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 Post subject: Renban ORC 1
PostPosted: Sun Sep 01, 2019 7:12 pm 
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Grand Master
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Joined: Wed Apr 30, 2008 9:45 pm
Posts: 571
Renban ORC 1

As we are playing around with renban groups I thought to try one on an ORC background.

All cages are good renban groups i.e. they have a set of consecutive non-repeating numbers in any order. I'm thinking about doing one with bad renban groups which may/must have repeats.

To remind you renban is Japanese and means sequence in this context, so the numbers in the cage are consecutive but in any order.

Note that
given the layout the renban groups are NC so very restricted e.g. 1234 is [2413] or [3142] and 12345 has 14 solutions.

Odd Row and Column - ORC - so it is:
ORC: odd rows and columns are 1-9 no repeat; even ones are not (i.e. they can repeat).
NN: no nonets

For all cells:
AK: Anti-King - diagonally adjacent are not equal (of course horizontally and vertically adjacent cells can repeat if in an even row or column)
FNC: Ferz Non-consecutive - diagonally adjacent are not consecutive
NC: horizontally and vertically adjacent cells are not consecutive

I solve these in JSudoku control-right click allows you to remove the row and column constraints. Note recursively solve works but deduce a move is flawed, so if you are using it stop when you get to X-wing as this fails.


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