|Joined: 21 Apr 2010|
|Posted: Wed Apr 21, 2010 11:58 am Post subject: An observed variation of multivalue tuple chain
|excuse me if I am using wrong terminology in my first post here and mentioning something spoken of a thousand times please.... (and I am an everyday Excel user so I'll use Excel ColumnRow notation)
What is this chain pattern called?
In solving MX926 I was looking for so-called multi-valued chains...
and I came across a chain from D7--> E4 which was 52-26-69-94-45-52
ending in the wrong parity for usual MV chain; but the neighbouring cell of D7 (E7) had candidates 258 and the 2's in row 7 were a tuple too...
So if D7 is a 5 there is not 2 in row 7 therefore D7 = 2 and the whole chain follows.
This requires that the tuple Chain end in the same candidate as that of the first cell in the chain, and connects orthogonally ... so that both candidates are eliminated. By extension if there were enough right-handed 2's in the chain the pattern could extend to connect with a three-tuple or a fourtuple ... of 2's
eg if we had S8 with D7=25, E7=258, F9=258
and a chain like 52-26-69-94-45-52-27-72 hitting the two 258's we still eliminate D7=5 because S8 has no viable 2's if D7=5
What is this technique called?
C: A B C D E F
R4: 49 - 45 - 25 69
R5: - - - 59 - -
R6: 58 - - 26 - -
R7: - 48 46 25 258 -
R8: - - 69 69 - -
R9: - 89 - - 58
Since the D7 was eliminated I guess there must be a genuine MV-Chain and in fact there is from E9-->58-89-96-69-95 which also eliminates D7=5[/code][/b]. Will this usually/always be the case?