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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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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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Off-by-one errors
Christmas card 2022
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Oct 2022
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
Nov 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 -7+π+τ 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
▼ show ▼
▲ hide ▲
Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
inverse matrices
cambridge
video games
arrangement puzzles
manchester
computational complexity
python
trigonometry
preconditioning
oeis
the aperiodical
braiding
friendly squares
golden spiral
mean
bempp
harriss spiral
sound
propositional calculus
error bars
big internet math-off
machine learning
manchester science festival
numerical analysis
data visualisation
inline code
reuleaux polygons
mathsteroids
pokémon
wool
phd
fence posts
correlation
live stream
pokémon wordle
platonic solids
thirteen
graphs
puzzles
matrices
football
european cup
regular expressions
national lottery
mathslogicbot
pac-man
warwick
graph theory
squares
raspberry pi
radio 4
advent calendar
a gamut of games
edinburgh
christmas
signorini conditions
coventry
fonts
hexapawn
curvature
wordle
guest posts
partridge puzzle
polynomials
javascript
turtles
weak imposition
london
coins
nonograms
palindromes
bluesky
asteroids
approximation
frobel
databet
hannah fry
chalkdust magazine
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anscombe's quartet
books
craft
ternary
rhombicuboctahedron
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logic
reddit
countdown
final fantasy
speed
data
determinants
plastic ratio
runge's phenomenon
chess
golden ratio
triangles
games
dragon curves
light
alphabets
game of life
convergence
map projections
electromagnetic field
fractals
christmas card
pizza cutting
boundary element methods
weather station
royal institution
kings
tennis
realhats
stirling numbers
bots
crossnumbers
quadrilaterals
world cup
standard deviation
tmip
probability
nine men's morris
gather town
captain scarlet
logs
royal baby
pi
programming
folding paper
simultaneous equations
flexagons
errors
logo
sorting
statistics
crosswords
accuracy
estimation
dinosaurs
talking maths in public
chebyshev
geogebra
folding tube maps
interpolation
matrix of cofactors
bodmas
game show probability
finite element method
geometry
php
people maths
ucl
latex
exponential growth
youtube
london underground
mathsjam
draughts
noughts and crosses
recursion
menace
wave scattering
go
pascal's triangle
dates
matrix of minors
zines
hats
crossnumber
crochet
arithmetic
gerry anderson
finite group
martin gardner
tetris
rust
24 hour maths
binary
rugby
kenilworth
pi approximation day
numbers
sobolev spaces
matt parker
pythagoras
misleading statistics
cross stitch
hyperbolic surfaces
newcastle
matrix multiplication
datasaurus dozen
gaussian elimination
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 -7+π+τ 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
pi
advent calendar
golden ratio
numerical analysis
map projections
craft
convergence
bots
realhats
standard deviation
video games
national lottery
matrix multiplication
signorini conditions
pythagoras
matrices
estimation
live stream
misleading statistics
gather town
interpolation
ternary
triangles
radio 4
chalkdust magazine
dragon curves
boundary element methods
nonograms
pascal's triangle
folding paper
platonic solids
rugby
preconditioning
weather station
chebyshev
geometry
inline code
pokémon wordle
oeis
graphs
arrangement puzzles
nine men's morris
turtles
phd
martin gardner
stirling numbers
draughts
statistics
reddit
crossnumbers
squares
christmas card
fence posts
games
rust
sound
geogebra
wave scattering
gaussian elimination
logo
alphabets
manchester
zines
world cup
mean
hats
fractals
finite element method
crochet
braiding
ucl
polynomials
golden spiral
go
dataset
dinosaurs
electromagnetic field
matrix of minors
trigonometry
finite group
sorting
kings
warwick
tmip
sport
christmas
determinants
errors
tennis
royal baby
runge's phenomenon
flexagons
bodmas
menace
bubble bobble
youtube
arithmetic
databet
cross stitch
mathsjam
guest posts
asteroids
partridge puzzle
puzzles
logic
error bars
hyperbolic surfaces
frobel
wordle
newcastle
inverse matrices
correlation
recursion
propositional calculus
big internet math-off
matrix of cofactors
machine learning
crossnumber
fonts
rhombicuboctahedron
talking maths in public
pizza cutting
plastic ratio
dates
tetris
pokémon
captain scarlet
noughts and crosses
curvature
news
regular expressions
data visualisation
approximation
coins
cambridge
mathsteroids
pi approximation day
datasaurus dozen
mathslogicbot
latex
accuracy
anscombe's quartet
chess
light
london underground
edinburgh
game of life
bempp
final fantasy
javascript
friendly squares
crosswords
graph theory
matt parker
football
thirteen
wool
european cup
game show probability
binary
numbers
logs
the aperiodical
probability
people maths
bluesky
folding tube maps
kenilworth
computational complexity
raspberry pi
stickers
python
manchester science festival
coventry
reuleaux polygons
hexapawn
quadrilaterals
palindromes
harriss spiral
speed
simultaneous equations
countdown
programming
a gamut of games
data
hannah fry
php
books
london
weak imposition
gerry anderson
exponential growth
24 hour maths
pac-man
royal institution
sobolev spaces
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on /blog/111