128 days ago

Has a Sudoku with 16 clues finally been discovered? How good are you at Sudoku?

Alan from Titirangi

It is supposed to be impossible for a "Sudoku" with 16 clues to have a unique solution. Try to solve the Sudoku below before you look here:
aaamazingphoenix.wordpress.com...

The “Sudoku” below has 16 clues and two solutions. However the two solutions appear to only swap around the 8s and 9s. Since there are no 8s or 9s in the original puzzle does this mean the solution is unique?

It is believed that there is no Sudoku with 16 clues i.e. with a unique solution. It was mathematically proven in 2012 by Gary McGuire and his team that 17 is the minimum number of clues possible for a valid Sudoku puzzle to have a unique solution; puzzles with 16 or fewer clues cannot have only one solution.

What about this puzzle?

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More messages from your neighbours
2 days ago

Alzheimer's (scam??)

Gabriel from Blockhouse Bay

Did the Test 89pts. Test results were to be comprehensive. But was only a Certificate with Point score, that was all? Then would not accept my email and password?! Missing something? Thank you

10 days ago

Got more greens than you know what to do with? 🥦🌱🥕

The Team from Neighbourly.co.nz

Whether it’s a courgette takeover or a feijoa frenzy, don’t let those garden gems go to waste!

Our suggestion to you: Did you know you can grate and freeze excess courgettes to use in chocolate cake later? It sounds a bit dodgy, but it makes the cake incredibly moist ... and hey, it counts as a serving of veg, right? 🍫

What’s your go-to move for a bumper harvest? Drop your best "glut" recipes or preservation hacks in the comments below! 👇

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5 hours ago

has anyone got some pond/oxygen weed

Anna from Titirangi

I'm too late for tadpoles but am hoping someone might sell me some of their oxygen weed or any sort of aquatic pond plant??? Maybe tadpoles as well?