Stranger Kings
(Published on 28. February 2022, 23:09 by mith)
Stranger Kings
by Philip Newman (mith) and ryokousha (SlowLarry)
Play on f-puzzles
Play on CTC App
Normal sudoku rules apply.
Cells separated by a king's move cannot contain the same digit.
This puzzle is from a series of "nerd snipe" constructions, originally posted on the CTC fan discord server. It contains only 11 givens, which is the fewest known for the Antiking constraint. I don't believe 10 is possible, but we haven't conclusively proven this.
ryokousha (via computer search) and I (by "hand", using a solver for solution counts only) had arrived independently at a promising arrangement of duplicate digits with few solutions, and finally I was able to modify it to achieve uniqueness. The solve is not too hard, and is a nice illustration of antiking tricks!
by Philip Newman (mith) and ryokousha (SlowLarry)
Play on f-puzzles
Play on CTC App
Normal sudoku rules apply.
Cells separated by a king's move cannot contain the same digit.
This puzzle is from a series of "nerd snipe" constructions, originally posted on the CTC fan discord server. It contains only 11 givens, which is the fewest known for the Antiking constraint. I don't believe 10 is possible, but we haven't conclusively proven this.
ryokousha (via computer search) and I (by "hand", using a solver for solution counts only) had arrived independently at a promising arrangement of duplicate digits with few solutions, and finally I was able to modify it to achieve uniqueness. The solve is not too hard, and is a nice illustration of antiking tricks!
Solution code: Row 2, followed by column 2
Solved by SKORP17, PippoForte, Florian Wortmann, zhergan, Steven R, DVFrank, Raumplaner, efnenu, OutOfMyMindBRB, jchan18, ScatterBrain, Askloomok, jalebc, KNT, manushand, Hecspeed, Elliott810, davidjshort, ... GeorgeTheToad2, Carolin, Jdt112, by81996672, P12345, zrbakhtiar, pepe74287, Gliperal, diziet, dennischen, Yawnus, Krisonium, SudokuExplorer, lmdemasi, Willy Wonka, Grothenlace, jadezki, Mikemerin
Comments
on 17. December 2022, 01:17 by chain.reader
beautiful!
on 1. March 2022, 18:05 by Bankey
Fun puzzle! Thanks, @ Philip Newman and ryokousha :-)
on 1. March 2022, 07:10 by Elliott810
Nice work, guys! Thx:)
