The New Sudoku Players' Forum

[novi]

I prefer no guessing Sudoku puzzles but these puzzles are of the very tough brain cramp type. Have fun!

Windmill_Windoku_X_Very_Hard_01

Techniques used to solve: Naked Pair, Hidden Pair, LoL Synchronization, Twin Nonets, Intersection, Hidden Triplet, Mandatory Inclusion, Pointing Pair, Pointing Triplet, Skyscraper, Two String Kite, Finned X-Wing, Generalized X-Wing, Turbot Fish, Empty Rectangle, XY-Wing, XYZ-Wing, Grouped X-Wing, Grouped Turbot Fish

Windmill_Windoku_X_Extremely_Hard_01

Techniques used to solve: Naked Pair, Hidden Pair, LoL Synchronization, Twin Nonets, Intersection, Pointing Pair, Pointing Triplet, Generalized Naked Subset, Skyscraper, Two String Kite, Finned X-Wing, Generalized X-Wing, Turbot Fish, Empty Rectangle, Grouped X-Wing, Grouped Turbot Fish, Grouped Turbot Chain with 5 links, XY-X-Chain up to 3 links, ALS-XZ up to 5 cells

[BryanL]

.
again phew!!!

these things can take some time...

Hidden Text: Show

Code: Select all


upper left

*---*---*---*
|681|395|472|
|753|142|896|
|249|786|135|
*---+---+---*
|168|234|759|
|524|978|613|
|397|651|248|
*---+---+---*
|415|829|367|
|932|467|581|
|876|513|924|
*---*---*---*

upper right

*---*---*---*
|954|216|873|
|712|983|564|
|368|754|912|
*---+---+---*
|145|398|726|
|293|671|458|
|876|542|391|
*---+---+---*
|531|427|689|
|629|835|147|
|487|169|235|
*---*---*---*

lower left

*---*---*---*
|936|125|748|
|827|694|351|
|541|378|692|
*---+---+---*
|395|862|174|
|682|741|935|
|714|953|286|
*---+---+---*
|463|287|519|
|278|519|463|
|159|436|827|
*---*---*---*

lower right

*---*---*---*
|853|962|471|
|642|718|953|
|719|354|268|
*---+---+---*
|285|693|714|
|964|271|385|
|137|845|629|
*---+---+---*
|326|589|147|
|591|427|836|
|478|136|592|
*---*---*---*

central nonet

*---*
|296|
|478|
|135|
*---*