WPF Sudoku GP

Information and discussion on Puzzle Competitions
Feadoor
Posts: 104
Joined: Thu 17 May, 2018 7:08 am

Re: WPF Sudoku GP

Post by Feadoor » Wed 24 Jul, 2019 6:16 am

Here you go James: viewtopic.php?f=5&t=1697

Puzzle_Maestro
Posts: 23
Joined: Mon 11 Mar, 2019 5:23 pm

Re: WPF Sudoku GP

Post by Puzzle_Maestro » Wed 24 Jul, 2019 12:41 pm

Many congratulations to Sam for the excellent result!

I agree that the symmetric products sum was a good inclusion: I thought it shouldn't have been worth anywhere near 72 points, because as soon as you fill in the first 'box' the rest solves easily.

Seeing a finned swordfish in a competitive scenario is highly impressive. I inserted the puzzle into a sudoku solver, and the solve involved a lot of naked pairs and triples, so the swordfish bypassed a lot of tough logic.

Feadoor
Posts: 104
Joined: Thu 17 May, 2018 7:08 am

Re: WPF Sudoku GP

Post by Feadoor » Wed 24 Jul, 2019 1:41 pm

Puzzle_Maestro wrote:
Wed 24 Jul, 2019 12:41 pm
Seeing a finned swordfish in a competitive scenario is highly impressive.
Some would say "pointless", or "a waste of time". I know that a lot of solvers don't think that such logic has a place in speedsolving.

But I've made the argument before that there are specific types of (finned) fish that are not very difficult to spot if you know you're looking for them. Simon and Mark would have called this one a "Slot Machine", although I find their presentation as a trial-based method less useful than the formulation as a finned swordfish.

detuned
Posts: 1869
Joined: Mon 21 Jun, 2010 2:25 pm
Location: London, UK
Contact:

Re: WPF Sudoku GP

Post by detuned » Wed 24 Jul, 2019 10:04 pm

They're much easier to spot when there are natural partitions in the grid - odd/even being a particularly helpful one as that gives 4/5.

Post Reply