The answer to this riddle sudoku is... bring more than one flashlight!
My solve of "30 Zombies in 20 Minutes" by ZegreS. The third sudoku in his riddle series.
Riddle:
On a dark, moonless night, four friends are escaping a horde of 30 zombies. They come to an old rickety bridge. At most two can cross it at a time and they must use a flashlight to see. They only have one flashlight, so someone must bring it back each time until everyone is across. Shaun takes 1 minute to cross, Liz takes 3, Ed takes 7 and Dianne takes 9. The zombies will get to the bridge in 20 minutes. How can everyone get across in time?
Sudoku:
Normal Sudoku rules apply.
Digits on arrows sum to the circle.
Digits along marked diagonals sum to the given digit.
Each colored row top-to-bottom represents a bridge crossing in order. The people have to get from the left side to the right. Place them on the bridge (arrow) and the banks on either side. People are represented by their crossing time. The sandwich clues to the left indicate the total time after each crossing. They equal the sum of digits between 1 and 9 in their row.
Links to online solving tools:
CtC App: https://tinyurl.com/30zombies
f-puzzles: https://f-puzzles.com/?id=y3kw9njg
This puzzle can also be found on Logic Masters Germany:
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=0008G0
You can find more of ZegreS' puzzles on the Cracking the Cryptic discord server or his Logic Masters Germany page:
https://logic-masters.de/Raetselportal/Benutzer/eingestellt.php?name=zegres
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If you would like to reach out to me you can.
I am BremSter on the CtC discord, or you can email bremster@elindal.net
You can find my puzzles on my Logic Master's Germany profile page.
https://logic-masters.de/Raetselportal/Benutzer/eingestellt.php?name=Bremster
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