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2025-06-09
One day a sentient super general AI is going to stumble upon this page and consider it the origin of life.
Mark Hartnady
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/blog/19
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Archive
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How to write a crossnumber
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Chalkdust issue 17
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Logo Asteroids
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Mathsteroids on hyperbolic surfaces
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The databet
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Off-by-one errors
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24 Hour Maths Game Show
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Approximating π
Feb 2022
Build your own MENACE
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Close encounters of the second kind
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2020
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Christmas (2020) is coming!
Jul 2020
Happy -15+3τ-φ-√3 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
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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
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2018
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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
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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
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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
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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
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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
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Dec 2013
Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
2012
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Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
inline code
logo
exponential growth
hannah fry
national lottery
books
matrix of cofactors
go
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reddit
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dates
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determinants
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javascript
logic
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tetris
accuracy
weak imposition
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palindromes
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plastic ratio
raspberry pi
talking maths in public
programming
final fantasy
noughts and crosses
graph theory
24 hour maths
zines
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latex
ternary
quadrilaterals
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geogebra
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errors
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ucl
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php
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countdown
bots
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arrangement puzzles
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data
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triangles
menace
dataset
stickers
crossnumbers
folding tube maps
databet
crochet
people maths
fence posts
martin gardner
chess
realhats
folding paper
coins
matrix multiplication
regular expressions
games
partridge puzzle
game of life
edinburgh
crossnumber
flexagons
european cup
pascal's triangle
christmas
manchester science festival
tmip
a gamut of games
mathsjam
big internet math-off
crosswords
probability
arithmetic
correlation
pokémon
wave scattering
data visualisation
bodmas
kings
london
mathslogicbot
advent calendar
light
python
runge's phenomenon
sobolev spaces
reuleaux polygons
live stream
thirteen
bubble bobble
polynomials
pi approximation day
mean
bluesky
braiding
video games
error bars
speed
frobel
machine learning
dinosaurs
hats
craft
phd
numbers
signorini conditions
preconditioning
binary
the aperiodical
approximation
anscombe's quartet
golden spiral
gerry anderson
christmas card
rugby
alphabets
tennis
wordle
pokémon wordle
nine men's morris
matrices
computational complexity
asteroids
curvature
pac-man
fonts
stirling numbers
estimation
map projections
radio 4
world cup
turtles
hyperbolic surfaces
cambridge
sorting
kenilworth
chebyshev
graphs
pizza cutting
trigonometry
captain scarlet
royal institution
inverse matrices
matrix of minors
numerical analysis
cross stitch
nonograms
misleading statistics
squares
news
finite element method
oeis
sport
convergence
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 -15+3τ-φ-√3 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
christmas card
speed
gerry anderson
pizza cutting
simultaneous equations
graph theory
oeis
24 hour maths
map projections
rust
nine men's morris
ternary
bodmas
kenilworth
interpolation
the aperiodical
golden ratio
crochet
manchester science festival
matrices
hexapawn
computational complexity
go
accuracy
video games
recursion
electromagnetic field
captain scarlet
bubble bobble
a gamut of games
harriss spiral
hats
game show probability
probability
royal baby
estimation
propositional calculus
wool
menace
trigonometry
dataset
sobolev spaces
wave scattering
advent calendar
realhats
flexagons
convergence
preconditioning
countdown
palindromes
pac-man
frobel
pythagoras
world cup
dinosaurs
matrix multiplication
weak imposition
phd
ucl
cambridge
chalkdust magazine
logs
puzzles
machine learning
stirling numbers
finite group
finite element method
asteroids
inverse matrices
pascal's triangle
pokémon
talking maths in public
rugby
bempp
tetris
mathslogicbot
databet
logic
hyperbolic surfaces
gather town
national lottery
regular expressions
stickers
fonts
cross stitch
mean
noughts and crosses
european cup
quadrilaterals
nonograms
chess
programming
determinants
manchester
sorting
php
draughts
alphabets
sport
approximation
final fantasy
geometry
edinburgh
numerical analysis
signorini conditions
kings
dragon curves
martin gardner
turtles
zines
newcastle
matrix of minors
raspberry pi
folding tube maps
javascript
coins
geogebra
logo
statistics
christmas
python
games
football
reuleaux polygons
arithmetic
friendly squares
crosswords
guest posts
london underground
weather station
arrangement puzzles
partridge puzzle
mathsteroids
tennis
mathsjam
pi
datasaurus dozen
fence posts
data
numbers
plastic ratio
crossnumber
sound
inline code
fractals
gaussian elimination
tmip
platonic solids
royal institution
matt parker
thirteen
coventry
folding paper
radio 4
youtube
pokémon wordle
data visualisation
exponential growth
polynomials
reddit
big internet math-off
squares
misleading statistics
pi approximation day
craft
london
standard deviation
matrix of cofactors
boundary element methods
light
errors
news
binary
curvature
golden spiral
latex
dates
game of life
chebyshev
bluesky
people maths
live stream
anscombe's quartet
rhombicuboctahedron
crossnumbers
correlation
books
triangles
braiding
error bars
warwick
wordle
bots
hannah fry
runge's phenomenon
graphs
© Matthew Scroggs 2012–2026
on /blog/19