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.
2019-12-23
@
Matthew
: There was a mistake: I'd written the rows in the wrong order. I've now corrected it.
Matthew
on
/blog/69
2019-12-23
@
Matthew
: There was a mistake: I'd written the rows in the wrong order. I've now corrected it.
Matthew
on
/blog/69
2019-12-23
@
Matthew
: There was a mistake: I'd written the rows in the wrong order. I've now corrected it.
Matthew
on
/blog/69
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 -4+τ 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
correlation
coventry
estimation
sobolev spaces
chess
pokémon wordle
crosswords
data
cambridge
manchester science festival
manchester
radio 4
raspberry pi
newcastle
weak imposition
bempp
accuracy
realhats
rust
matrix of minors
a gamut of games
phd
squares
chebyshev
runge's phenomenon
logic
final fantasy
standard deviation
arrangement puzzles
london
european cup
bluesky
crossnumbers
people maths
light
cross stitch
databet
london underground
inverse matrices
golden spiral
wordle
live stream
propositional calculus
preconditioning
interpolation
game show probability
pi approximation day
game of life
folding paper
latex
countdown
mean
thirteen
national lottery
regular expressions
fonts
pi
the aperiodical
plastic ratio
guest posts
mathsjam
curvature
coins
nine men's morris
logs
logo
weather station
edinburgh
anscombe's quartet
error bars
dataset
sport
errors
numbers
dates
stickers
news
reddit
signorini conditions
fractals
arithmetic
harriss spiral
computational complexity
rugby
warwick
hannah fry
nonograms
gather town
ucl
hyperbolic surfaces
geogebra
bubble bobble
partridge puzzle
platonic solids
pizza cutting
numerical analysis
football
zines
probability
royal institution
video games
matrix multiplication
royal baby
speed
go
graphs
golden ratio
inline code
draughts
finite group
alphabets
misleading statistics
machine learning
sorting
javascript
triangles
map projections
finite element method
boundary element methods
crossnumber
convergence
craft
pac-man
advent calendar
binary
simultaneous equations
datasaurus dozen
matrix of cofactors
graph theory
world cup
24 hour maths
puzzles
dragon curves
christmas card
crochet
tennis
folding tube maps
martin gardner
recursion
data visualisation
books
electromagnetic field
bodmas
stirling numbers
polynomials
noughts and crosses
chalkdust magazine
statistics
ternary
games
php
pascal's triangle
palindromes
big internet math-off
kings
talking maths in public
mathslogicbot
approximation
programming
braiding
friendly squares
captain scarlet
wave scattering
hexapawn
gerry anderson
flexagons
trigonometry
fence posts
determinants
hats
youtube
pythagoras
dinosaurs
rhombicuboctahedron
quadrilaterals
oeis
reuleaux polygons
mathsteroids
turtles
tmip
kenilworth
menace
frobel
matt parker
pokémon
sound
python
matrices
asteroids
christmas
wool
tetris
geometry
exponential growth
bots
gaussian elimination
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 -4+τ 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
reddit
matrices
football
nonograms
platonic solids
bots
graph theory
oeis
error bars
sound
anscombe's quartet
boundary element methods
craft
talking maths in public
trigonometry
computational complexity
pythagoras
convergence
warwick
raspberry pi
kenilworth
christmas
mean
sobolev spaces
polynomials
dates
european cup
radio 4
speed
plastic ratio
crossnumber
countdown
advent calendar
thirteen
game show probability
bluesky
pac-man
wool
geogebra
pokémon wordle
data
arithmetic
live stream
golden spiral
exponential growth
pi
zines
hyperbolic surfaces
graphs
books
guest posts
friendly squares
binary
statistics
geometry
matt parker
javascript
python
dinosaurs
dragon curves
runge's phenomenon
datasaurus dozen
fonts
arrangement puzzles
video games
wordle
crochet
games
stirling numbers
hannah fry
latex
go
chebyshev
signorini conditions
mathsjam
alphabets
pascal's triangle
squares
finite element method
tennis
puzzles
bubble bobble
london
national lottery
mathsteroids
game of life
a gamut of games
pokémon
machine learning
manchester
inverse matrices
accuracy
newcastle
coventry
flexagons
news
curvature
braiding
martin gardner
bempp
matrix multiplication
regular expressions
inline code
probability
manchester science festival
rust
estimation
crossnumbers
bodmas
fence posts
christmas card
london underground
ucl
frobel
stickers
misleading statistics
hexapawn
phd
errors
triangles
wave scattering
turtles
chalkdust magazine
coins
ternary
pizza cutting
people maths
sport
databet
cambridge
partridge puzzle
menace
interpolation
matrix of cofactors
world cup
programming
weak imposition
chess
data visualisation
rugby
reuleaux polygons
draughts
edinburgh
captain scarlet
numbers
gather town
logs
determinants
folding paper
mathslogicbot
fractals
php
preconditioning
asteroids
hats
big internet math-off
propositional calculus
final fantasy
electromagnetic field
noughts and crosses
cross stitch
golden ratio
gaussian elimination
weather station
realhats
standard deviation
dataset
numerical analysis
tetris
rhombicuboctahedron
the aperiodical
quadrilaterals
correlation
approximation
nine men's morris
recursion
light
youtube
simultaneous equations
folding tube maps
logo
royal institution
24 hour maths
kings
tmip
crosswords
pi approximation day
finite group
map projections
sorting
harriss spiral
gerry anderson
logic
matrix of minors
royal baby
palindromes
© Matthew Scroggs 2012–2026
on /blog/69