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Comments in green were written by me. Comments in blue were not written by me.
2024-12-24
That was great fun again. Thans a lot for all the effort that went into creating these puzzles!
Gert-Jan
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/blog/111
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Chalkdust issue 17
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Mathsteroids on hyperbolic surfaces
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The databet
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Off-by-one errors
Christmas card 2022
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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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Christmas (2021) is over
2021
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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 -5+5φ+√2 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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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
platonic solids
crosswords
probability
anscombe's quartet
finite group
hannah fry
wordle
gerry anderson
signorini conditions
data visualisation
folding paper
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dates
crossnumber
php
databet
determinants
youtube
puzzles
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fonts
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turtles
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edinburgh
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cambridge
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crochet
recursion
datasaurus dozen
pac-man
reddit
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rust
bodmas
golden ratio
sport
latex
graphs
folding tube maps
hats
plastic ratio
countdown
kenilworth
palindromes
advent calendar
error bars
sound
warwick
partridge puzzle
ternary
computational complexity
christmas card
hexapawn
guest posts
estimation
harriss spiral
runge's phenomenon
propositional calculus
crossnumbers
reuleaux polygons
game of life
noughts and crosses
european cup
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programming
trigonometry
books
wool
standard deviation
national lottery
final fantasy
matt parker
javascript
polynomials
accuracy
correlation
approximation
coins
fence posts
chebyshev
fractals
matrices
pi
stickers
matrix multiplication
kings
squares
christmas
nonograms
24 hour maths
boundary element methods
menace
finite element method
geometry
bluesky
misleading statistics
alphabets
games
phd
golden spiral
inline code
arithmetic
data
people maths
numbers
tmip
big internet math-off
geogebra
a gamut of games
martin gardner
pokémon wordle
pi approximation day
newcastle
the aperiodical
light
game show probability
london
nine men's morris
matrix of minors
asteroids
braiding
manchester science festival
electromagnetic field
dinosaurs
bempp
statistics
realhats
mathsjam
frobel
weather station
python
weak imposition
map projections
pokémon
rhombicuboctahedron
quadrilaterals
mean
news
friendly squares
manchester
radio 4
exponential growth
numerical analysis
speed
machine learning
preconditioning
stirling numbers
coventry
dataset
pascal's triangle
zines
london underground
chalkdust magazine
bots
sobolev spaces
dragon curves
oeis
interpolation
hyperbolic surfaces
bubble bobble
mathslogicbot
thirteen
rugby
ucl
live stream
errors
captain scarlet
matrix of cofactors
graph theory
football
logs
sorting
triangles
convergence
craft
wave scattering
simultaneous equations
flexagons
gaussian elimination
logic
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 -5+5φ+√2 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
partridge puzzle
gaussian elimination
nonograms
live stream
fonts
chebyshev
gather town
latex
errors
golden ratio
standard deviation
gerry anderson
royal baby
crosswords
alphabets
raspberry pi
graphs
sobolev spaces
signorini conditions
geogebra
data
mathslogicbot
computational complexity
sport
crossnumber
finite group
platonic solids
propositional calculus
pi
mathsjam
arithmetic
javascript
bluesky
video games
flexagons
chess
turtles
anscombe's quartet
binary
rust
games
finite element method
big internet math-off
pascal's triangle
exponential growth
cambridge
python
cross stitch
quadrilaterals
numerical analysis
hexapawn
braiding
game of life
game show probability
pi approximation day
simultaneous equations
warwick
pokémon
craft
hyperbolic surfaces
newcastle
matrix of cofactors
dates
arrangement puzzles
noughts and crosses
logic
inline code
pythagoras
chalkdust magazine
machine learning
php
martin gardner
wool
radio 4
weak imposition
fractals
london
kings
reddit
probability
go
determinants
coventry
crossnumbers
squares
news
matt parker
stirling numbers
rugby
pizza cutting
plastic ratio
geometry
speed
zines
approximation
misleading statistics
thirteen
wordle
manchester
pokémon wordle
inverse matrices
fence posts
rhombicuboctahedron
harriss spiral
estimation
dragon curves
tetris
draughts
regular expressions
error bars
friendly squares
football
trigonometry
books
asteroids
electromagnetic field
databet
oeis
european cup
christmas
statistics
wave scattering
talking maths in public
christmas card
interpolation
dinosaurs
manchester science festival
polynomials
datasaurus dozen
final fantasy
graph theory
logo
youtube
folding paper
golden spiral
correlation
reuleaux polygons
ucl
tennis
tmip
a gamut of games
ternary
national lottery
folding tube maps
guest posts
london underground
bots
numbers
sound
bubble bobble
logs
royal institution
boundary element methods
realhats
advent calendar
bodmas
captain scarlet
pac-man
data visualisation
people maths
weather station
countdown
phd
curvature
light
the aperiodical
convergence
hannah fry
puzzles
frobel
recursion
mathsteroids
bempp
crochet
triangles
matrix of minors
edinburgh
coins
24 hour maths
sorting
dataset
matrix multiplication
matrices
programming
menace
accuracy
world cup
map projections
palindromes
preconditioning
stickers
hats
nine men's morris
kenilworth
runge's phenomenon
mean
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