Beginner Series, RC indexing (159)
(Published on 22. October 2023, 02:51 by SimplePurpleFrog)
- GPT stumper, Yin-Yang
- Thermo Sudoku
- Arrow Sudoku
- Kropki Sudoku
- Killer Sudoku
- RC indexing (159)
- Little Killer
(visual examples given at the end of this page, before the comments)
Each row, column and 2x2 box contains the digits 1 to 4 once each.
RC indexing, similar to 159 rules of 9x9 sudoku, extended to rows and columns:
If a cell containing an "R" with digit "d" is in column "c", then, in the same row, digit "c" must be in column "d".
If a cell containing a "C" with digit "d" is in row "r", then, in the same column, digit "r" must be in row "d".
You can play Beginner Series, RC indexing (159) on f-puzzles or CtC.
Alternative rules some might prefer (exactly the same puzzle):
Each row, column and 2x2 box contains the digits 1 to 4 once each.
RC indexing, similar to 159 rules of 9x9 sudoku, extended to rows and columns:
The digit in a Red cell in column "c" is the column where digit "c" must be placed on that row.
The digit in a Blue cell in row "r" is the row where digit "r" must be placed on that column.
You can play Beginner Series, RC indexing (159) on f-puzzles or CtC.
Example rules for row-indexing (R, red), and column-indexing (C. blue).
The row example shows all possible combinations on row 3, it could be shifted to any row, with the same combinations, in the same columns.
The column example shows all possible combinations on column 2, it could be shifted to any column, with the same combinations, in the same rows.
Solution code: All digits in row 3 from left to right
Comments
on 20. January 2024, 01:32 by SimplePurpleFrog
Link to Anti Knight - Thermo
on 9. January 2024, 19:00 by Jorava
Understanding the rules was the hardest part of the puzzle.
on 2. December 2023, 16:01 by Dist
This restriction was definitely the hardest to understand in the series, but finally it clicked. thanks for the puzzle and the whole Beginner series it was loads of fun.
SPF> you are very welcome, I am glad you enjoyed the whole series.
on 29. November 2023, 03:22 by SimplePurpleFrog
Link to Little Killer
on 8. November 2023, 02:00 by SimplePurpleFrog
Visual examples provided
on 3. November 2023, 13:24 by Puzzle Weasel
Thanks, I enjoyed that. If you'd like a suggestion to make it more accessible to beginners, an illustrated example image would probably help make the rule clearer.
I understood it because I've done enough 159 puzzles to recognise that the R clues were standard 159 indexes, and the C clues were the same thing, but flipped 90 degrees.
SPF> Thanks & good idea, done :-)
on 22. October 2023, 23:19 by SimplePurpleFrog
Alternative rule text (same puzzle)
on 22. October 2023, 14:37 by flaemmchen
Kann man das noch komplizierter ausdruecken?
SPF> Sorry to disappoint, I truly did my best. I welcome any suggestion that may improve readability and enjoyment.
