Saturday, 27 February 2021
Wednesday, 24 February 2021
Friday, 19 February 2021
Magic Square no 1 (4 x 4)
I created this puzzle using a C program, which I wrote myself, and the UNIX / Linux cat and grep commands.
Place numbers in the empty squares until the grid contains each of the numbers 1 to 16 exactly once. The sum of each row, column and diagonal must be the same.
Sunday, 14 February 2021
Sudoku no 581 (Extreme)
Last night a member of the Sudoku Puzzles Facebook group said he had paid £3.30 for a book of extreme sudokus published by a respected puzzle creation company, only to find that the first 15 or so of the puzzles he tried were easy. This one is for him:
Solve online
Friday, 12 February 2021
Sudoku no 580 (Tough)
This puzzle has a Hodoku grade of 640. I double-checked it at sudoku9x9.com which solved it using naked singles, hidden singles, one naked pair and one use of Nishio. I cannot claim that I would have spotted this myself but once I saw the explanation it was easy to follow:
Monday, 8 February 2021
Sudoku no 579 (Extreme)
The site where I usually render my puzzles has been hacked. Hopefully the owners will be able to get it running again soon but until then I will have to format my puzzles elsewhere. I did this one at sudoku9x9.com:
Friday, 5 February 2021
Tuesday, 2 February 2021
Monday, 1 February 2021
Real Word Gogen no 2
Add the 25 letters between A and Y to the grid above. Each one should appear exactly once. When you have finished, you must be able to spell the following words moving horizontally, vertically or diagonally around the grid:
BAROQUE, BUG, CARIBOU, CHAP, CITY, FEUD, JOB, KINDLY, SMIRK, VEX, WORK.
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