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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1905
  
Location: India |
This annual contest shall take place from 18-27 April 2025.
More details shall be shared in subsequent posts soon.
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1905
Location: India | Some notes about April Contest 2025Please note this contest will have a slightly different format than regular LMI tests.
Key differences from regular LMI tests:
1. There is no IB (i.e. no Instructions Booklet). If you have any questions about any puzzle, please ask here in the forum.
2. The PB (Puzzle Booklet) does not have any password.
3. You can download the pdf and start solving. Login at the contest page and click on "Start test" to start submitting.
4. There is no time limit other than the 10 day duration. You can submit until the contest ends.
5. There will be some optimizer puzzles. Other puzzles will be very hard (compared to regular LMI tests)
6. Same scores will have same rank (i.e. early submissions do not count towards rank)
Other important points:
7. There shall be no online solving interface (like penpa) provided for this test.
8. The score page shall be made available later.
9. There shall be 9 pages in the Puzzle Booklet.
10. Participants can submit answers any number of times. The last submission shall be considered for scoring.
11. There shall be no separate notification on submitting answers.
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1905
Location: India | |
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1905
Location: India | Small change from earlier, we will have instant grading after all. This means the answer for the optimizers will show red highlight, but we will adjust it in the backend later, so ignore that. |
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1905
Location: India | The Puzzle Booklet is now available, submissions can start 2 minutes from now. |
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Posts: 6
Location: France | Hello, for puzzle 2 Tourist how do we write an answer as for example SW ? Format answer says only 8 times. Should we write S instead of SW ? |
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Posts: 70
Location: France | Hello everybody.
One minor comment: the points awarded on some puzzles don't always match up between the puzzle booklet and the submission page.
Puzzle booklet: points awarded for puzzles 1, 3, 4, 5, 7 and 8 are respectively 4, 6, 4, 5, 12 and 7;
submission page: points awarded for puzzles 1, 3, 4, 5, 7 and 8 are respectively 5, 5, 5, 6, 11 and 11. |
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1905
Location: India | Christian - 2025-04-18 2:02 PM
Hello, for puzzle 2 Tourist how do we write an answer as for example SW ? Format answer says only 8 times. Should we write S instead of SW ?
8 times here just means describing 8 cells, but there was an error in the backend that would show the box red if you entered more than 8 characters, I've changed that now. For SW just put SW in the string. |
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1905
Location: India | Puzlifouk - 2025-04-18 3:13 PM
Hello everybody.
One minor comment: the points awarded on some puzzles don't always match up between the puzzle booklet and the submission page.
Puzzle booklet: points awarded for puzzles 1, 3, 4, 5, 7 and 8 are respectively 4, 6, 4, 5, 12 and 7;
submission page: points awarded for puzzles 1, 3, 4, 5, 7 and 8 are respectively 5, 5, 5, 6, 11 and 11.
Thanks for letting us know. The Puzzle booklet had some late changes and the submission page points are from an earlier iteration. We will fix this soon, but Puzzle booklet has the accurate set of points. Sorry for the confusion. |
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Posts: 12
Location: Japan | Hi!
In puzzle 12, is it possible to put a zero in the outside clue? Zero means that there is no circle in that direction. |
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Posts: 8
Location: France | if+you+were+allowed+to+have+a+clue+pointing+at+0+circles+i+guess+it+would+be+a+1+and+not+a+0%0aAlso+interested+in+the+answer+to+that+question |
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Posts: 12
Location: France | There%E2%80%99s+a+tiny+mistake+in+the+booklet%2C+optimizer+12%2C+the+answer+key+for+the+example+should+begin+with+17%2E4+%2826+minus+8%2E6%29 |
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Posts: 12
Location: Japan | %3E+Barbitos%0D%0AThat%27s+a+good+point%2C+I+guess+it%27s+the+same+logic+as+0%21%3D1%2E%0D%0AAnd+for+clarification+of+the+rule%2C+I+would+like+to+add+
+clarification+of+the+rule%2C+I+would+like+to+add+%E2%80%9Cthe+outer+clue+must+point+to+one+or+more+circles%E2%80%9D%2E
circles%E2%80%9D%2E
Edited by SP1 2025-04-18 10:51 PM
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Moscow Puzzle Cup 2016 Author
Posts: 249
Location: Russia | SP1 - 2025-04-18 9:47 PM
Hi!
In puzzle 12, is it possible to put a zero in the outside clue? Zero means that there is no circle in that direction.
Hi!
Zero cannot be specified. Put only the products of the numbers in circles. |
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Moscow Puzzle Cup 2016 Author
Posts: 249
Location: Russia | %5BQUOTE%5DL00ping007+%2D+2025%2D04%2D18++10%3A16+PM%0D%0A%0D%0AThere%E2%80%99s+a+tiny+mistake+in+the+booklet%2C+optimizer+12%2C+the+answer+key+for+th
e+booklet%2C+optimizer+12%2C+the+answer+key+for+the+example+should+begin+with+17%2E4+%2826+minus+8%2E6%29%5B%2FQUOTE%5D%0D%0AI%27ll+fix+it%2C+thanks%2
E6%29%5B%2FQUOTE%5D%0D%0AI%27ll+fix+it%2C+thanks%21
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Moscow Puzzle Cup 2016 Author
Posts: 249
Location: Russia | %5BQUOTE%5DSP1+%2D+2025%2D04%2D18++10%3A51+PM%0D%0A%0D%0A%3E+Barbitos%0D%0AThat%27s+a+good+point%2C+I+guess+it%27s+the+same+logic+as+0%21%3D1%2E%0D%0A
I+guess+it%27s+the+same+logic+as+0%21%3D1%2E%0D%0AAnd+for+clarification+of+the+rule%2C+I+would+like+to+add+%E2%80%9Cthe+outer+clue+must+point+to+one+o
to+add+%E2%80%9Cthe+outer+clue+must+point+to+one+or+more+circles%E2%80%9D%2E%5B%2FQUOTE%5D%0D%0AIf+there+is+only+one+circle+in+a+direction%2C+the+prod
here+is+only+one+circle+in+a+direction%2C+the+product+will+be+the+number+in+the+circle%2E%0D%0A
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Posts: 8
Location: France | Technically the product of no numbers is 1, so it could be interpreted that a 1 clue in a diagonal is satisfied by having no circles in that diagonal
Can you please confirm that if a diagonal has no circles, you're not allowed to clue it? |
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Posts: 3
Location: China | prasanna16391 - 2025-04-18 1:11 AM
Small change from earlier, we will have instant grading after all. This means the answer for the optimizers will show red highlight, but we will adjust it in the backend later, so ignore that.
Does this mean there are penalties for wrong submissions in puzzle 1-9, and they really count in the final result? |
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Moscow Puzzle Cup 2016 Author
Posts: 249
Location: Russia | Barbitos - 2025-04-19 3:58 PM
Technically the product of no numbers is 1, so it could be interpreted that a 1 clue in a diagonal is satisfied by having no circles in that diagonal
Can you please confirm that if a diagonal has no circles, you're not allowed to clue it?
If there are no circles in the selected direction, then you cannot enter a number in the yellow square. |
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2021 World Sudoku+Puzzle Convention Organizer
Posts: 1905
Location: India | NGC 1535 - 2025-04-19 8:45 PM
prasanna16391 - 2025-04-18 1:11 AM
Small change from earlier, we will have instant grading after all. This means the answer for the optimizers will show red highlight, but we will adjust it in the backend later, so ignore that.
Does this mean there are penalties for wrong submissions in puzzle 1-9, and they really count in the final result?
Unfortunately yes, I suppose its still better than a would-be 0 with a wrong submission. |
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Posts: 12
Location: Japan | Riad Khanmagomedov - 2025-04-19 11:18 PM
Barbitos - 2025-04-19 3:58 PM
Technically the product of no numbers is 1, so it could be interpreted that a 1 clue in a diagonal is satisfied by having no circles in that diagonal
Can you please confirm that if a diagonal has no circles, you're not allowed to clue it?
If there are no circles in the selected direction, then you cannot enter a number in the yellow square.
OK, Thank you! |
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Posts: 140
Location: India | Names+Hitori%3a+I+think+words+like+Sarayu+and+Joeri+cannot+be+used.+It+is+confusing+that+they+are+on+the+list. |
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Posts: 1
Location: ITALY | I+can%27t+fully+understand+the+rules+of+9%2E+Mosaic+with+digits%3A%0D%0A+%2D+the+%22diagonal+d
its%3A%0D%0A+%2D+the+%22diagonal+direction%22+pointed+by+an+arrow+is+always+a+45%C2%B0+directions%
3;is+always+a+45%C2%B0+directions%2C+regardless+of+the+cell%27s+shape%3F+Or+is+it+perpendicular
shape%3F+Or+is+it+perpendicular+to+the+diagonal+of+the+arrow%27s+cell%3F%0D%0A+%2D+%22number+o
%27s+cell%3F%0D%0A+%2D+%22number+of+diagonals+parallel%22+means+%22parallel%22+or+%22of+the+same+t
arallel%22+or+%22of+the+same+type%22%3F+I+mean%3A+two+diagonals+%22%2F%22+in+a+1x1+cell+an
#43;%22%2F%22+in+a+1x1+cell+and+in+a+2x1+cell+should+be+considered+%22parallel%22%3F
#43;considered+%22parallel%22%3F
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Moscow Puzzle Cup 2016 Author
Posts: 249
Location: Russia | anurag - 2025-04-23 7:15 PM
Names Hitori: I think words like Sarayu and Joeri cannot be used. It is confusing that they are on the list.
These are the names of the participants of April Contest 2024. Everyone decides for themselves which words to use and which not to use. |
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Posts: 1
Location: Bangladesh | %F0%9F%8C%9F |
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WSPC 2017 • Schedule • Participation • Location • WSC • WPC • Contact •Search •Recent
Riad Khanmagomedov's April Contest — 18th to 27th April 2025
