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Comments in green were written by me. Comments in blue were not written by me.
2025-12-25
Oh my goodness, this was so fun! Thanks for putting this together, I've never done it before but I think I'm gonna have to start doing it every year. 21 was a beast (my favourite though) and 19 was incredibly sneaky, but forshadowed excellently.
Robert
on
/blog/120
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 -26+eg 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
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
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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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▲ hide ▲
Dec 2013
Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
2012
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▲ hide ▲
Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
final fantasy
dinosaurs
mathsjam
asteroids
matrix of cofactors
arithmetic
tmip
partridge puzzle
geogebra
programming
crosswords
anscombe's quartet
runge's phenomenon
flexagons
python
talking maths in public
dates
quadrilaterals
hexapawn
preconditioning
ucl
platonic solids
gather town
bluesky
gerry anderson
martin gardner
recursion
pythagoras
world cup
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draughts
thirteen
numerical analysis
matrices
golden spiral
propositional calculus
fence posts
polynomials
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standard deviation
captain scarlet
geometry
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bempp
hannah fry
raspberry pi
pi
dataset
ternary
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edinburgh
friendly squares
pizza cutting
rugby
determinants
european cup
mathslogicbot
exponential growth
menace
go
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logs
misleading statistics
guest posts
cambridge
bodmas
game of life
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tennis
approximation
mean
coins
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golden ratio
24 hour maths
oeis
correlation
chalkdust magazine
london
fonts
hyperbolic surfaces
crossnumbers
nine men's morris
big internet math-off
databet
weak imposition
wordle
latex
wool
mathsteroids
hats
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graphs
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stirling numbers
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rust
folding tube maps
manchester
rhombicuboctahedron
trigonometry
convergence
probability
game show probability
braiding
pokémon wordle
pi approximation day
data
a gamut of games
crochet
youtube
matrix of minors
sobolev spaces
christmas
computational complexity
games
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zines
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books
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chebyshev
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reddit
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arrangement puzzles
bots
datasaurus dozen
royal institution
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php
logic
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kings
numbers
triangles
royal baby
harriss spiral
inverse matrices
kenilworth
signorini conditions
live stream
nonograms
weather station
palindromes
folding paper
national lottery
squares
estimation
newcastle
cross stitch
puzzles
data visualisation
realhats
interpolation
curvature
dragon curves
reuleaux polygons
regular expressions
pac-man
video games
binary
finite element method
light
errors
machine learning
craft
football
advent calendar
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 -26+eg 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
crosswords
datasaurus dozen
oeis
data visualisation
chalkdust magazine
warwick
pascal's triangle
mathsjam
friendly squares
statistics
news
christmas
geometry
tmip
noughts and crosses
crossnumbers
recursion
rugby
realhats
logo
thirteen
logic
dinosaurs
gather town
sorting
boundary element methods
fence posts
exponential growth
arithmetic
ternary
php
bempp
pi approximation day
partridge puzzle
hyperbolic surfaces
games
bubble bobble
frobel
sport
convergence
sound
reddit
asteroids
harriss spiral
tennis
crossnumber
preconditioning
european cup
binary
royal institution
football
edinburgh
wave scattering
draughts
determinants
martin gardner
people maths
polynomials
folding paper
simultaneous equations
pokémon wordle
golden ratio
inverse matrices
golden spiral
folding tube maps
weak imposition
captain scarlet
electromagnetic field
machine learning
curvature
mathslogicbot
signorini conditions
mathsteroids
triangles
crochet
interpolation
wordle
numerical analysis
graphs
computational complexity
gerry anderson
gaussian elimination
london
stirling numbers
matt parker
error bars
squares
errors
hats
manchester science festival
probability
the aperiodical
pac-man
flexagons
finite group
final fantasy
wool
matrix of minors
speed
nonograms
rhombicuboctahedron
regular expressions
zines
pizza cutting
chebyshev
bluesky
guest posts
runge's phenomenon
pokémon
hexapawn
big internet math-off
fonts
coins
quadrilaterals
alphabets
newcastle
world cup
puzzles
countdown
programming
javascript
geogebra
plastic ratio
platonic solids
kings
phd
reuleaux polygons
video games
royal baby
manchester
arrangement puzzles
dataset
menace
propositional calculus
raspberry pi
talking maths in public
logs
bots
correlation
trigonometry
data
stickers
bodmas
fractals
cross stitch
mean
sobolev spaces
youtube
nine men's morris
map projections
numbers
pi
a gamut of games
estimation
accuracy
24 hour maths
advent calendar
go
national lottery
london underground
hannah fry
game of life
chess
radio 4
turtles
tetris
databet
braiding
misleading statistics
anscombe's quartet
standard deviation
coventry
dates
weather station
christmas card
dragon curves
inline code
python
pythagoras
matrix multiplication
light
palindromes
finite element method
live stream
cambridge
matrices
ucl
approximation
game show probability
rust
books
graph theory
latex
craft
matrix of cofactors
kenilworth
© Matthew Scroggs 2012–2026
on /blog/120