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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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Dec 2020
Christmas card 2020
Nov 2020
Christmas (2020) is coming!
Jul 2020
Happy -10+e√2+5√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
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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
fonts
matrix of cofactors
binary
news
sobolev spaces
convergence
nine men's morris
curvature
graph theory
error bars
frobel
computational complexity
craft
pokémon
nonograms
games
noughts and crosses
reddit
dataset
hannah fry
bubble bobble
recursion
statistics
matt parker
the aperiodical
dragon curves
guest posts
coins
christmas
bluesky
tmip
turtles
newcastle
numbers
php
thirteen
phd
gerry anderson
london
trigonometry
pizza cutting
sorting
books
people maths
tetris
manchester science festival
ternary
tennis
friendly squares
london underground
polynomials
radio 4
crossnumber
propositional calculus
a gamut of games
menace
youtube
quadrilaterals
correlation
geometry
reuleaux polygons
errors
draughts
geogebra
pi approximation day
pokémon wordle
game of life
partridge puzzle
matrix multiplication
determinants
dinosaurs
flexagons
misleading statistics
inline code
numerical analysis
map projections
sport
light
video games
interpolation
logs
boundary element methods
arithmetic
golden ratio
weather station
hats
christmas card
oeis
game show probability
warwick
chess
data
wordle
pi
logic
databet
gaussian elimination
raspberry pi
crosswords
probability
data visualisation
national lottery
zines
fractals
mean
hyperbolic surfaces
pythagoras
crossnumbers
weak imposition
stirling numbers
bots
rhombicuboctahedron
royal institution
edinburgh
folding paper
signorini conditions
logo
alphabets
latex
martin gardner
matrix of minors
sound
python
finite group
hexapawn
graphs
coventry
regular expressions
folding tube maps
puzzles
royal baby
chalkdust magazine
crochet
approximation
european cup
captain scarlet
kenilworth
asteroids
realhats
machine learning
go
big internet math-off
cambridge
javascript
pascal's triangle
harriss spiral
squares
talking maths in public
wave scattering
live stream
gather town
golden spiral
accuracy
finite element method
countdown
final fantasy
pac-man
palindromes
estimation
mathslogicbot
datasaurus dozen
arrangement puzzles
runge's phenomenon
24 hour maths
football
preconditioning
advent calendar
rugby
programming
electromagnetic field
bodmas
exponential growth
bempp
mathsjam
manchester
simultaneous equations
kings
stickers
world cup
matrices
braiding
wool
triangles
rust
mathsteroids
fence posts
cross stitch
ucl
chebyshev
inverse matrices
speed
plastic ratio
standard deviation
dates
anscombe's quartet
platonic solids
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 -10+e√2+5√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
matrix of cofactors
a gamut of games
matrices
tmip
youtube
craft
friendly squares
latex
royal baby
numbers
exponential growth
ternary
matt parker
reuleaux polygons
stickers
chess
standard deviation
bluesky
inline code
logic
fractals
advent calendar
fonts
arithmetic
pascal's triangle
gaussian elimination
hexapawn
plastic ratio
kings
cross stitch
draughts
speed
boundary element methods
rugby
manchester science festival
cambridge
datasaurus dozen
pac-man
talking maths in public
dataset
pizza cutting
hannah fry
matrix of minors
crochet
oeis
sorting
triangles
map projections
captain scarlet
folding tube maps
mathsteroids
christmas card
frobel
kenilworth
electromagnetic field
video games
final fantasy
light
raspberry pi
databet
tetris
gerry anderson
graph theory
ucl
edinburgh
palindromes
mean
regular expressions
python
simultaneous equations
gather town
reddit
partridge puzzle
news
anscombe's quartet
graphs
mathslogicbot
warwick
finite group
data visualisation
puzzles
chalkdust magazine
realhats
recursion
24 hour maths
noughts and crosses
pi approximation day
zines
wool
logs
turtles
coventry
big internet math-off
numerical analysis
polynomials
alphabets
interpolation
london
thirteen
golden spiral
geometry
guest posts
dinosaurs
errors
statistics
go
curvature
arrangement puzzles
finite element method
game of life
signorini conditions
folding paper
menace
determinants
nonograms
wordle
error bars
platonic solids
sound
inverse matrices
data
national lottery
php
pokémon wordle
live stream
dates
machine learning
crossnumber
bots
crossnumbers
harriss spiral
the aperiodical
misleading statistics
nine men's morris
stirling numbers
pi
estimation
rhombicuboctahedron
bodmas
people maths
bubble bobble
convergence
quadrilaterals
preconditioning
trigonometry
accuracy
approximation
radio 4
javascript
tennis
pokémon
dragon curves
propositional calculus
london underground
european cup
christmas
logo
bempp
martin gardner
game show probability
rust
binary
weak imposition
hyperbolic surfaces
braiding
matrix multiplication
football
probability
flexagons
sport
fence posts
runge's phenomenon
countdown
manchester
world cup
correlation
phd
weather station
games
wave scattering
geogebra
chebyshev
books
hats
mathsjam
sobolev spaces
computational complexity
squares
newcastle
asteroids
programming
pythagoras
golden ratio
coins
royal institution
crosswords
© Matthew Scroggs 2012–2026
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