mscroggs
.co.uk
mscroggs
.co.uk
blog
puzzles
academic
talks
contact
subscribe
↓ ☰ ↓
subscribe
Loading image...
Comment
Comments
Comments in green were written by me. Comments in blue were not written by me.
2023-12-24
This year's puzzle was a roller coaster unlike last year's. Do not assume anything is true except what can be deduced. Can't wait to see what tomorrow's clue is.
Aaron
on
/blog/107
×1
×1
×1
×1
×1
Archive
Show me a random blog post
2025
Jun 2025
A nonogram alphabet
Mar 2025
How to write a crossnumber
Jan 2025
Christmas (2024) is over
Friendly squares
2024
▼ show ▼
▲ hide ▲
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+g-π 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
matt parker
martin gardner
machine learning
phd
asteroids
manchester
computational complexity
signorini conditions
squares
arithmetic
kings
mathslogicbot
data visualisation
latex
tennis
dinosaurs
sorting
craft
approximation
sport
gaussian elimination
raspberry pi
logs
quadrilaterals
fonts
standard deviation
london
weather station
finite element method
matrices
edinburgh
curvature
matrix of cofactors
game of life
platonic solids
python
people maths
game show probability
puzzles
reuleaux polygons
advent calendar
probability
live stream
football
stickers
nonograms
chess
geometry
propositional calculus
cambridge
pythagoras
bubble bobble
gather town
fence posts
alphabets
go
zines
statistics
dates
radio 4
boundary element methods
royal institution
rhombicuboctahedron
logo
regular expressions
braiding
national lottery
pac-man
folding paper
sound
speed
pi approximation day
european cup
matrix multiplication
turtles
preconditioning
sobolev spaces
estimation
crochet
plastic ratio
christmas card
realhats
friendly squares
royal baby
hyperbolic surfaces
cross stitch
london underground
crossnumber
error bars
data
trigonometry
light
books
coins
javascript
numbers
talking maths in public
golden ratio
convergence
graphs
runge's phenomenon
determinants
programming
misleading statistics
weak imposition
palindromes
newcastle
interpolation
hannah fry
hexapawn
finite group
dragon curves
logic
php
draughts
errors
pascal's triangle
matrix of minors
dataset
manchester science festival
bempp
pi
geogebra
youtube
correlation
crossnumbers
nine men's morris
mathsteroids
recursion
ucl
binary
chalkdust magazine
noughts and crosses
exponential growth
ternary
polynomials
games
simultaneous equations
map projections
reddit
flexagons
stirling numbers
a gamut of games
mean
folding tube maps
final fantasy
chebyshev
hats
christmas
video games
inverse matrices
anscombe's quartet
graph theory
databet
big internet math-off
accuracy
news
triangles
tmip
inline code
bodmas
the aperiodical
numerical analysis
electromagnetic field
24 hour maths
frobel
menace
wave scattering
world cup
datasaurus dozen
mathsjam
wool
bots
countdown
pizza cutting
fractals
guest posts
captain scarlet
oeis
gerry anderson
rugby
harriss spiral
crosswords
golden spiral
Archive
Show me a random blog post
▼ show ▼
▲ hide ▲
2025
Jun 2025
A nonogram alphabet
Mar 2025
How to write a crossnumber
Jan 2025
Christmas (2024) is over
Friendly squares
2024
▼ show ▼
▲ hide ▲
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+g-π 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
rhombicuboctahedron
crossnumbers
electromagnetic field
oeis
matrix multiplication
interpolation
a gamut of games
chalkdust magazine
machine learning
dragon curves
london
preconditioning
menace
triangles
realhats
matrix of cofactors
arithmetic
weather station
pascal's triangle
matt parker
royal baby
bots
advent calendar
error bars
finite group
world cup
inverse matrices
london underground
binary
numerical analysis
php
accuracy
statistics
edinburgh
propositional calculus
nonograms
live stream
countdown
zines
phd
reddit
hexapawn
asteroids
crochet
chebyshev
weak imposition
chess
latex
flexagons
go
braiding
mathslogicbot
royal institution
game show probability
crosswords
boundary element methods
bodmas
hats
mean
books
computational complexity
geogebra
wool
pac-man
people maths
fractals
matrices
platonic solids
ucl
pizza cutting
runge's phenomenon
determinants
squares
gerry anderson
turtles
national lottery
trigonometry
raspberry pi
programming
newcastle
recursion
plastic ratio
standard deviation
correlation
gather town
graph theory
bubble bobble
pythagoras
stickers
speed
bempp
coins
graphs
the aperiodical
draughts
finite element method
crossnumber
wave scattering
christmas
python
dinosaurs
tennis
cambridge
news
final fantasy
pi approximation day
hannah fry
sobolev spaces
sound
simultaneous equations
light
games
alphabets
folding paper
signorini conditions
errors
geometry
craft
misleading statistics
mathsteroids
palindromes
stirling numbers
european cup
convergence
data
noughts and crosses
inline code
big internet math-off
manchester science festival
exponential growth
golden spiral
hyperbolic surfaces
football
friendly squares
manchester
game of life
probability
datasaurus dozen
javascript
harriss spiral
video games
matrix of minors
databet
sport
pi
sorting
quadrilaterals
mathsjam
estimation
reuleaux polygons
gaussian elimination
puzzles
24 hour maths
golden ratio
regular expressions
cross stitch
tmip
curvature
kings
fonts
folding tube maps
guest posts
fence posts
polynomials
anscombe's quartet
rugby
nine men's morris
christmas card
talking maths in public
data visualisation
dataset
martin gardner
logo
logic
captain scarlet
youtube
ternary
dates
approximation
radio 4
logs
numbers
map projections
frobel
© Matthew Scroggs 2012–2025
on /blog/107