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WSPC Organizer
Posts: 739
  
Location: India | Fred76 - 2016-01-03 2:59 AM
The rule of "Twin Givens sudoku" is strangely formulated:
"Two cells will
remain empty as
these are twins and
of the same value."
What is the value of an empty cell ??
Fred
Yes, its quite an amusing way of stating it.
Lets just assume the value is 0 :-)
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Diagonal Vision Author
Posts: 337
Location: Switzerland | Rohan Rao - 2016-01-03 9:53 AM
Fred76 - 2016-01-03 2:59 AM
The rule of "Twin Givens sudoku" is strangely formulated:
"Two cells will
remain empty as
these are twins and
of the same value."
What is the value of an empty cell ??
Fred
Yes, its quite an amusing way of stating it.
Lets just assume the value is 0 :- )
Or, if this value isn't 0, perhaps it represents the quantum vacuum (X is a quantum vacuum fluctuation when you enter codes)... |
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Posts: 71
Location: India | Can I get any twin givens 6*6 sudoku with step by step solution ? This variant seems to be very confusing to me. |
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Location: India | shera90 - 2016-01-04 7:48 PM
Can I get any twin givens 6*6 sudoku with step by step solution ? This variant seems to be very confusing to me.
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1782
Location: India | As shown in the above image, it helps to have notations for cells which cannot be shaded. On paper I usually circle the cells which cannot be shaded/crossed out. Then its just about seeing how two shaded cells can be placed in some rows/columns/boxes with many circles considering that the two shaded cells can't be next to each other, and solving the rest as a classic from 1-4. |
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Posts: 55
Location: India | Will it always be 1-4 for a 6*6 and 1-7 for a 9*9 sudoku that will be unshaded?? |
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1782
Location: India | Some Important Notes
- In Linked Classics, please note that the two grids are considered as one Sudoku for the sake of submission. If you submit only one grid, this will be marked wrong and result in an unnecessary penalty, so submit only if both grids are solved.
- In Twin Givens Sudoku, if you are solving on the online interface, you do not need to place Xs. We need this indication for the paper submissions, but since it is not a part of the solving logic, we've decided not to make it a necessity while solving online.
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1782
Location: India | pranavmanu - 2016-01-08 8:55 PM
Will it always be 1-4 for a 6*6 and 1-7 for a 9*9 sudoku that will be unshaded??
For this contest, yes. |
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Posts: 102
Location: United States | Is there a mechanism for marking X's in the Twin Givens Sudokus on the online applet? If not, would the applet accept my answer if I were to use a number that would not otherwise appear in the grid to mark X's, e.g. a 9? Or do the X squares have to be fully empty?
Edited by ghirsch 2016-01-08 10:45 PM
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Location: India | ghirsch - 2016-01-08 10:45 PM
Is there a mechanism for marking X's in the Twin Givens Sudokus on the online applet? If not, would the applet accept my answer if I were to use a number that would not otherwise appear in the grid to mark X's, e.g. a 9? Or do the X squares have to be fully empty?
You can type "X", just like you would type any other digit.
The blank squares can either be blank or have X.
We will enable solving of the example online in next half an hour. |
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Location: India | Administrator - 2016-01-08 11:04 PM
We will enable solving of the example online in next half an hour. Now available. |
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Mean Minis (2020) Author
Posts: 774
Location: India | | How well did the variants represent the theme of the test ? | representation could have been better | | | What was your opinion of the distribution of easy/hard puzzles? | Too many easy puzzles | | | What did you think about the puzzle quality of the test? | Fairly Nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
Not sure if Disjoint sudoku represents the theme of the test. Maybe Isosudoku could have been a possible type.
The answer keys for a fair number of puzzles came quite early in the solving process. However, it is always difficult to set answer key, especially for 6x6 ones.
Overlap 9x9 and Linked 9x9 were nice. The test was enjoyable overall. Thanks to the authors for this test. |
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| | How well did the variants represent the theme of the test ? | representation could have been better | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
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| | How well did the variants represent the theme of the test ? | representation could have been better | | | What was your opinion of the distribution of easy/hard puzzles? | Too many easy puzzles | | | What did you think about the puzzle quality of the test? | Average | |
Representation - Surprised not to see SudoKurve, IsoSudoku as types.
Apart from being too easy, many Sudokus didn't use the "extra" rule of the variant significantly.
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| | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | What did you think about the puzzle quality of the test? | Very nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
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WSPC Organizer
Posts: 739
Location: India | | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | What did you think about the puzzle quality of the test? | Fairly Nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
Really liked the Linked and Disjoint 9x9. Overall a good set but on the easier side.
Thanks Rajesh!
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1782
Location: India | About variant choice, we had two considerations to make.
One is, that there is an Irregular variations round too.
Another is, that some variants are not supported by the online interface. This is a bigger consideration than the first one, and we'd love to hear opinions on this from solvers who regularly use the interface. How would you feel about 1 or 2 variants not being on the interface? If we can be more flexible in this way we'd have a wider range to choose from. |
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| | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Too many medium difficult puzzles | | | What did you think about the puzzle quality of the test? | Very nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
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Posts: 20
Location: Czech Republic | | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Too many easy puzzles | | | What did you think about the puzzle quality of the test? | Very nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
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| | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What did you think about the puzzle quality of the test? | Very nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
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Neighbours Variations (SM 15/16) Author
Posts: 18
Location: India | | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | What did you think about the puzzle quality of the test? | Very nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
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SM 2020 (Math) Author
Posts: 417
Location: India | | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | What did you think about the puzzle quality of the test? | Fairly Nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
A nice breezy set.Feels good to revisit classic based sudokus occasionally.More importantly,to complete a test.
Thanks Rajesh for choosing this theme!
I never had any difficulty solving any of the sudokus.All Classics were falling very quickly before using any of the advanced techniques like triplets ,hidden single etc.,
Linked(16) and Overlapping(16)offered some resistance in way of my completion and were definitely the best of the lot by a far margin and my favouries .Neatly constructed.
To conclude, a very pleasant set.Thanks for authoring Rajesh!Would have been even more better with a bit more difficult Classics. |
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Posts: 44
Location: Thailand | | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Too many medium difficult puzzles | | | What did you think about the puzzle quality of the test? | Fairly Nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Many puzzles were worth too much or too little | |
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Posts: 71
Location: India | Due to some flash problems, I was not able to correct my mistakes for Overlapping 9*9 and Linked 9*9. I have sent an email with the correct solutions. Please add up these scores if you find them correct. |
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Posts: 55
Location: India | | How well did the variants represent the theme of the test ? | variations represented the theme well | | | What was your opinion of the distribution of easy/hard puzzles? | Just right | | | What did you think about the puzzle quality of the test? | Fairly Nice | | | Of the puzzles you solved/attempted, how well did the point values reflect the difficulty? | Most puzzles were worth the right amount | |
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Twisted Classics - 9th-11th Jan - Sudoku Mahabharat & ISC Qualifier
