Naoki-Projekt

[fuji]

About Hougan: http://puz.hp.infoseek.co.jp/honkaku/relay.html
(PDF) http://puz.hp.infoseek.co.jp/honkaku/hougan.pdf

I think "Hougan" is a puzzle which is very difficult to understand.
As it's a nice puzzle, I'll try to explain it now.

The following image is the example problem of Naoki's PDF.



Let's start to explain from the answer.

There are 7 blocks.



Now, let's check all relations between the block pairs touching each other.

1-2 AB - ACD
1-4 AB - AC
2-3 ACD - BCD
2-4 ACD ⊃ AC block 2 includes block 4
2-5　 ACD - BCD
3-5 BCD = BCD block 3 and block 5 are same
3-7 BCD - A
4-5 AC - BCD
4-6 AC - AB
5-6 BCD - AB
5-7 BCD - A

So,
the border between block 2 and block 4 is marked as ⊃,
the border between block 3 and block 5 is marked as =.
Others border lines are not marked.

Does this help you understand "Hougan"?
Please feel free to ask any question,

If you think that any problems of PDF has multiple answers, please let me know.