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prasanna16391
Posts: 1999
   
Country : India |
This annual contest shall take place from 19-28 April 2026.
More details shall be shared in subsequent posts soon.
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prasanna16391
Posts: 1999
Country : India | Some notes about April Contest 2026Please 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 when the contest starts 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 10 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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professorX
Posts: 48
Country : India | At what time will the contest start? |
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Administrator
Posts: 3602
Country : India | professorX - 2026-04-19 7:58 AM
At what time will the contest start?
Oh my bad, thought the header was up. It starts at noon India time. |
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Administrator
Posts: 3602
Country : India | The Puzzle Booklet is now available. Good luck to all participants! |
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Administrator
Posts: 3602
Country : India | The marked rows in puzzle 5 were shifted, this is fixed in the latest Puzzle Booklet. If they are pointing in between two columns, download the puzzle booklet again. |
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kiwijam
Posts: 197
Country : New Zealand | kiwijam posted @ 2026-04-19 2:15 PM Admin: Please make this thread non-restricted. |
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kiwijam
Posts: 197
Country : New Zealand | kiwijam posted @ 2026-04-19 2:25 PM #6 Azure and Rose Journey: Can the line visit the start or end points two times? e.g. we leave the start point with an azure segment, and later we pass through this point again with a long rose segment.
#12 Azure and Rose Optimum: Same question. |
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shedarshian
Posts: 2
Country : China | In the first puzzle, does the "overlap" in "may intersect or overlap" means that one orthogon completely contains another? |
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prasanna16391
Posts: 1999
Country : India | kiwijam - 2026-04-19 2:15 PM
Admin: Please make this thread non-restricted.
I think there is utility in keeping it restricted in case someone wants to verify their solution following the rules, or comment on a solve path - unrestricting individual posts is easy, just a button. |
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Riad Khanmagomedov
Posts: 267
Country : Russia | kiwijam - 2026-04-19 2:25 PM
#6 Azure and Rose Journey: Can the line visit the start or end points two times? e.g. we leave the start point with an azure segment, and later we pass through this point again with a long rose segment.
#12 Azure and Rose Optimum: Same question.
It's not forbidden. |
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Riad Khanmagomedov
Posts: 267
Country : Russia | shedarshian - 2026-04-19 2:29 PM
In the first puzzle, does the "overlap" in "may intersect or overlap" means that one orthogon completely contains another?
One orthogon can completely contain another. |
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professorX
Posts: 48
Country : India | In puzzle 3 Jigsaw with tips, in one column CN , LI both are given. Does that mean CN is seen first and then LI ?
Since CN is given on top ....
Edited by professorX 2026-04-19 4:56 PM
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professorX
Posts: 48
Country : India | In puzzle 7, for 0 sum in the bottom right corner, can a fully blackened cell be valid? |
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Barbitos
Posts: 11
Country : France | I+believe+the+example+for+2%2E+Crossword%2DListovert+is+non+unique%2C+there+seems+to+be+a+second+solution+where+FIFIR+and+RUBIA+are+swapped%2C+and+every+word%27s+grid+rotation+is+shifted+90%C2%B0+compared+to+the+given+solution%0D%0A%0D%0AGiven%2C+i%27m+having+a+very+hard+time+wrapping+my+head+around+the+logic+of+this+genre+and+might%27ve+missed+a+rule+that+disambiguates+this%0D%0A%0D%0A |
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mstang
Posts: 79
Country : United States | mstang posted @ 2026-04-20 4:41 AM (puzzle 4) What is meant by "loop that does not touch or intersect itself"? Is it like a Snake, where (copying from GP rules) "if two cells in the snake touch orthogonally, then they must be exactly one cell apart along the path of the snake, and if two cells in the snake touch diagonally, then they must be exactly two cells apart along the path of the snake"?
Also, there must be only one loop, right? The second to last sentence says "each circle belongs to a loop" (not "the loop").
Edited by mstang 2026-04-20 4:42 AM
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prasanna16391
Posts: 1999
Country : India | mstang - 2026-04-20 4:41 AM
(puzzle 4) What is meant by "loop that does not touch or intersect itself"? Is it like a Snake, where (copying from GP rules) "if two cells in the snake touch orthogonally, then they must be exactly one cell apart along the path of the snake, and if two cells in the snake touch diagonally, then they must be exactly two cells apart along the path of the snake"?
Also, there must be only one loop, right? The second to last sentence says "each circle belongs to a loop" (not "the loop").
Your understanding for the loop is correct, it is a snake-like loop.
'A' vs 'the' is just translation issues that I missed, only one loop. |
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prasanna16391
Posts: 1999
Country : India | professorX - 2026-04-19 7:29 PM
In puzzle 7, for 0 sum in the bottom right corner, can a fully blackened cell be valid?
Yes that's valid. |
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Riad Khanmagomedov
Posts: 267
Country : Russia | professorX - 2026-04-19 4:55 PM
In puzzle 3 Jigsaw with tips, in one column CN , LI both are given. Does that mean CN is seen first and then LI ?
Since CN is given on top ....
It's not necessary. |
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Riad Khanmagomedov
Posts: 267
Country : Russia | professorX - 2026-04-19 7:29 PM
In puzzle 7, for 0 sum in the bottom right corner, can a fully blackened cell be valid?
Maybe. |
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Riad Khanmagomedov
Posts: 267
Country : Russia | %5BQUOTE%5DBarbitos+%2D+2026%2D04%2D19++9%3A22+PM%0D%0A%0D%0AI+believe+the+example+for+2%2E+Crossword%2DListovert+is+non+unique%2C+there+seems+to+be+a+second+solution+where+FIFIR+and+RUBIA+are+swapped%2C+and+every+word%27s+grid+rotation+is+shifted+90%C2%B0+compared+to+the+given+solution%0D%0A%0D%0AGiven%2C+i%27m+having+a+very+hard+time+wrapping+my+head+around+the+logic+of+this+genre+and+might%27ve+missed+a+rule+that+disambiguates+this%0D%0A%0D%0A%5B%2FQUOTE%5D%0D%0AYou+cannot+swap+FIFIR+and+RUBIA+because+the+letter+R+is+upside+down%2E%0D%0A |
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shedarshian
Posts: 2
Country : China | In puzzle #3, does a pink circle allowed to be at the intersection of two words? If allowed, how does it transfer to #4? Pick one? |
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Riad Khanmagomedov
Posts: 267
Country : Russia | shedarshian - 2026-04-20 4:08 PM
In puzzle #3, does a pink circle allowed to be at the intersection of two words? If allowed, how does it transfer to #4? Pick one?
When transferring, select one of the two options that are suitable for you. |
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anurag
Posts: 151
Country : India | anurag posted @ 2026-04-20 4:38 PM 3%3a+good+questrion%2c+and+is+the+Jigsaw+puzzle+independently+unique+or+is+one+supposed+to+find+a+solution+that+works+for+the+Pentoloop%3f%0a11%3a+What+is+meant+by+this+%22Words+should+read+from+left+to+right+and+right+to+left%2c+or+top+to+bottom+and+bottom+to+top.++%22+why+are+and+and+or+used+interchangeably%3f+I+interpret+it+as+you+can+only+use+both+directions+horizontally%2c+or+only+vertically.+%0a10%3a+%22Does+not+touch+itself%22+is+not+ambiguous.+Diagonal+%3f%0aPieces+can+be+repeated%3f%0a+ |
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Riad Khanmagomedov
Posts: 267
Country : Russia | anurag - 2026-04-20 4:38 PM
3: good questrion, and is the Jigsaw puzzle independently unique or is one supposed to find a solution that works for the Pentoloop?
11: What is meant by this "Words should read from left to right and right to left, or top to bottom and bottom to top. " why are and and or used interchangeably? I interpret it as you can only use both directions horizontally, or only vertically.
10: "Does not touch itself" is not ambiguous. Diagonal ?
Pieces can be repeated?
3. At the very top of the page it says "solve two related puzzles".
11. Words can be read in any of the 4 directions, as in the example.
10. The standard rule for the loop: Loop does not touch or intersect itself. In the example, the V pentomino is used twice. In this sense, it is possible to repeat. But there is no third V pentomino among the 14 given pentominoes. Therefore, you cannot use the V pentomino three times. |
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Lynxie
Posts: 1
Country : Philippines | Lynxie posted @ 2026-04-20 6:56 PM Administrator - 2026-04-19 11:59 AM
The Puzzle Booklet is now available. Good luck to all participants! |
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anurag
Posts: 151
Country : India | anurag posted @ 2026-04-20 7:08 PM %22Two+L+or+I+pentominoes+cannot+fit+entirely+in+2+x+5+and+5+x+2+rectangles.%22+This+is+automatically+implied+by+the+immediately+preceding+statement.+So+it+should+be+removed+to+avoid+confusion |
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Barbitos
Posts: 11
Country : France | Riad Khanmagomedov - 2026-04-19 6:09 PM
You cannot swap FIFIR and RUBIA because the letter R is upside down.
I don't think that happens in the alternative solution.
Describing it accurately is hard, so here's a link to what it looks like: https://imgur.com/gcIZnre |
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Barbitos
Posts: 11
Country : France | anurag - 2026-04-20 2:08 AM
"Two L or I pentominoes cannot fit entirely in 2 x 5 and 5 x 2 rectangles." This is automatically implied by the immediately preceding statement. So it should be removed to avoid confusion
It is not. In the example, this rule prevents swapping the leftmost L with the bottommost I, because then the first two columns would form a 5x2 rectangle that is filled with two I pentominoes and nothing else |
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anurag
Posts: 151
Country : India | anurag posted @ 2026-04-20 9:20 PM Got+it%2c+Thanks!%0a |
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Puzlifouk
Posts: 73
Country : France | Hello everybody. Problem 6 - Azure and rose journey:
I dont understand the scheme L1 R2 L3 R1 L2 R3 L1... If letters L and R are for colours, is L for Azure (why?) and R for Rose, or is it possible to begin with Rose? |
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Riad Khanmagomedov
Posts: 267
Country : Russia | Puzlifouk - 2026-04-21 2:16 AM
Hello everybody. Problem 6 - Azure and rose journey:
I dont understand the scheme L1 R2 L3 R1 L2 R3 L1... If letters L and R are for colours, is L for Azure (why?) and R for Rose, or is it possible to begin with Rose?
I first composed the text in Russian, and then connected the translator. In Russian, the word azure is written with the letter L. I should have changed the letters L to A, but it's too late. You need to start with azure, as stated in the rules. |
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Riad Khanmagomedov
Posts: 267
Country : Russia | Barbitos - 2026-04-20 8:26 PM
Riad Khanmagomedov - 2026-04-19 6:09 PM
You cannot swap FIFIR and RUBIA because the letter R is upside down.
I don't think that happens in the alternative solution.
Describing it accurately is hard, so here's a link to what it looks like: https://imgur.com/gcIZnre
Unfortunately, Russians cannot browse websites with the .com domain. Upon prior request, I was allowed to use only the LMI website.
I'll try to explain it without following the link. If you turn the sheet 180 degrees, the letters R become legible (not rotated ). Then FIFIR and RUBIA can be entered by looking at the correctly oriented letters R. |
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Puzlifouk
Posts: 73
Country : France | Fine ! And about pb 6, again :
If you have 4 aligned points A, B , C, D: is it possible to have segment AC (of length 2) in the line, and later, segment CD (of length 1) also in the line, or is it forbidden, because "segments of the same color do not touch each other)? |
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Riad Khanmagomedov
Posts: 267
Country : Russia | Puzlifouk - 2026-04-21 1:57 PM
Fine ! And about pb 6, again :
If you have 4 aligned points A, B , C, D: is it possible to have segment AC (of length 2) in the line, and later, segment CD (of length 1) also in the line, or is it forbidden, because "segments of the same color do not touch each other)?
If the segments AC and CD lie on the same straight line, then these are segments of the same color. They touch each other at point C, which is prohibited by the rules. |
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prasanna16391
Posts: 1999
Country : India | Barbitos - 2026-04-20 8:26 PM
Describing it accurately is hard, so here's a link to what it looks like: https://imgur.com/gcIZnre
I can't see the image anymore but you can mail it to me (prasanna16391@gmail.com ) or send on discord or whatever, I'll forward to Riad. |
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mstang
Posts: 79
Country : United States | mstang posted @ 2026-04-21 4:16 PM Puzzle 3-4 answer format: It says both "Use ... X wherever there is a pair of letters in the same cell" and "Write the letters in alphabetical order in the white circles." Is this correct? These two statements seem to conflict with each other. |
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anurag
Posts: 151
Country : India | anurag posted @ 2026-04-21 4:27 PM Word+xyz+placed+horizontally+intersects++a+vertical+word+ending+in+x+and+a+vertical+word+ending+in+z+and+a+vertical+word+starting+in+y.+This+breaks+the+%0a%22parallel+words+must+be+spaced+1+cell+apart%22+rule.++Right%3f |
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Riad Khanmagomedov
Posts: 267
Country : Russia | mstang - 2026-04-21 4:16 PM
Puzzle 3-4 answer format: It says both "Use ... X wherever there is a pair of letters in the same cell" and "Write the letters in alphabetical order in the white circles." Is this correct? These two statements seem to conflict with each other.
Initially, I suggested specifying pairs of letters in alphabetical order. Prasanna corrected the answer format and suggested specifying X in all cases with paired letters. Please specify X. |
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Riad Khanmagomedov
Posts: 267
Country : Russia | anurag - 2026-04-21 4:27 PM
Word xyz placed horizontally intersects a vertical word ending in x and a vertical word ending in z and a vertical word starting in y. This breaks the
"parallel words must be spaced 1 cell apart" rule. Right?
I didn't find such a rule in the booklet. |
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anurag
Posts: 151
Country : India | anurag posted @ 2026-04-21 4:59 PM My+bad%2c+excuse+me.+Please+confirm+if+such+a+placement+allowed%2c+thanks%0a |
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Riad Khanmagomedov
Posts: 267
Country : Russia | anurag - 2026-04-21 4:59 PM
My bad, excuse me. Please confirm if such a placement allowed, thanks
This placement is allowed in crosswords. |
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anurag
Posts: 151
Country : India | anurag posted @ 2026-04-21 8:01 PM 11%3a+First+row+contents+in+answer+key+seem+to+be+wrong+(+N+instead+of+R) |
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Riad Khanmagomedov
Posts: 267
Country : Russia | I have updated the booklet to reflect all the comments on the forum. I ask Prasanna to upload the file. |
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Christian
Posts: 7
Country : France | Hello, for 11 (Codeword), in order to maximize the number of used letters, is it allowed to complete the grid with some words not in pairs ? |
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attriyadesigns
Posts: 1
Country : United States | Nice |
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Administrator
Posts: 3602
Country : India | Riad Khanmagomedov - 2026-04-23 11:05 AM
I have updated the booklet to reflect all the comments on the forum. I ask Prasanna to upload the file.
This is done now. |
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Vishnu X9
Posts: 1
Country : India | Hello everyone . I am new to this page. I came here willing to participate in contests and play sudoku. I have played in other mobile apps previously . Can anyone explain me how to join a contest and get a puzzle to solve please |
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prasanna16391
Posts: 1999
Country : India | Vishnu X9 - 2026-04-24 10:19 AM
Hello everyone . I am new to this page. I came here willing to participate in contests and play sudoku. I have played in other mobile apps previously . Can anyone explain me how to join a contest and get a puzzle to solve please
This is a thread of a puzzle contest which has other puzzles with Sudoku. You can try any past contests here - https://logicmastersindia.com/live/search-contests
The next Sudoku contest to try is Sudoku Mahabharat round 4 which you can find more details for here - https://logicmastersindia.com/SM/2026sm.asp
Any current/recent contest will be displayed at the top, like right now you can see Riad's April Contest up there which is what this thread is for. |
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Riad Khanmagomedov
Posts: 267
Country : Russia | Christian - 2026-04-23 11:46 PM
Hello, for 11 (Codeword), in order to maximize the number of used letters, is it allowed to complete the grid with some words not in pairs ?
Hello, you need to use all the words from the selected pairs. You cannot use words without a pair. |
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Puzlifouk
Posts: 73
Country : France | Hello+%2E%2E%2E+I%E2%80%99d+like+to+check+something+regarding+problem+7+%E2%80%93+Bicolour+Sudoku%3A+I+assume+that+the+four+%E2%80%984%E2%80%99s%E2%80%99+appearing+in+the+grid+to+be+solved+are+all+visible+and+cannot+be+coloured+black%2C+not+even+partially%3F+Right%3F |
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Carlos
Posts: 11
Country : France | Carlos posted @ 2026-04-25 1:01 PM The four given '4's' can be colored. These clues only refer to the numbers options, not to the paint options. (Interestingly, it seems there is no good way to indicate clues referring to white painting for this puzzle.)
Edited by Carlos 2026-04-25 1:02 PM
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Administrator
Posts: 3602
Country : India | |
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Riad Khanmagomedov
Posts: 267
Country : Russia | Please review the preliminary results. |
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Administrator
Posts: 3602
Country : India | |
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Riad Khanmagomedov
Posts: 267
Country : Russia | Congratulations to James, Paul and Ken! |
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professorX
Posts: 48
Country : India | Congratulations to all the winners :) Excellent contest by Riad as usual! |
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kiwijam
Posts: 197
Country : New Zealand | kiwijam posted @ 2026-04-30 8:50 AM Thanks+Riad+for+a+great+contest+with+new+ideas+and+tough+puzzles%2E%0D%0AWow%2C+what+a+close+finish%21+1+point+between+1st+and+3rd+%2D+last+year+it+was+33+points+from+1st+to+3rd%2E+%F0%9F%A4%AF%0D%0AAnd+special+mention+to+Michael+and+Anurag+and+Ken+who+created+the+best+Crossword+optimisers+%2D+I+just+couldn%27t+fit+any+more+words+into+mine%2E |
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leoranger
Posts: 3
Country : Latvia | Score page must be improved. Admin, please check the result of mstang for the second puzzle and his answer in wrong submis(s)sions list . Congrats to the winners! |
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ha102559
Posts: 1
Country : China | Please, thank you.
Can the edges of any two orthogons touch each other?
Can corners touch corners?
Can one orthogon be contained entirely within another? |
Riad Khanmagomedov's April Contest — 19th to 28th April 2026