The New Sudoku Players' Forum

by **rjamil** » Fri Dec 22, 2017 2:11 pm

Hi StrmCkr,

StrmCkr wrote:another way for these to work, that isn't covered..

Code: Select all
| . . . | a . . | . . . | | . ab . | a* ab . | . . . | | . . . | a . . | . . . | -------------------------------- | . . . | / . . | . . . | | . -a . | a . . | . . . | | . . . | / . . | . . . | -------------------------------- | . . . | / . . | . . . | | . . . | / . . | . . . | | . . . | / . . | . . . |
{note the * cell is also removed}

Allow me to compare above W-Wings exemplar with Grouped 2-String Kite as follows:

Code: Select all: --------------+-------------+----------- --------------+-------------+----------- . +A . | . . . | . . . . +A . | . . . | . . . . -A AB | . . . | . AB . +A / +A | / / / | / +A / . +A . | . . . | . . . . +A . | . . . | . . . --------------+-------------+----------- --------------+-------------+----------- . / . | . . . | . . . . / . | . . . | . . . . / . | . . . | . . . . / . | . . . | . . . . / . | . . . | . . . . / . | . . . | . . . --------------+-------------+----------- --------------+-------------+----------- . / . | . . . | . . . . / . | . . . | . . . . +A . | . . . | . -A . . +A . | . . . | . -A . . / . | . . . | . . . . / . | . . . | . . . --------------+-------------+----------- --------------+-------------+-----------

I think, right hand side exemplar superseded the left hand side one. How? Allow me to give my analyses as follows:
In left hand side exemplar, if r2c38 contain naked pair, then it means that it also creates both digits "A" and "B" strong links in r2.
And, if we omit "B" digit for a moment and concentrate on digit "A" pattern, then we have exactly the same pattern as per right hand side exemplar (after naked pair move), which is Grouped 2-String Kite.

Well, if there are any specific puzzles available that will have the above W-Wings pattern, then I will check the same with my solver for if it will also detect as Grouped 2-String Kite or not.

Added: What's in my mind, is that, after doing such special case of W-Wings (as shown in left hand side), the puzzle state still need to exclude naked pair, i.e., in both the cases, it will have to exclude naked pair from r2 either before or after in order to solve the puzzle. (I am not in a position to challenge anything.)

R. Jamil

by **StrmCkr** » Sat Apr 18, 2020 1:25 am

missing exemplar of the Type E: Ring from the first post

Code: Select all: +----------------+-------------------+---------------+ | . . . | . -12 . | . . . | | . -12 . | . (12) . | . . . | | . . . | . -12 . | . . . | +----------------+-------------------+---------------+ | . . . | / (12) / | . . . | | -12 (12) -12 | (12) (-12) (12) | -12 -12 -12 | | . . . | / (12) / | . . . | +----------------+-------------------+---------------+ | . . . | . -12 . | . . . | | . . . | . -12 . | . . . | | . . . | . -12 . | . . . | +----------------+-------------------+---------------+

by **rjamil** » Mon Mar 22, 2021 2:22 pm

Hi all.

While i am trying to study W-Ring move, found very nice example puzzle here.

Code: Select all: ..82.1..6..95...2..5..7..3..25.8...4.6.....7.8...4.26..1..5..8..8...93..4..7.85..

After basic moves, reached following puzzle pencilmark state:

Code: Select all: +---------------+----------------+--------------+ | 37 347 8 | 2 9 1 | 47 5 6 | | 16 47 9 | 5 36 346 | 147 2 8 | | 126 5 12 | 8 7 46 | 149 3 19 | +---------------+----------------+--------------+ | 37 2 5 | 36 8 67 | 19 19 4 | | 19 6 4 | 139 12 25 | 8 7 35 | | 8 379 13 | 139 4 57 | 2 6 35 | +---------------+----------------+--------------+ | 29 1 237 | 4 5 23 | 6 8 279 | | 5 8 267 | 16 126 9 | 3 4 127 | | 4 39 236 | 7 1236 8 | 5 19 129 | +---------------+----------------+--------------+

Found two W-Ring moves as follows:

1) W-Ring: 12 @ r3c3 r5c5 ERI 1 @ b4r5c3 (or SL Column 1 between 1 @ r23c1 and 1 @ r5c1; or SL Row 6 between 1 @ r6c4 and 1 @ r6c3)
between ERI 2 @ b7r7c3 and ERI 2 @ b8r7c5 => -1 @ r5c4 => -2 @ r7c3

Code: Select all: +------------------+------------------+--------------+ | 37 347 8 | 2 9 1 | 47 5 6 | | 16 47 9 | 5 36 346 | 147 2 8 | | 126 5 (12) | 8 7 46 | 149 3 19 | +------------------+------------------+--------------+ | 37 2 5 | 36 8 67 | 19 19 4 | | [1]9 6 (4) | 39-1 (12) 25 | 8 7 35 | | 8 379 [1]3 | 139 4 57 | 2 6 35 | +------------------+------------------+--------------+ | [2]9 1 (37-2) | 4 (5) [2]3 | 6 8 279 | | 5 8 [2]67 | 16 1[2]6 9 | 3 4 127 | | 4 39 [2]36 | 7 1[2]36 8 | 5 19 129 | +------------------+------------------+--------------+

2) W-Ring: 19 @ r3c9 r5c1 ERI 1 @ b1r3c1 (or SL Row 2 between 1 @ r2c7 and 1 @ r2c1 or SL Column 3 between 1 @ r6c3 and 1 @ r3c3)
SL Row 7 between 9 @ r7c9 and 9 @ r7c1 => -1 @ r3c17 => -9 @ r9c9

Code: Select all: +------------------+----------------+----------------+ | 37 347 8 | 2 9 1 | 47 5 6 | | [1]6 47 9 | 5 36 346 | 147 2 8 | | (26-1) 5 [1]2 | 8 7 46 | 49-1 3 (19) | +------------------+----------------+----------------+ | 37 2 5 | 36 8 67 | 19 19 4 | | (19) 6 4 | 139 12 25 | 8 7 35 | | 8 379 13 | 139 4 57 | 2 6 35 | +------------------+----------------+----------------+ | 2(9) 1 237 | 4 5 23 | 6 8 27(9) | | 5 8 267 | 16 126 9 | 3 4 127 | | 4 39 236 | 7 1236 8 | 5 19 12-9 | +------------------+----------------+----------------+

R. Jamil

by **rjamil** » Thu Apr 01, 2021 2:03 am

Hi all,

Trying to build W-Ring move exemplars of all possible combinations of Strong Links & Weaklinks as follows:

Code: Select all: *W-Ring Type 1 (multiple exemplars, multiple removals) *Lines Reduced Line ---------------+---------------+--------------- ---------------+---------------+--------------- 01)-Y -YZ -Y | . . . | . -Y . 02)-Y -YZ -Y | . . . | . -Y . -Y YZ -Y | . . . | . -YZ . -Y YZ -Y | . . . | . -YZ . +y +y-Z +y | / / / | / +Y / / +Y-Z / | / / / | / +Y / ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . . . | . -Y . . -YZ . | . . . | . -Y . . -Z . | . . . | . -Y . . -YZ . | . . . | . -Y . . -Z . | . . . | . -Y . . -YZ . | . . . | . -Y . ---------------+---------------+--------------- ---------------+---------------+--------------- / +Z / | / / / | +z +z-Y +z / +Z-Y / | / / / | +z +z-Y +z . -YZ . | . . . | -Z YZ -Z . -YZ . | . . . | -Z YZ -Z . -Z . | . . . | -Z -YZ -Z . -YZ . | . . . | -Z -YZ -Z ---------------+---------------+--------------- ---------------+---------------+--------------- *Reduced Lines ERI+Line ---------------+---------------+--------------- ---------------+---------------+--------------- 03)-Y -YZ -Y | . . . | . -YZ . 04)-Y -YZ -Y | . . . | . -Y . -Y YZ -Y | . . . | . -YZ . -Y YZ -Y | . . . | . -YZ . / +Y-Z / | / / / | / +Y-Z / +y +y-Z +y | / / / | / +Y / ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -YZ . . -Z . | . . . | . -Y . . -YZ . | . . . | . -YZ . . -Z . | . . . | . -Y . . -YZ . | . . . | . -YZ . . -Z . | . . . | . -Y . ---------------+---------------+--------------- ---------------+---------------+--------------- / +Z-Y / | / / / | / +Z-Y / / +z / | . . . | . -Y . . -YZ . | . . . | -Z YZ -Z +z -YZ +z | -Z -Z -Z | -Z YZ -Z . -YZ . | . . . | -Z -YZ -Z / +z / | . . . | . -Y . ---------------+---------------+--------------- ---------------+---------------+--------------- ERI+Reduced Line Lines ---------------+---------------+--------------- ---------------+---------------+--------------- 05)-Y -YZ -Y | . . . | . -Y . 06)-Y -YZ -Y | . . . | . -YZ . -Y YZ -Y | . . . | . -YZ . -Y YZ -Y | . . . | . -YZ . / +Y-Z / | / / / | / +Y / +y +y-Z +y | / / / | / +Y-Z / ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -Y . . -Z . | . . . | . -YZ . . -YZ . | . . . | . -Y . / +Z / | / / / | / +Z-Y / . -YZ . | . . . | . -Y . . -Z . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- / +z-Y / | . . . | . -Y . . -Z . | . . . | . -YZ . +z -YZ +z | -Z -Z -Z | -Z YZ -Z . -YZ . | . . . | . YZ . / +z-Y / | . . . | . -Y . . -Z . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- *Reduced Line ERI+Line ---------------+---------------+--------------- ---------------+---------------+--------------- 07)-Y -YZ -Y | . . . | . -YZ . 08)-Y -YZ -Y | . . . | . -YZ . -Y YZ -Y | . . . | . -YZ . -Y YZ -Y | . . . | . -YZ . / +Y-Z / | / / / | / +Y-Z / +y +y-Z +y | / / / | / +Y-Z / ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -YZ . / +z / | . . . | / +z-Y / / +Z-Y / | / / / | / +Z-Y / +z -Z +z | . . . | +z -YZ +z . -YZ . | . . . | . -YZ . / +z / | . . . | / +z-Y / ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -YZ . . -Z . | . . . | . -YZ . . -YZ . | . . . | . YZ . . -YZ . | . . . | . YZ . . -YZ . | . . . | . -YZ . . -Z . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- *ERI+Reduced Line ERI ---------------+---------------+--------------- ---------------+---------------+--------------- 09)-Y -YZ -Y | . . . | . -YZ . 10) . -Z . | . . . | / +y / -Y YZ -Y | . . . | . -YZ . -Y YZ -Y | -Y -Y -Y | +y -YZ +y / +Y-Z / | / / / | / +Y-Z / . -Z . | . . . | / +y / ---------------+---------------+--------------- ---------------+---------------+--------------- / +z-Y / | . . . | / +z-Y / . -Z . | . . . | . -Y . +z -YZ +z | . . . | +z -YZ +z . -Z . | . . . | . -Y . / +z-Y / | . . . | / +z-Y / . -Z . | . . . | . -Y . ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -YZ . / +z / | . . . | . -Y . . -YZ . | . . . | . YZ . +z -YZ +z | -Z -Z -Z | -Z YZ -Z . -YZ . | . . . | . -YZ . / +z / | . . . | . -Y . ---------------+---------------+--------------- ---------------+---------------+--------------- *ERI+Line ERI ---------------+---------------+--------------- ---------------+---------------+--------------- 11) . -Z . | . . . | / +y-Z / 12) . -Z . | . . . | / +y-Z / -Y YZ -Y | -Y -Y -Y | +y -YZ +y -Y YZ -Y | -Y -Y -Y | +y -YZ +y . -Z . | . . . | / +y-Z / . -Z . | . . . | / +y-Z / ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . . . | . -YZ . / +z / | . . . | / +z-Y / / +Z / | / / / | / +Z-Y / +z -Z +z | . . . | +z -YZ +z . -Z . | . . . | . -YZ . / +z / | . . . | / +z-Y / ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . . . | . -YZ . . -Z . | . . . | . -YZ . . -YZ . | . . . | . YZ . . -YZ . | . . . | . YZ . . -Z . | . . . | . -YZ . . -Z . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- *Lines ERI+Line ---------------+---------------+--------------- ---------------+---------------+--------------- 13) . -Z . | . / . | . -Z . 14) . -Z . | . / . | . -Z . -Y YZ -Y | -Y +Y -Y | -Y -YZ -Y -Y YZ -Y | -Y +Y -Y | -Y -YZ -Y . -Z . | . / . | . -Z . . -Z . | . / . | . -Z . ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . / . | . -Z . / +z / | . / . | / +z / / +Z / | / / / | / +Z / +z -Z +z | . / . | +z -Z +z . -Z . | . / . | . -Z . / +z / | . / . | / +z / ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . / . | . -Z . . -Z . | . / . | . -Z . -Y -YZ -Y | -Y +Y -Y | -Y YZ -Y -Y -YZ -Y | -Y +Y -Y | -Y YZ -Y . -Z . | . / . | . -Z . . -Z . | . / . | . -Z . ---------------+---------------+--------------- ---------------+---------------+--------------- *ERI ---------------+---------------+--------------- 15) . -Z . | / +y / | . -Z . -Y YZ -Y | +y -Y +y | -Y -YZ -Y . -Z . | / +y / | . -Z . ---------------+---------------+--------------- / +z / | . . . | / +z / +z -Z +z | . . . | +z -Z +z / +z / | . . . | / +z / ---------------+---------------+--------------- . -Z . | / +y / | . -Z . -Y -YZ -Y | +y -Y +y | -Y YZ -Y . -Z . | / +y / | . -Z . ---------------+---------------+--------------- *W-Ring Type 2 (multiple exemplars, multiple removals) *Lines Reduced Line ---------------+---------------+--------------- ---------------+---------------+--------------- 01)-YZ YZ -YZ | . . . | -YZ -YZ -YZ 02)-YZ YZ -YZ | . . . | -YZ -YZ -YZ +yz +yz +yz | / / / | +yz +yz +yz +y/ +yZ +y/ | / / / | +yz +yz +yz -YZ -YZ -YZ | . . . | -YZ YZ -YZ -YZ -YZ -YZ | . . . | -YZ YZ -YZ ---------------+---------------+--------------- ---------------+---------------+--------------- . . . | . . . | . . . . -Z . | . . . | . . . . . . | . . . | . . . . -Z . | . . . | . . . . . . | . . . | . . . . -Z . | . . . | . . . ---------------+---------------+--------------- ---------------+---------------+--------------- . . . | . . . | . . . . -Z . | . . . | . . . . . . | . . . | . . . . -Z . | . . . | . . . . . . | . . . | . . . . -Z . | . . . | . . . ---------------+---------------+--------------- ---------------+---------------+--------------- *Reduced Lines Reduced Lines ---------------+---------------+--------------- ---------------+---------------+--------------- 03)-YZ YZ -YZ | . . . | -YZ -YZ -YZ 04)-YZ YZ -YZ | . . . | -YZ -YZ -YZ +y/ +yZ +y/ | / / / | /+z +Yz /+z / +YZ / | / / / | / +YZ / -YZ -YZ -YZ | . . . | -YZ YZ -YZ -YZ -YZ -YZ | . . . | -YZ YZ -YZ ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . . . | . -Y . . -YZ . | . . . | . -YZ . . -Z . | . . . | . -Y . . -YZ . | . . . | . -YZ . . -Z . | . . . | . -Y . . -YZ . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . . . | . -Y . . -YZ . | . . . | . -YZ . . -Z . | . . . | . -Y . . -YZ . | . . . | . -YZ . . -Z . | . . . | . -Y . . -YZ . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- *Box+Line Box+Reduced Line ---------------+---------------+--------------- ---------------+---------------+--------------- 05)-YZ YZ -YZ | +y +y +y | -YZ -YZ -YZ 06)-YZ YZ -YZ | +y +y +y | -YZ -YZ -YZ +z +z +z | / / / | +z +z +z / +Z / | / / / | +z +z +z -YZ -YZ -YZ | +y +y +y | -YZ YZ -YZ -YZ -YZ -YZ | +y +y +y | -YZ YZ -YZ ---------------+---------------+--------------- ---------------+---------------+--------------- . . . | . . . | . . . . -Z . | . . . | . . . . . . | . . . | . . . . -Z . | . . . | . . . . . . | . . . | . . . . -Z . | . . . | . . . ---------------+---------------+--------------- ---------------+---------------+--------------- . . . | . . . | . . . . -Z . | . . . | . . . . . . | . . . | . . . . -Z . | . . . | . . . . . . | . . . | . . . . -Z . | . . . | . . . ---------------+---------------+--------------- ---------------+---------------+--------------- *Box+Reduced Line Lines ---------------+---------------+--------------- ---------------+---------------+--------------- 07)-YZ YZ -YZ | +y +y +y | -YZ -YZ -YZ 08)-Z YZ -Z | . . . | -Z -YZ -Z / +Z / | / / / | / +Z / +z +z-Y +z | / / / | +z +z-Y +z -YZ -YZ -YZ | +y +y +y | -YZ YZ -YZ -Z -YZ -Z | . . . | -Z YZ -Z ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . . . | . -Z . . -Y . | . . . | . -Y . . -Z . | . . . | . -Z . . -Y . | . . . | . -Y . . -Z . | . . . | . -Z . . -Y . | . . . | . -Y . ---------------+---------------+--------------- ---------------+---------------+--------------- . -Z . | . . . | . -Z . . -Y . | . . . | . -Y . . -Z . | . . . | . -Z . / +Y / | / / / | / +Y / . -Z . | . . . | . -Z . . -Y . | . . . | . -Y . ---------------+---------------+--------------- ---------------+---------------+--------------- *Reduced Line Reduced Line ---------------+---------------+--------------- ---------------+---------------+--------------- 09)-Z YZ -Z | . . . | -Z -YZ -Z 10)-Z YZ -Z | . . . | -Z -YZ -Z / +Z-Y / | / / / | +z +z-Y +z / +Z / | / / / | / +Z / -Z -YZ -Z | . . . | -Z YZ -Z -YZ -YZ -YZ | +y +y +y | -YZ YZ -YZ ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -Y . . -YZ . | . . . | . -YZ . . -YZ . | . . . | . -Y . . -YZ . | . . . | . -YZ . . -YZ . | . . . | . -Y . . -YZ . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -Y . . -YZ . | . . . | . -YZ . / +Y-Z / | / / / | / +Y / / +Y-Z / | / / / | / +Y-Z / . -YZ . | . . . | . -Y . . -YZ . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- *ERI+Line ERI+Reduced Line ---------------+---------------+--------------- ---------------+---------------+--------------- 11)-Z YZ -Z | . . . | -Z -YZ -Z 12)-Z YZ -Z | . . . | -Z -YZ -Z +z +z-Y +z | / / / | +z +z-Y +z / +Z-Y / | / / / | +z +z-Y +z -Z -YZ -Z | . . . | -Z YZ -Z -Z -YZ -Z | . . . | -Z YZ -Z ---------------+---------------+--------------- ---------------+---------------+--------------- . -Y . | . . . | . -Y . . -YZ . | . . . | . -Y . . -Y . | . . . | . -Y . . -YZ . | . . . | . -Y . . -Y . | . . . | . -Y . . -YZ . | . . . | . -Y . ---------------+---------------+--------------- ---------------+---------------+--------------- / +y / | . . . | / +y / / +y-Z / | . . . | / +y / +y -Y +y | . . . | +y -Y +y +y -YZ +y | . . . | +y -Y +y / +y / | . . . | / +y / / +y-Z / | . . . | / +y / ---------------+---------------+--------------- ---------------+---------------+--------------- *ERI+Reduced Line Boxes ---------------+---------------+--------------- ---------------+---------------+--------------- 13)-Z YZ -Z | . . . | -Z -YZ -Z 14)-YZ YZ -YZ | +yz +yz +yz | -YZ -YZ -YZ / +Z-Y / | / / / | / +Z-Y / . . . | / / / | . . . -Z -YZ -Z | . . . | -Z YZ -Z -YZ -YZ -YZ | +yz +yz +yz | -YZ YZ -YZ ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -YZ . . . . | . . . | . . . . -YZ . | . . . | . -YZ . . . . | . . . | . . . . -YZ . | . . . | . -YZ . . . . | . . . | . . . ---------------+---------------+--------------- ---------------+---------------+--------------- / +y-Z / | . . . | / +y-Z / . . . | . . . | . . . +y -YZ +y | . . . | +y -YZ +y . . . | . . . | . . . / +y-Z / | . . . | / +y-Z / . . . | . . . | . . . ---------------+---------------+--------------- ---------------+---------------+--------------- *Box+Line ERI+Box ---------------+---------------+--------------- ---------------+---------------+--------------- 15)-Z YZ -Z | +z +z +z | -Z -YZ -Z 16)-Z YZ -Z | +z +z +z | -Z -YZ -Z . -Y . | / / / | . -Y . . -Y . | / / / | . -Y . -Z -YZ -Z | +z +z +z | -Z YZ -Z -Z -YZ -Z | +z +z +z | -Z YZ -Z ---------------+---------------+--------------- ---------------+---------------+--------------- . -Y . | . . . | . =Y . . -Y . | . . . | . =Y . . -Y . | . . . | . =Y . . -Y . | . . . | . =Y . . -Y . | . . . | . -Y . . -Y . | . . . | . =Y . ---------------+---------------+--------------- ---------------+---------------+--------------- . -Y . | . . . | . -Y . / +y / | . . . | / +y / / +Y / | / / / | / +Y / +y -Y +y | . . . | +y -Y +y . -Y . | . . . | . -Y . / +y / | . . . | / +y / ---------------+---------------+--------------- ---------------+---------------+--------------- *Lines ERI+Line ---------------+---------------+--------------- ---------------+---------------+--------------- 17) . YZ . | . . . | . -YZ . 18) . YZ . | . . . | . -YZ . . -YZ . | . . . | . -YZ . . -YZ . | . . . | . -YZ . . -YZ . | . . . | . YZ . . -YZ . | . . . | . YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -YZ . . -YZ . | . . . | . -YZ . / +Z-Y / | / / / | / +Z-Y . . -YZ . | . . . | . -YZ . . -YZ . | . . . | . -YZ . . -YZ . | . . . | . -YZ . ---------------+---------------+--------------- ---------------+---------------+--------------- . -YZ . | . . . | . -YZ . / +y-Z / | . . . | / +y-Z / / +Y-Z / | / / / | / +Y-Z / +y -YZ +y | . . . | +y -YZ +y . -YZ . | . . . | . -YZ . / +y-Z / | . . . | / +y-Z / ---------------+---------------+--------------- ---------------+---------------+--------------- *ERI ---------------+---------------+--------------- 19) . YZ . | . . . | . -YZ . . -YZ . | . . . | . -YZ . . -YZ . | . . . | . YZ . ---------------+---------------+--------------- / +z-Y / | . . . | / +z-Y / +z -YZ +z | . . . | +z -YZ +z / +z / | . . . | / +z-Y / ---------------+---------------+--------------- / +y-Z / | . . . | / +y-Z / +y -YZ +y | . . . | +y -YZ +y / +y-Z / | . . . | / +y-Z / ---------------+---------------+---------------

R. Jamil

The New Sudoku Players' Forum

Two definitions of W-Wing, terminology question

Re: Two definitions of W-Wing, terminology question

Re: Two definitions of W-Wing, terminology question

Very nice W-Ring move example

Re: Two definitions of W-Wing, terminology question