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*-----------------------------------------------------------------------------*
| 1245 6 1257 | 8 35 345 | 1457 457 9 |
| 459 489 589 | 7 6 1 | 2 3458 3458 |
| 145 B1478 3 | 9 2 45 | 14567 4578 X145678 |
|-------------------------+-------------------------+-------------------------|
| 6 5 4 | 3 8 2 | 179 79 17 |
| 8 B379 79 | 6 1 A57 | 45 345 2 |
| 123 123 127 | 4 57 9 | 8 6 35 |
|-------------------------+-------------------------+-------------------------|
| 259 289 2589 | 1 4 A67 | 3 *5789 *5678 |
| 134 134 6 | 5 379 8 | 49 2 *47 |
| 7 34 589 | 2 39 36 | 4569 1 4568 |
*-----------------------------------------------------------------------------*
*=marks the "hinge" or "ER complement"
A=conjugate 7's
B=conjugate 7's
X= 7 can be eliminated
Or it can be looked at as a partial swordfish which the ER has the possibility of making the elimination or turning the partial swordfish into an x-wing(sashimi?) which makes the elimnation. This same rule would work with higher fish or grouped strong links
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Multiple strong links:
*-----------*
|...|o..|.x.|
|.o.|...|..x|
|.o.|.o.|..x|
|---+---+---|
|...|o..|.+a|
|...|.o.|.a+|
|...|...|...|
|---+---+---|
|...|...|...|
|...|...|...|
|...|...|...|
*-----------*
o= candidates
a=candidates forming ER
+=possible ERI's
x=eliminations
Where there can be(must be) other candidates present as long as they don't destroy the strong links or empty rectangle.
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Grouped strong link:
*-----------*
|..o|...|..x|
|...|...|...|
|oo.|.o.|..x|
|---+---+---|
|...|...|..a|
|...|.o.|.a+|
|...|...|..a|
|---+---+---|
|...|...|...|
|...|...|...|
|...|...|...|
*-----------*
o= candidates
a=candidates forming ER
+=possible ERI's
x=eliminations
Where there can be(must be) other candidates present as long as they don't destroy the strong links or empty rectangle.
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Partial Jellyfish:
*-----------*
|o..|o..|.oo|
|o.o|o..|oo.|
|.b.|.b.|..x|
|---+---+---|
|..o|o..|..a|
|..o|.bb|.a+|
|o..|...|..a|
|---+---+---|
|.b.|o..|o.x|
|.b.|o.b|.ox|
|o..|o..|.o.|
*-----------*
a=candidates that form the ER
+=ERI
b=candidates making a partial jellyfish
o=other candidates(no other candidates are present)
x=eliminations
There is a finned fish that makes one of the eliminations, and I suppose that people may find mistakes in this post and all eliminations given could be done by other finned fish or another technique, but I think ER's are easy to spot so are probably useful.
The reason it works is that the candidates either make the eliminations directly, or eliminate a "rib" of the partial fish making it a legitimate lower fish which in turn makes the eliminations.
I refer to the "rib" of the fish as being the line that the eliminations occur on.
Hopefully people can find examples where this is useful. It seems that any elimination done by this technique could potentially be done another way, but I think this may be easier to spot because you just spot the ER and then check for strong links or partial fish to make any eliminations.
So the summary is... " An ERI that is on the rib of a partial fish makes eliminations along the other ribs of the partial fish".
Any thoughts?
