The Griddle

Puzzle #435: Trickle Down Sudoku Grab Bag

Posted February 7, 2010

Sudoku X, greater-than symbols, differences, sums, and shapes come together in this set of 9 trickle-down (a.k.a. consecutive) sudoku puzzles!

PDF

Comments

mathgrant • 02/07/10 4:05 pm

Avatar of mathgrant

It's easy to skip the first puzzle -- the numbers in the left-most column of the second puzzle add up to 15, the second and third numbers add up to 3 (as per the given sum), and the fourth and fifth add up to 9, so the remaining number at the top is 15-3-9=3.

Unfortunately, the second puzzle is broken; you cannot satisfy the two 8 regions at the same time, even ignoring the rest of the puzzle.

David Millar • 02/07/10 4:19 pm

Avatar of David Millar

I realize that some of the sequence parts can be skipped, but they may help some of the puzzlers looking for easier fare.

As for the 8 regions, I promise some day I will learn basic arithmetic. In the meantime, please accept this fix: the vertical 8 should be a 7. Uploading the PDF again now...

Anonymous Puzzler • 02/07/10 5:16 pm

Avatar of Anonymous Puzzler

Thanks for fixing that. :)

It's been interesting to explore this puzzle and see what sequence breaks are possible. In particular, the final puzzle can be solved without any givens -- which is good because there are no givens, just four outputs. (I think they are supposed to have dotted black outlines, not orange ones! :) )

David Millar • 02/07/10 5:19 pm

Avatar of David Millar

Doh! I'm really having a bad time with this puzzle. Posted the correct shape designs now. Thanks again!

Boomer • 02/07/10 6:53 pm

Avatar of Boomer

I hate to tell you you've got another error, but as written there is no possible solution to puzzle 8. I think you may have reversed the up and down inputs.

David Millar • 02/07/10 7:10 pm

Avatar of David Millar

Fixed that part now too! Good call on the inputs by the way.

Leave Your Comment

All the cool kids have a Gravatar.
Row 1: 1, 2. Row 2: blank, 1.
Prove you're a human:
To leave a comment, solve this 2x2 sudoku and place the answer below.

Don't Miss New Puzzles!

RSS Feed Fediverse Facebook
The Griddle is free of ads and trackers. Support Dave via Patreon, PayPal, or a kind e-mail.