How to produce puzzles with rare solving methods

Everything about Sudoku that doesn't fit in one of the other sections

How to produce puzzles with rare solving methods

Postby Eioru » Thu Sep 14, 2006 9:50 am

The rare methods but they are easy on difficulty like
Direct Claiming
Direct Hidden Triplet
Unique loops
Naked Quad
Jellyfish
Hidden Quad
Bidirectioal X-Cycles
Bivalue Universal Graves

http://diuf.unifr.ch/people/juillera/Sudoku/InterestingSudokus.html#DirectIntersections
It seems that Direct Claimings do not occur in natural ways.
Eioru
 
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Joined: 16 August 2006

Postby udosuk » Thu Sep 14, 2006 12:19 pm

It seems to me "Direct Pointing" & "Direct Claiming" are just special cases of "Locked Candidates" types 1 & 2 respectively, in which you could find hidden singles immediately... Thus they could be applied without pencilmarks... Not sure why "Direct Claiming" is more unnatural than "Direct Pointing"...

Side Note #1:
Are you busy joining the demonstrations against President Chen? Or are you a pro-Chen supporter instead?:)

Side Note #2:
Wang Chien-Ming of the Yankees is going for his 18th win tomorrow... And also Kuo Hong-Chih of the Dodgers is starting too... Great showing from the Taiwanese pitchers lately...:)
udosuk
 
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