George Peter Jelliss
@mayhematics.bsky.social
https://www.mayhematics.com/
knight's tours, variant chess, games and puzzles journal, chessics, etc
knight's tours, variant chess, games and puzzles journal, chessics, etc
Is anyone still writing decent detective stories? Or is it all science fiction and fantasy and romance and superheroes these days.
August 14, 2025 at 2:44 PM
Is anyone still writing decent detective stories? Or is it all science fiction and fantasy and romance and superheroes these days.
It looks as though Netanyahoo and Trump are aiming for a single-state solution, where the Palestinians who stay in Gaza and West Bank become Israel citizens, assuming Hamas can be jailed or thrown out. Big struggle to come though.
August 4, 2025 at 9:56 PM
It looks as though Netanyahoo and Trump are aiming for a single-state solution, where the Palestinians who stay in Gaza and West Bank become Israel citizens, assuming Hamas can be jailed or thrown out. Big struggle to come though.
Last Tusday my GPs called an ambulance to take me to hospital. After triage took blood tests I was left all night before seeing a docor in the morning, and did not get any sleep. This was before the current doctors' strike. Other people were attempting to sleep on the floor or on hard benches.
July 28, 2025 at 6:40 PM
Last Tusday my GPs called an ambulance to take me to hospital. After triage took blood tests I was left all night before seeing a docor in the morning, and did not get any sleep. This was before the current doctors' strike. Other people were attempting to sleep on the floor or on hard benches.
There was an interesting clip from the BBC radio archives earlier today which included Sefton Delmer's account of the Reichstag fire, where he happened to arrive at the same time as the German leaders and tagged onto their party.
July 27, 2025 at 7:16 PM
There was an interesting clip from the BBC radio archives earlier today which included Sefton Delmer's account of the Reichstag fire, where he happened to arrive at the same time as the German leaders and tagged onto their party.
I've started watching a few things on iPlayer. What I don't like is the way it automatically ends with a countdown threatening to start a new episode immediately after one has ended. Hardly giving one enough time even to sign out. Is the BBC so desperate to keep us watching?
April 13, 2025 at 6:45 PM
I've started watching a few things on iPlayer. What I don't like is the way it automatically ends with a countdown threatening to start a new episode immediately after one has ended. Hardly giving one enough time even to sign out. Is the BBC so desperate to keep us watching?
Reposted by George Peter Jelliss
There’s a book. Worth a read.👇
March 13, 2025 at 11:53 AM
There’s a book. Worth a read.👇
I'm finding it painful trying to make sense of the news, now that the crazies have taken over in the US of A.
March 24, 2025 at 9:59 PM
I'm finding it painful trying to make sense of the news, now that the crazies have taken over in the US of A.
Recalled some old work I like: three 44 cell birotary tours with only four acute angles, and and two 48 cell rotary tours without acute angles. To count as tours the boards must be 'connected'.
March 17, 2025 at 9:59 PM
Recalled some old work I like: three 44 cell birotary tours with only four acute angles, and and two 48 cell rotary tours without acute angles. To count as tours the boards must be 'connected'.
Since Trump likes the Royals, instead of making Canada a US state, maybe he could get the USA to join the Commonwealth. I'm sure we would welcome them back!
March 16, 2025 at 8:31 PM
Since Trump likes the Royals, instead of making Canada a US state, maybe he could get the USA to join the Commonwealth. I'm sure we would welcome them back!
First signs of spring. First trolley in the Valley Park Brook.
March 7, 2025 at 2:28 PM
First signs of spring. First trolley in the Valley Park Brook.
The least Starmer should do now, to change Trump's mind, is to cancel the King's invitation.
February 28, 2025 at 11:20 PM
The least Starmer should do now, to change Trump's mind, is to cancel the King's invitation.
Surely the American Constitution must have a way of getting rid of an insane President?
February 21, 2025 at 11:15 AM
Surely the American Constitution must have a way of getting rid of an insane President?
This Celtic Cross tour includes five small crosses (size 1) and one large cross (size 7) formed by knight moves.
February 12, 2025 at 4:02 PM
This Celtic Cross tour includes five small crosses (size 1) and one large cross (size 7) formed by knight moves.
The way some British politicians are toadying up to Trump is nauseating.
February 1, 2025 at 7:14 PM
The way some British politicians are toadying up to Trump is nauseating.
Circular Knight Tour. The 24 black dots mark points whose coordinates from the centre are the Pythagorean pairs
(10,15), (6, 17), (1, 18) whose squares add to 325. So radius is root 325 = ~18.028.
(10,15), (6, 17), (1, 18) whose squares add to 325. So radius is root 325 = ~18.028.
January 30, 2025 at 9:43 AM
Circular Knight Tour. The 24 black dots mark points whose coordinates from the centre are the Pythagorean pairs
(10,15), (6, 17), (1, 18) whose squares add to 325. So radius is root 325 = ~18.028.
(10,15), (6, 17), (1, 18) whose squares add to 325. So radius is root 325 = ~18.028.
My solution of the Onitiu problem for a board 24 by 24.
The knight tour has 180 degree rotary symmetry. The square numbers 1, 4, 9, 16, etc are on the red line and their complements on the blue line.
The knight tour has 180 degree rotary symmetry. The square numbers 1, 4, 9, 16, etc are on the red line and their complements on the blue line.
January 24, 2025 at 2:58 PM
My solution of the Onitiu problem for a board 24 by 24.
The knight tour has 180 degree rotary symmetry. The square numbers 1, 4, 9, 16, etc are on the red line and their complements on the blue line.
The knight tour has 180 degree rotary symmetry. The square numbers 1, 4, 9, 16, etc are on the red line and their complements on the blue line.
Is there a record for the number of overcast days in the north midlands (I'm in Crewe, Cheshire). It seems to have been dark and dull for months here with hardly a glimpse of sun.
January 20, 2025 at 8:14 AM
Is there a record for the number of overcast days in the north midlands (I'm in Crewe, Cheshire). It seems to have been dark and dull for months here with hardly a glimpse of sun.
Why is it made so difficult to open anything without tearing the wrapping these days? It used to be possible to collect the wrappings whole. Tunnock's Caramel biscuits are about the only sensibly wrapped choc bars left.
January 19, 2025 at 9:56 AM
Why is it made so difficult to open anything without tearing the wrapping these days? It used to be possible to collect the wrappings whole. Tunnock's Caramel biscuits are about the only sensibly wrapped choc bars left.
This series on "Human Intelligence" on BBC Radio 4 and Sounds is good, judging by the first three programmes on Socrates, George Washington and Mary Wollstonecraft. Recommended listening.
January 8, 2025 at 7:03 PM
This series on "Human Intelligence" on BBC Radio 4 and Sounds is good, judging by the first three programmes on Socrates, George Washington and Mary Wollstonecraft. Recommended listening.
No sign of rain or snow here in Crewe yet at 9pm, despite forecasts.
January 4, 2025 at 8:57 PM
No sign of rain or snow here in Crewe yet at 9pm, despite forecasts.
Is anyone reading, or writing, these new "Romantasy" books? Looking at some of my unpublished sketches I think one may be adaptable to the genre.
January 1, 2025 at 9:34 PM
Is anyone reading, or writing, these new "Romantasy" books? Looking at some of my unpublished sketches I think one may be adaptable to the genre.
I'm not keen on Christmas, either the religious or the consumerist variety. The endless carolling and booze everywhere gets so boring, and ever more difficult to avoid.
December 16, 2024 at 7:10 PM
I'm not keen on Christmas, either the religious or the consumerist variety. The endless carolling and booze everywhere gets so boring, and ever more difficult to avoid.
Saw sunlight at last this morning after days (weeks?) of gloom. It was even accompanied by a rainbow.
December 14, 2024 at 11:24 AM
Saw sunlight at last this morning after days (weeks?) of gloom. It was even accompanied by a rainbow.
I looked up what ultra-processed food is and it seems to include almost everything that I eat. Even bread!
December 12, 2024 at 7:40 PM
I looked up what ultra-processed food is and it seems to include almost everything that I eat. Even bread!
Here's a number puzzle. 6 is a triangular number (6 = 1 + 2 + 3) and is also a double triangular number (6 = 2x3). What is the next number with this property? [And if you want more: how does the sequence continue?]
November 29, 2024 at 2:30 PM
Here's a number puzzle. 6 is a triangular number (6 = 1 + 2 + 3) and is also a double triangular number (6 = 2x3). What is the next number with this property? [And if you want more: how does the sequence continue?]