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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
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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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▲ hide ▲
Dec 2020
Christmas card 2020
Nov 2020
Christmas (2020) is coming!
Jul 2020
Happy -3+τ-φ 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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▲ 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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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
hexapawn
platonic solids
geometry
interpolation
javascript
databet
crosswords
people maths
inverse matrices
polynomials
palindromes
arithmetic
christmas
numerical analysis
golden spiral
fonts
convergence
manchester science festival
numbers
manchester
signorini conditions
edinburgh
determinants
martin gardner
cross stitch
hannah fry
nine men's morris
warwick
plastic ratio
nonograms
light
raspberry pi
sound
game show probability
trigonometry
python
advent calendar
weather station
christmas card
world cup
sobolev spaces
cambridge
alphabets
talking maths in public
fractals
big internet math-off
partridge puzzle
logic
national lottery
graph theory
bempp
crossnumber
triangles
noughts and crosses
realhats
games
ternary
propositional calculus
machine learning
matt parker
simultaneous equations
phd
video games
pokémon wordle
crochet
php
reddit
bodmas
stickers
matrix of minors
dragon curves
matrix multiplication
electromagnetic field
hyperbolic surfaces
thirteen
golden ratio
curvature
exponential growth
regular expressions
inline code
london underground
stirling numbers
pac-man
chalkdust magazine
wave scattering
final fantasy
european cup
latex
runge's phenomenon
dataset
the aperiodical
folding tube maps
data
tetris
24 hour maths
a gamut of games
finite group
countdown
finite element method
newcastle
ucl
binary
oeis
football
tennis
chebyshev
map projections
pizza cutting
braiding
game of life
live stream
boundary element methods
kings
gaussian elimination
bots
mathsjam
chess
sport
wordle
pascal's triangle
flexagons
go
geogebra
friendly squares
approximation
statistics
error bars
frobel
draughts
kenilworth
pi approximation day
estimation
rust
craft
puzzles
captain scarlet
bluesky
data visualisation
probability
wool
coventry
bubble bobble
computational complexity
graphs
reuleaux polygons
fence posts
speed
zines
radio 4
harriss spiral
youtube
logs
anscombe's quartet
squares
royal institution
matrix of cofactors
sorting
pi
accuracy
folding paper
turtles
correlation
programming
crossnumbers
pokémon
menace
recursion
gerry anderson
arrangement puzzles
asteroids
books
hats
gather town
weak imposition
datasaurus dozen
standard deviation
coins
news
dinosaurs
mathslogicbot
mean
pythagoras
tmip
dates
london
mathsteroids
guest posts
logo
royal baby
misleading statistics
rhombicuboctahedron
preconditioning
quadrilaterals
matrices
errors
rugby
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 -3+τ-φ 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
game of life
data visualisation
javascript
world cup
dataset
propositional calculus
pascal's triangle
reuleaux polygons
partridge puzzle
logs
python
recursion
guest posts
boundary element methods
asteroids
frobel
runge's phenomenon
golden ratio
approximation
game show probability
plastic ratio
finite element method
24 hour maths
arrangement puzzles
kings
ternary
sorting
countdown
books
dinosaurs
friendly squares
electromagnetic field
craft
pizza cutting
numerical analysis
pac-man
pokémon
speed
latex
matrix of cofactors
european cup
christmas
anscombe's quartet
triangles
flexagons
the aperiodical
chess
matt parker
folding tube maps
nonograms
platonic solids
wave scattering
final fantasy
convergence
wool
manchester science festival
finite group
mathsteroids
pokémon wordle
exponential growth
edinburgh
captain scarlet
sound
map projections
pi approximation day
logo
misleading statistics
programming
polynomials
hyperbolic surfaces
alphabets
graph theory
pi
dragon curves
hexapawn
martin gardner
video games
bluesky
crosswords
go
talking maths in public
chalkdust magazine
rugby
london
tmip
bubble bobble
estimation
people maths
noughts and crosses
geogebra
football
fence posts
kenilworth
inverse matrices
fractals
matrices
coins
golden spiral
warwick
stirling numbers
crossnumber
nine men's morris
light
zines
realhats
graphs
cross stitch
live stream
mean
data
standard deviation
rhombicuboctahedron
matrix of minors
advent calendar
curvature
mathslogicbot
gaussian elimination
hats
big internet math-off
stickers
chebyshev
geometry
coventry
ucl
determinants
royal baby
crossnumbers
sobolev spaces
errors
sport
rust
accuracy
royal institution
preconditioning
tetris
probability
bempp
tennis
statistics
thirteen
weather station
news
regular expressions
bodmas
inline code
interpolation
menace
palindromes
manchester
hannah fry
computational complexity
bots
a gamut of games
pythagoras
gather town
london underground
gerry anderson
dates
weak imposition
oeis
games
php
cambridge
squares
trigonometry
signorini conditions
crochet
harriss spiral
error bars
newcastle
folding paper
raspberry pi
fonts
christmas card
mathsjam
binary
turtles
quadrilaterals
reddit
simultaneous equations
national lottery
puzzles
braiding
phd
numbers
databet
correlation
draughts
machine learning
datasaurus dozen
wordle
youtube
radio 4
matrix multiplication
arithmetic
logic
© Matthew Scroggs 2012–2026
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