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Comments in green were written by me. Comments in blue were not written by me.
2025-12-25
Thanks for putting this together. I just happened to see someone post about the challenge on Mastodon early in December and then quickly got hooked. I've really enjoyed all the puzzles.
Steve
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/blog/120
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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
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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
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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
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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
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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
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▲ 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
big internet math-off
martin gardner
correlation
datasaurus dozen
rhombicuboctahedron
european cup
electromagnetic field
menace
polynomials
matrix of minors
simultaneous equations
sport
mean
runge's phenomenon
draughts
guest posts
finite group
preconditioning
noughts and crosses
friendly squares
raspberry pi
craft
newcastle
crosswords
realhats
recursion
quadrilaterals
matt parker
24 hour maths
data visualisation
stickers
sorting
accuracy
sobolev spaces
approximation
errors
probability
arithmetic
hyperbolic surfaces
computational complexity
misleading statistics
dinosaurs
weather station
chebyshev
folding tube maps
thirteen
warwick
crochet
countdown
trigonometry
alphabets
hats
latex
pascal's triangle
flexagons
london underground
phd
geometry
bubble bobble
bluesky
london
zines
youtube
people maths
matrix of cofactors
pokémon
talking maths in public
books
partridge puzzle
bodmas
bots
estimation
news
rust
finite element method
boundary element methods
pythagoras
tmip
coins
databet
matrix multiplication
hannah fry
gerry anderson
python
fonts
a gamut of games
kenilworth
mathsjam
standard deviation
palindromes
ternary
tetris
chalkdust magazine
reddit
logo
geogebra
go
gaussian elimination
world cup
numerical analysis
arrangement puzzles
fence posts
fractals
national lottery
frobel
anscombe's quartet
dataset
pokémon wordle
pi approximation day
propositional calculus
bempp
final fantasy
pizza cutting
dragon curves
map projections
christmas
crossnumber
tennis
binary
speed
gather town
royal baby
programming
numbers
statistics
error bars
wordle
reuleaux polygons
squares
hexapawn
light
exponential growth
christmas card
royal institution
mathsteroids
wool
convergence
braiding
turtles
curvature
pi
captain scarlet
oeis
games
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game show probability
interpolation
logs
asteroids
rugby
cambridge
mathslogicbot
graph theory
javascript
logic
radio 4
inverse matrices
signorini conditions
plastic ratio
graphs
platonic solids
machine learning
live stream
regular expressions
edinburgh
folding paper
manchester
pac-man
php
puzzles
golden ratio
nine men's morris
manchester science festival
golden spiral
triangles
inline code
nonograms
cross stitch
advent calendar
weak imposition
data
crossnumbers
dates
kings
video games
determinants
sound
matrices
football
chess
stirling numbers
ucl
harriss spiral
coventry
the aperiodical
wave scattering
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
rhombicuboctahedron
london underground
christmas card
preconditioning
graphs
databet
golden ratio
matrix of cofactors
sobolev spaces
go
talking maths in public
matrix of minors
bodmas
braiding
logic
flexagons
sport
finite element method
raspberry pi
manchester
phd
regular expressions
wordle
stirling numbers
coins
fence posts
latex
binary
accuracy
php
machine learning
bots
convergence
matt parker
folding paper
fractals
asteroids
data
a gamut of games
folding tube maps
turtles
sound
rust
signorini conditions
polynomials
pythagoras
crossnumber
standard deviation
chebyshev
javascript
coventry
newcastle
mathsteroids
quadrilaterals
datasaurus dozen
chess
tetris
royal institution
christmas
pokémon
oeis
mean
books
geogebra
hats
computational complexity
finite group
pizza cutting
news
weather station
graph theory
cross stitch
stickers
wool
warwick
crossnumbers
sorting
plastic ratio
radio 4
palindromes
the aperiodical
martin gardner
tmip
correlation
pi approximation day
inline code
london
advent calendar
video games
error bars
realhats
captain scarlet
craft
final fantasy
rugby
draughts
game of life
errors
arrangement puzzles
ucl
simultaneous equations
gaussian elimination
24 hour maths
data visualisation
zines
golden spiral
propositional calculus
frobel
dates
hannah fry
noughts and crosses
squares
speed
logo
football
determinants
games
curvature
inverse matrices
game show probability
chalkdust magazine
kings
bluesky
reddit
puzzles
exponential growth
interpolation
menace
alphabets
mathslogicbot
statistics
kenilworth
manchester science festival
hyperbolic surfaces
recursion
cambridge
world cup
european cup
youtube
pascal's triangle
hexapawn
programming
pokémon wordle
nine men's morris
crochet
ternary
tennis
electromagnetic field
crosswords
trigonometry
runge's phenomenon
mathsjam
gerry anderson
weak imposition
light
nonograms
royal baby
edinburgh
big internet math-off
arithmetic
numerical analysis
numbers
python
wave scattering
misleading statistics
map projections
platonic solids
matrices
friendly squares
estimation
dinosaurs
fonts
guest posts
logs
bempp
harriss spiral
live stream
anscombe's quartet
reuleaux polygons
bubble bobble
dragon curves
pac-man
countdown
pi
approximation
partridge puzzle
triangles
geometry
thirteen
probability
people maths
national lottery
matrix multiplication
gather town
dataset
boundary element methods
© Matthew Scroggs 2012–2026
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