Binary Sudoku
(Published on 24. April 2020, 07:19 by stephane.bura)
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General Rules: Place a digit from 1 to 9 into each cell of the grid so that every row, column and outlined 3x3 region contains each digit exactly once. 16 Unique Binary Cages: Each of the 16 4-cell cages is a unique arrangement of odd and even digits corresponding to the numbers from 0 to 15 in binary. If a digit is even, it represents a 0 bit; if it’s odd, a 1 bit. Binary Sums: Each number on the left of the grid is the sum of the two numbers (from 0 to 15) represented by the cages in this row. Cage ordering: An arrow between two cages point toward the smaller of the two when comparing their binary values. Sums within the Cages: In each of the cages corresponding to the numbers from 1 to 15, it is possible to choose one to four digits that add up to the value of the cage in binary. For instance, on the right are three valid contents for the 9 cage. 10s: If and only if two neighboring digits add up to 10, a black dot separates them. |
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Solution code: Column 3, followed by column 7.
Comments
on 2. September 2025, 19:35 by rich_27
Puzzle links:
https://sudokupad.app/pshhh2qdg1
https://f-puzzles.com/?id=26qfxlu5
I swapped the dots for Xs, given dots generally indicate kropki ratios and Xs are common in XV constraints to indicate the 10s rule.
on 1. January 2025, 03:42 by fahmisack
010101000110100001101001011100110010000001110000011101010111101001111010011011000110010100100000011010010111001100100000011000010110111000100000011000010110001001110011011011110110110001110101011101000110010100100000011001110110010101101101001000010010000001001001001000000111001001100101011000010110110001101100011110010010000001100101011011100110101001101111011110010110010101100100001000000110100101110100001000010010000001001110011011110111010000100000011101000110111101101111001000000110100001100001011100100110010000101100001000000110001001110101011101000010000001100001011011000111001101101111001000000110111001101111011101000010000001100001001000000111011101100001011011000110101100100000011010010110111000100000011101000110100001100101001000000111000001100001011100100110101100101110
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0101010001101000011000010110111001101011011100110010000001100001011011100110010000100000010010000110000101110000011100000111100100100000010011100110010101110111001000000101100101100101011000010111001000100001001000000011101000101001
on 25. April 2020, 18:26 by Mesmer
It was fun to solve, but the rules are indeed complicated. A great part of its difficulty is to keeping track of these rules, and coming back to them when you solved a part of the puzzle. Another thing is that I didn't use at all the vertical "greater/less than" so they only were confusing. But, as I said, I enjoyed solving it step by step till the end.
on 25. April 2020, 16:01 by bob
A bit complicated, and requires meticulous record keeping. Fully logical for me and satisfying nonetheless.
on 25. April 2020, 00:33 by Nylimb
0100100100100000011001000110100101100100001110110010000001110100011010000110000101101110011010110111001100101110
