Battleships! - Sudoku
(Eingestellt am 28. März 2021, 06:13 Uhr von JeffWajes)
By Jeff Wajes
You are our navy's finest admiral. We have tracked the enemy fleet to this narrow harbor, and now we need you to pinpoint their locations so that we can sink them for good.
Happy hunting!
Rules
Normal Sudoku rules apply. Digits cannot repeat inside a cage. The small clue in the top left of a cage indicates the sum of the contained digits.
There are exactly five enemy ships. There are two ships that are 3 cells long, and one ship each of lengths 2, 4, and 5. See list below.
Cells in the given cages (green) are land. All other cells (blue) are sea. Ships can only occupy sea cells.
Ships cannot touch each other, not even diagonally.
Each ship acts like a cage with a sum of 15.
Ships are unambiguous, and the negative constraint applies. In other words, any line of 2, 3, 4, or 5 sea cells which sum to 15 MUST be a ship. Similarly, any line of sea cells which cannot be a ship CANNOT sum to 15. This will be important.
Lösungscode: Column 4
Kommentare
am 1. Juli 2021, 16:50 Uhr von Phistomefel
This was a very entertaining puzzle. Thanks a lot, JeffWajes!
am 9. Juni 2021, 22:12 Uhr von DiMono
Nicely done. Thanks for the fun puzzle. I've been toying with my own battleship/sudoku hybrid idea; I can only hope it turns out as nicely as this one.
am 24. Mai 2021, 22:50 Uhr von Zombie Hunter
Missed an early bit of logic that caused me grief. Logic is your friend in this excellent puzzle. Nice construction. Make more.
am 2. Mai 2021, 05:08 Uhr von cristophermoore
Fantastic puzzle! Multiple kinds of reasoning, the negative constraint applying in a bunch of places, a quick break-in but many more insights to be had along the way. Thank you so much!
am 2. Mai 2021, 01:07 Uhr von cristophermoore
Fantastic puzzle! Multiple kinds of reasoning, the negative constraint applying in a bunch of places, a quick break-in but many more insights to be had along the way. Thank you so much!
am 28. März 2021, 22:03 Uhr von fuxia
Fantastic puzzle! Clever use of the negative constraint, I enjoyed this a lot. Thank you.
am 28. März 2021, 19:25 Uhr von Sktx
Very nice idea ! It stays tricky from start to end, and the ruleset is quite clean. I wish I could win my battleships! games with that kind of logical path...
am 28. März 2021, 10:54 Uhr von PixelPlucker
I really enjoyed this! It has a very compelling hook and an enjoyable solution path with some fun challenges.
