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Comments in green were written by me. Comments in blue were not written by me.
2024-12-25
Thanks for the great puzzles! It's nice to be reminded I haven't forgotten everything I learned in school.
James D
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/blog/111
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Archive
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A nonogram alphabet
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How to write a crossnumber
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Friendly squares
2024
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A regular expression Christmas puzzle
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Chalkdust issue 17
Apr 2023
Logo Asteroids
Mar 2023
Mathsteroids on hyperbolic surfaces
Feb 2023
The databet
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Christmas (2022) is over
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Off-by-one errors
Christmas card 2022
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Christmas (2022) is coming!
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24 Hour Maths Game Show
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Approximating π
Feb 2022
Build your own MENACE
Jan 2022
Christmas (2021) is over
2021
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Christmas card 2021
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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 -13+e+τ√2+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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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
▼ show ▼
▲ 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
stirling numbers
hyperbolic surfaces
pizza cutting
fonts
kings
light
interpolation
flexagons
graphs
christmas
sobolev spaces
the aperiodical
london underground
boundary element methods
christmas card
standard deviation
datasaurus dozen
raspberry pi
fractals
logo
coventry
hats
sorting
geometry
advent calendar
logic
computational complexity
sound
golden spiral
dataset
pi
nine men's morris
partridge puzzle
friendly squares
approximation
national lottery
bempp
tennis
chalkdust magazine
frobel
wave scattering
databet
weather station
hexapawn
preconditioning
triangles
coins
bubble bobble
harriss spiral
reuleaux polygons
folding paper
fence posts
books
ternary
exponential growth
pythagoras
errors
dinosaurs
thirteen
crochet
newcastle
quadrilaterals
braiding
platonic solids
golden ratio
guest posts
hannah fry
rugby
countdown
tmip
manchester
chebyshev
warwick
misleading statistics
london
regular expressions
royal institution
pokémon
big internet math-off
statistics
ucl
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tetris
crossnumber
bots
craft
edinburgh
matrices
crosswords
runge's phenomenon
asteroids
royal baby
inline code
convergence
rust
curvature
nonograms
arrangement puzzles
sport
zines
error bars
realhats
matrix of cofactors
weak imposition
menace
pokémon wordle
numbers
a gamut of games
youtube
propositional calculus
24 hour maths
pac-man
gerry anderson
probability
determinants
matrix of minors
oeis
pi approximation day
numerical analysis
plastic ratio
alphabets
data visualisation
bodmas
pascal's triangle
squares
stickers
polynomials
european cup
binary
anscombe's quartet
news
rhombicuboctahedron
machine learning
reddit
game show probability
php
gather town
draughts
world cup
cambridge
puzzles
football
folding tube maps
arithmetic
radio 4
go
python
matrix multiplication
javascript
kenilworth
dates
data
manchester science festival
graph theory
electromagnetic field
simultaneous equations
recursion
matt parker
mathslogicbot
programming
games
map projections
geogebra
trigonometry
estimation
noughts and crosses
dragon curves
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cross stitch
mathsjam
wordle
finite element method
chess
final fantasy
signorini conditions
latex
turtles
bluesky
wool
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logs
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speed
inverse matrices
finite group
gaussian elimination
correlation
video games
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talking maths in public
people maths
captain scarlet
accuracy
mean
martin gardner
game of life
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 -13+e+τ√2+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
world cup
pi
map projections
draughts
reuleaux polygons
determinants
christmas card
crossnumbers
kenilworth
newcastle
standard deviation
a gamut of games
rhombicuboctahedron
approximation
bubble bobble
pascal's triangle
platonic solids
hannah fry
pac-man
puzzles
error bars
harriss spiral
probability
dataset
the aperiodical
crochet
warwick
sport
coins
geometry
mean
interpolation
game of life
manchester
bluesky
turtles
graphs
dinosaurs
logs
menace
golden spiral
flexagons
javascript
python
chalkdust magazine
wordle
weather station
signorini conditions
video games
folding tube maps
edinburgh
php
pi approximation day
nonograms
final fantasy
anscombe's quartet
regular expressions
martin gardner
finite element method
asteroids
misleading statistics
european cup
reddit
tmip
partridge puzzle
arithmetic
wool
inline code
national lottery
alphabets
fence posts
london
news
guest posts
raspberry pi
football
sobolev spaces
hexapawn
thirteen
hats
matrices
plastic ratio
propositional calculus
triangles
arrangement puzzles
matt parker
weak imposition
people maths
pokémon
machine learning
manchester science festival
countdown
rust
ternary
craft
logic
squares
london underground
recursion
ucl
tennis
inverse matrices
speed
dragon curves
cross stitch
statistics
books
numbers
computational complexity
tetris
gaussian elimination
game show probability
matrix of minors
wave scattering
binary
kings
preconditioning
noughts and crosses
data
quadrilaterals
coventry
trigonometry
bempp
games
advent calendar
mathsjam
chess
finite group
realhats
captain scarlet
pizza cutting
oeis
datasaurus dozen
phd
accuracy
rugby
latex
dates
youtube
graph theory
go
logo
convergence
frobel
estimation
radio 4
sorting
matrix of cofactors
polynomials
friendly squares
matrix multiplication
exponential growth
talking maths in public
fractals
boundary element methods
stirling numbers
chebyshev
databet
sound
gerry anderson
cambridge
gather town
royal baby
palindromes
correlation
hyperbolic surfaces
simultaneous equations
folding paper
mathslogicbot
crossnumber
zines
pokémon wordle
data visualisation
curvature
big internet math-off
numerical analysis
golden ratio
geogebra
christmas
pythagoras
royal institution
errors
electromagnetic field
braiding
runge's phenomenon
crosswords
light
bodmas
programming
fonts
stickers
live stream
mathsteroids
bots
24 hour maths
nine men's morris
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on /blog/111