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  Topic: tough one
Koala

Replies: 18
Views: 77033

PostForum: Other puzzles   Posted: Tue Mar 29, 2011 3:09 pm   Subject: tough one
Asellus

I am so happy to learn so many things from you. I just wonder our posts may be off the topic “tough one” and will be banned anytime. I don’t know in what way I can get in touch with you aga ...
  Topic: tough one
Koala

Replies: 18
Views: 77033

PostForum: Other puzzles   Posted: Tue Mar 29, 2011 4:52 am   Subject: tough one
Hi Asellus,

Thank you so much for your helpful response! First, I agree that once a device is set up with logic we need not mention “if-then” anymore. Secondly, this is the first time I learn the t ...
  Topic: 27March VH
Koala

Replies: 4
Views: 22945

PostForum: Daily Sudoku puzzles   Posted: Mon Mar 28, 2011 5:35 pm   Subject: 27March VH
A method without using any known technique---Yellow Zone Strategy
After basics:
+-----------+----------------+------------+
| 4 56Y 3 | 1 5*9^ 7 | 2 69Y 8 |
| 5^*6 7 9 | 2 3458 ...
  Topic: tough one
Koala

Replies: 18
Views: 77033

PostForum: Other puzzles   Posted: Mon Mar 28, 2011 7:05 am   Subject: tough one
Hi Asellus

Asellus wrote :
There is a bit too much "if this is true then that happens" in this YZ-method concept for my taste.

Thanks for your opinion. Yet I think in any logical reas ...
  Topic: tough one
Koala

Replies: 18
Views: 77033

PostForum: Other puzzles   Posted: Sun Mar 27, 2011 8:45 am   Subject: tough one
Daj95376 and Keith
Thank you so much for giving me an immediate and helpful response. First, Daj95376 is so nice and clever to let me know a better way to get r3c7<>4. Please take a look at my ...
  Topic: tough one
Koala

Replies: 18
Views: 77033

PostForum: Other puzzles   Posted: Sun Mar 27, 2011 4:12 am   Subject: tough one
Gary Torborg

The logic : r3c7=4 => r9c7<4>r2c9=78,

Should be replaced as "The logic : r3c7=4 => r9c7<>4;"(and r3c7=4=>r2c9=78.)
  Topic: tough one
Koala

Replies: 18
Views: 77033

PostForum: Other puzzles   Posted: Sun Mar 27, 2011 3:50 am   Subject: tough one
Gary Torborg
(Continued)

The logic : r3c7=4 => r9c7<4>r2c9=78,
r3c7=4 =>r3c1=6=>r1c3=157=>(a naked triple 157 in box 1)=>r2c2=39=>(a naked pair 39 in row2)=>r2c4=78=& ...
  Topic: tough one
Koala

Replies: 18
Views: 77033

PostForum: Other puzzles   Posted: Sun Mar 27, 2011 3:46 am   Subject: tough one
Gary Torborg
I totally agree with your point stated in the other discussion “I disagree that any puzzles have no solution other than guessing”. At this discussion, I don’t think daj95376’s techniqu ...
 
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