Blade Runner
(Published on 14. March 2025, 23:39 by Kafkapharnaum)
Huge thanks also to chrisj50 for having also tested multiple versions and helped strengthen some core ideas from the first version. dopplperschg
RULES
DOPPELGANGER
– Every row, column, and region must contain the digit 0 always, as well as eight out of the nine digits from 1 to 9 (ie, it will be missing one digit that is not 0).
– No two rows, no two columns, and no two regions may be missing the same digit.
– For each 0 in the grid, the digits missing in its row, its column, and its region must be three different digits.
LOCKOUT LINES
– Digits along a line connecting two diamonds may not be equal or between the digits in the diamonds at the endpoints of that line.
– Digits in two diamonds directly connected by a line must differ by at least 4.
– Lines extending across multiple boxes can contain repeated digits if the other rules allow it.
SOLVING LINKS
Solve on Sudokupad
Solve on Penpa
Solution code: Column 4 (top to bottom)
Comments
on 25. March 2025, 01:47 by bodemeister
@wullemuus
To be fair this puzzle was 100% designed by Kafka and not a co-op. I just tested a couple versions.
on 23. March 2025, 13:45 by wullemuus
Glad about your new cooperation- I really would have missed something without any more DG puzzles ;)!
The lockout lines make it intricate for you have to work for every deduction (nothing else I expect from Bode's influence;)). But the solving path is very narrow and well constructed.. A pleasure as always!
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Thank you for the solve and feedback, glad to see you solve one of these again, and glad also that you enjoyed! The Lockout Lines really are they're own thing eh, haha XD
will likely have another offering in the short term that I hope you will enjoy as well, and meanwhile, I will myself try and solve some of Bode's latest ones! :O
on 17. March 2025, 11:34 by chrisj50
It was a pleasure to test and a very tough challenge. Beautifully logical throughout & cleverly utilised both rule sets:)
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Huge thanks again for all your efforts and feedbacks on this puzzle Chris, and for entering your solve here -- very glad to hear this was all a pleasant experience for you! :D
on 16. March 2025, 11:25 by Las4one
Very nice as always!
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Thank you so much, I'm very glad you liked it, as this was made with a number of specific solvers in mind, of which you were part! :D
on 15. March 2025, 03:30 by bodemeister
Definitely a doozy of a puzzle with a fun break-in, lots of doppelganger logic, and a cool ending. Highly recommend! And thanks for the shoutout. It was a pleasure to test this puzzle! Looking forward to the next one!
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My pleasure for the shoutout, and the least I could do. Now let's hope it'll send some traffic your way and a number of courageous solvers will attempt (and hopefully solve) your puzzles (Doppelgangers or not)!
