability
bempp
pokémon
video games
preconditioning
craft
mean
pac-man
manchester science festival
polynomials
accuracy
speed
asteroids
christmas card
logic
determinants
mathslogicbot
electromagnetic field
sound
phd
royal baby
game show probability
final fantasy
reuleaux polygons
friendly squares
raspberry pi
noughts and crosses
realhats
databet
inline code
crossnumbers
javascript
finite element method
plastic ratio
cross stitch
php
estimation
news
coventry
fractals
arrangement puzzles
braiding
24 hour maths
latex
approximation
graph theory
gather town
wordle
live stream
weak imposition
mathsjam
countdown
thirteen
logs
sport
tetris
matt parker
binary
manchester
palindromes
misleading statistics
reddit
sorting
turtles
royal institution
newcastle
national lottery
radio 4
dataset
draughts
map projections
chebyshev
dinosaurs
light
interpolation
rhombicuboctahedron
logo
puzzles
london
computational complexity
european cup
hannah fry
arithmetic
rust
triangles
dates
python
weather station
big internet math-off
alphabets
numbers
gerry anderson
mathsteroids
crossnumber
correlation
martin gardner
dragon curves
captain scarlet
menace
datasaurus dozen
fence posts
quadrilaterals
talking maths in public
signorini conditions
geogebra
bubble bobble
data
squares
tennis
Archive
Show me a random blog post
▼ show ▼
▲ hide ▲
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 ▼
▲ hide ▲
Dec 2023
Christmas card 2023
Nov 2023
Christmas (2023) is coming!
Zines
Sep 2023
TMiP 2023 puzzle hunt
May 2023
Chalkdust issue 17
Apr 2023
Logo Asteroids
Mar 2023
Mathsteroids on hyperbolic surfaces
Feb 2023
The databet
Jan 2023
Christmas (2022) is over
2022
▼ show ▼
▲ hide ▲
Dec 2022
Off-by-one errors
Christmas card 2022
Nov 2022
Christmas (2022) is coming!
Oct 2022
24 Hour Maths Game Show
Mar 2022
Approximating π
Feb 2022
Build your own MENACE
Jan 2022
Christmas (2021) is over
2021
▼ show ▼
▲ hide ▲
Dec 2021
Christmas card 2021
Nov 2021
Christmas (2021) is coming!
Sep 2021
TMiP 2021 puzzle hunt
May 2021
Close encounters of the second kind
Jan 2021
Christmas (2020) is over
2020
▼ show ▼
▲ hide ▲
Dec 2020
Christmas card 2020
Nov 2020
Christmas (2020) is coming!
Jul 2020
Happy -6+τφ Approximation Day!
May 2020
A surprising fact about quadrilaterals
Interesting tautologies
Mar 2020
Log-scaled axes
Feb 2020
PhD thesis, chapter ∞
PhD thesis, chapter 5
PhD thesis, chapter 4
PhD thesis, chapter 3
Inverting a matrix
PhD thesis, chapter 2
Jan 2020
PhD thesis, chapter 1
Gaussian elimination
Matrix multiplication
Christmas (2019) is over
2019
▼ show ▼
▲ hide ▲
Dec 2019
Visualising MENACE's learning
Christmas card 2019
Nov 2019
Christmas (2019) is coming!
Sep 2019
A non-converging LaTeX document
TMiP 2019 treasure punt
Jul 2019
Big Internet Math-Off stickers 2019
Jun 2019
Proving a conjecture
Apr 2019
Harriss and other spirals
Mar 2019
realhats
Jan 2019
Christmas (2018) is over
2018
▼ show ▼
▲ hide ▲
Dec 2018
Christmas cross stitch
MENACE in fiction
Christmas card 2018
Nov 2018
Christmas (2018) is coming!
Sep 2018
Runge's Phenomenon
Jul 2018
World Cup stickers 2018, pt. 3
Mathsteroids
Jun 2018
World Cup stickers 2018, pt. 2
May 2018
A bad Puzzle for Today
Apr 2018
Building MENACEs for other games
Mar 2018
A 20,000-to-1 baby?
World Cup stickers 2018
Jan 2018
Origins of World War I
Christmas (2017) is over
2017
▼ show ▼
▲ hide ▲
Dec 2017
Christmas card 2017
Nov 2017
Christmas (2017) is coming!
MENACE at Manchester Science Festival
Jun 2017
Big Ben Strikes Again
Mar 2017
The end of coins of constant width
Dragon curves II
Feb 2017
The importance of estimation error
Jan 2017
Is MEDUSA the new BODMAS?
2016
▼ show ▼
▲ hide ▲
Dec 2016
Christmas (2016) is over
Video game surfaces
Christmas card 2016
Nov 2016
Christmas (2016) is coming!
Oct 2016
Logical contradictions
Palindromic dates
Sep 2016
Tube map kaleidocycles
Jul 2016
Solving the cross diagonal cover problem
Jun 2016
Braiding, pt. 2
Braiding, pt. 1
Making names in Life
May 2016
Euro 2016 stickers
Mar 2016
Proving Pythagoras' theorem
Dragon curves
The
Mathematical Games
of Martin Gardner
Jan 2016
Christmas (2015) is over
2015
▼ show ▼
▲ hide ▲
Nov 2015
Christmas (2015) is coming!
Oct 2015
How to kick a conversion
How much will I win on the new National Lottery?
Aug 2015
How OEISbot works
MENACE
Mar 2015
Optimal Pac-Man
Tube map stellated rhombicuboctahedron
Logic bot, pt. 2
Design your own flexagon
Jan 2015
Tube map Platonic solids, pt. 3
2014
▼ show ▼
▲ hide ▲
Nov 2014
Logic bot
Sep 2014
Electromagnetic Field talk
Jun 2014
Tennis maths
May 2014
World Cup stickers
Apr 2014
Countdown probability, pt. 2
Countdown probability
Mar 2014
New machine unfriendly £1 coin, pt. 2
New machine unfriendly £1 coin
2013
▼ show ▼
▲ hide ▲
Dec 2013
Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
2012
▼ show ▼
▲ hide ▲
Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
ternary
turtles
game show probability
gaussian elimination
finite group
the aperiodical
platonic solids
partridge puzzle
fonts
weak imposition
graphs
reddit
geogebra
pokémon wordle
tmip
palindromes
youtube
dinosaurs
plastic ratio
live stream
probability
crossnumber
golden ratio
zines
guest posts
sound
misleading statistics
mathsteroids
arrangement puzzles
mean
geometry
exponential growth
game of life
standard deviation
braiding
simultaneous equations
logo
royal institution
bempp
pac-man
errors
news
final fantasy
24 hour maths
javascript
menace
sobolev spaces
asteroids
polynomials
chebyshev
radio 4
php
recursion
bluesky
craft
pi
london
graph theory
pythagoras
realhats
gerry anderson
crochet
people maths
a gamut of games
noughts and crosses
cambridge
mathslogicbot
thirteen
runge's phenomenon
nonograms
bodmas
phd
preconditioning
correlation
hexapawn
manchester
hannah fry
cross stitch
books
go
databet
sport
frobel
gather town
logs
regular expressions
dates
pizza cutting
latex
map projections
hyperbolic surfaces
wool
propositional calculus
pi approximation day
error bars
matt parker
world cup
flexagons
reuleaux polygons
raspberry pi
games
inverse matrices
advent calendar
speed
matrices
numerical analysis
convergence
fence posts
estimation
chess
squares
matrix multiplication
christmas card
anscombe's quartet
coins
folding paper
triangles
kenilworth
golden spiral
kings
london underground
countdown
martin gardner
alphabets
programming
draughts
matrix of minors
inline code
talking maths in public
video games
edinburgh
dataset
pokémon
bots
european cup
bubble bobble
hats
rust
oeis
wordle
signorini conditions
stickers
football
determinants
finite element method
friendly squares
wave scattering
newcastle
crossnumbers
captain scarlet
electromagnetic field
warwick
datasaurus dozen
rugby
machine learning
stirling numbers
boundary element methods
quadrilaterals
sorting
nine men's morris
logic
arithmetic
numbers
weather station
big internet math-off
puzzles
python
folding tube maps
royal baby
mathsjam
christmas
tennis
pascal's triangle
interpolation
binary
statistics
fractals
chalkdust magazine
light
rhombicuboctahedron
tetris
curvature
data visualisation
national lottery
crosswords
matrix of cofactors
dragon curves
data
computational complexity
approximation
ucl
accuracy
coventry
trigonometry
manchester science festival
harriss spiral
© Matthew Scroggs 2012–2026
on /blog/121