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Unclear Sudoku #5 Rules

The instruction booklet for Sudoku Round 5 is pretty unclear. For Battenburg, the evens and odds in the 2x2 are going to be diagonal from each other? For Chess Kings, I need clarification on whether a black king and a white king can touch each other or not. For Unicorn, I think I understand it but it would be nice to get confirmation...if there is a 9, all of the cells that connect to it via a knight's move have to be different digits? So, it can connect to another 9 (unlike antiknight) but it wouldn't be able to connect to more than one 9?

Thanks!

TiiT's picture

Hi
Thank you for your questions, they are very good. Some of them were actually a bit what I expected. So I explain them in different posts so it's easy to follow:

So in Battenburg, the special sign is given if odd and even digits are forming a chessboard pattern. Yes, it means evens are in one diagonal and odds are in other diagonal

Examples of battenburg formations:
EO
OE

OE
EO

If there is no battenburg sign, then there cannot be such formations in this 2x2 area.

I hope it's clear now.

Tiit

TiiT's picture

Black king and white king cannot touch each other. Also 2 kings of the same colour cannot touch each other.

There are just 2 numbers which are representing kings. They cannot touch each other and you need to figure out yourself which 2 digits are these kings.

TiiT's picture

You are correct. One 9 CAN be connected via chess knight's move to another 9.
But only with one 9, no more.

There is also such case in the example puzzle: R3C5 and R2C7 are both 9 and they can attack each other via chess knight's move.

Thanks for responding - it all makes sense now