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Riad Khanmagomedov's April Contest — 18th to 27th April 2025
   LMI Tests -> Annual Competitions51 posts • Page 2 of 3 • 1 2 3
krasnosulinec1797
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-26 4:05 PM (#33785 - in reply to #33716) (#33785) Top




Posts: 4

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anurag
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-26 6:33 PM (#33786 - in reply to #33716) (#33786) Top




Posts: 140
1002020
Location: India		LOL%2c+this+is+a+debacle.++Admin%3a+please+delete+my+submission.+++I+do+not+want+to+enter+anymore.+Thank+you.+BTW%2c+the+reply+is+still+unclear+and+do
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g+diametrically+opposite.+Things+need+to+be+made+explicit+as+this+is+only+a+test+of+logic.
Carlos
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-26 10:24 PM (#33787 - in reply to #33786) (#33787) Top




Posts: 10

Location: France		@anurag The example of "Name Hitori" contains the name "AOKI" without counting it among the valid words, since it overlaps "NAOKI". Nevertheless, the grid is considered to be valid. Hence, I guess that a valid grid can contain words overlapping other words, as long as they are not counted. At least, that is what I understand from the example.
Unfortunately, you're not the only one who misunderstood the first answer of Riad: this is my case too, so I understand your frustration.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-27 12:51 AM (#33788 - in reply to #33785) (#33788) Top


Moscow Puzzle Cup 2016 Author

Posts: 249
1001002020
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0%D0%BC%D0%B8%22%2E
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-27 12:59 AM (#33789 - in reply to #33787) (#33789) Top


Moscow Puzzle Cup 2016 Author

Posts: 249
1001002020
Location: Russia
Carlos - 2025-04-26 10:24 PM

@anurag The example of "Name Hitori" contains the name "AOKI" without counting it among the valid words, since it overlaps "NAOKI". Nevertheless, the grid is considered to be valid. Hence, I guess that a valid grid can contain words overlapping other words, as long as they are not counted. At least, that is what I understand from the example.
Unfortunately, you're not the only one who misunderstood the first answer of Riad: this is my case too, so I understand your frustration.

Paul, thanks for your detailed answer to Anurag. The example is eloquent.
krasnosulinec1797
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-27 4:45 AM (#33790 - in reply to #33716) (#33790) Top




Posts: 4

Location: Russia		%D0%9F%D1%80%D0%BE%D1%88%D1%83+%D0%B0%D0%B4%D0%BC%D0%B8%D0%BD%D0%B8%D1%81%D1%82%D1%80%D0%B0%D1%82%D0%BE%D1%80%D0%B0+%D0%9E%D0%A2%D0%9C%D0%95%D
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%D0%B7%D0%B0%D1%8F%D0%B2%D0%BA%D1%83%2E
prasanna16391
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-28 5:02 AM (#33792 - in reply to #33781) (#33792) Top


2021 World Sudoku+Puzzle Convention Organizer

Posts: 1907
1000500100100100100
Location: India
kiwijam - 2025-04-26 2:58 AM

A question for LMI:


Simple explanation here I think, unless I misunderstood the question. Two posts were pending approval as they were first time posts from people, and some of us were away for the weekend and slow to approve it.
debmohanty
Subject: RE: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-28 7:05 AM (#33793 - in reply to #33716) (#33793) Top





Posts: 1869
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Location: India

Optimizer Submissions

Submissions to Optimizer puzzles here.

Puzzles are not checked for correctness. If you notice any incorrect submissions, please help Riad by reporting them.

Puzzle 10 : S not cross checked
Puzzle 11 : N not cross checked, Hitori not solved
Puzzle 12 : S, L not cross checked. puzzle not solved.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-28 10:41 PM (#33795 - in reply to #33716) (#33795) Top


Moscow Puzzle Cup 2016 Author

Posts: 249
1001002020
Location: Russia		Preliminary+results+have+been+published%2E+%0D%0AI+ask+Christian+to+check+his+Hitori%2E+%0D%0ANikola&#
#43;check+his+Hitori%2E+%0D%0ANikola+and+Du%D1%81%2C+please+check+your+answers+to+puzzle+12%2E+The
ur+answers+to+puzzle+12%2E+The+lines+should+not+overlap%2E+
kiwijam
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-29 4:02 PM (#33797 - in reply to #33716) (#33797) Top




Posts: 190
10020202020
Location: New Zealand		Oh+wow%2C+thank+you+for+a+great+contest+Riad%21+The+puzzles+were+hard%2C+but+they+are+
#43;were+hard%2C+but+they+are+always+hard%2E+And+thank+you+to+all+the+contestants+with+sho
o+all+the+contestants+with+short+names%2E+%F0%9F%98%8E%0D%0AI+don%27t+think+anybody+has+got+100
t+think+anybody+has+got+100+points+before%2E+If+it+is+useful+for+others%2C+I+will+shar
eful+for+others%2C+I+will+share+some+thoughts+on+how+I+approached+them%2E%0D%0A%0D%0AOpti%2DSumdoku%3A
pproached+them%2E%0D%0A%0D%0AOpti%2DSumdoku%3A+%0D%0AThe+first+step+was+to+find+a+grid+with+a+high+
43;find+a+grid+with+a+high+Samedoku+score%2E+I+looked+at+patterns+for+each+digit+separatel
;patterns+for+each+digit+separately%2E+It+is+not+possible+to+place+a+digit+in+9+cells+
;place+a+digit+in+9+cells+so+that+it+counts+18+times+to+the+sum+%28when+every+digi
;to+the+sum+%28when+every+digit+can+see+another+digit+in+both+diagonal+directions%29%2E+The
;both+diagonal+directions%29%2E+The+best+possible+is+16+times+%28see+the+9s+in+my+solution%29%
8see+the+9s+in+my+solution%29%2E+But+not+all+digits+can+be+16+%2D+the+best+grid+ov
be+16+%2D+the+best+grid+overall+has+%7B16%2C+15%2C+15%2C+14%2C+14%2C+14%2C+14%2C+14%2C+
;14%2C+14%2C+14%2C+14%2C+14%2C+14%7D+for+the+Samedoku%2E+I+think+Carlos+has+the+same+grid&
hink+Carlos+has+the+same+grid+as+me%2E%0D%0AThe+second+step+is+to+take+away+as+many+di
is+to+take+away+as+many+digits+as+possible%2E+Check+for+uniqueness%2C+try+another+digit%2E+
uniqueness%2C+try+another+digit%2E+Eventually+you+will+get+down+to+%7E22+clues%2E%0D%0AThe+last+st
to+%7E22+clues%2E%0D%0AThe+last+step+is+to+choose+which+digit+goes+in+each+part+of+the+
3;goes+in+each+part+of+the+grid+pattern%2E+Calculate+16%2F15%2F14+minus+the+number+of+hints
4+minus+the+number+of+hints+remaining+%28e%2Eg%2E+9+gets+the+best+place+%3D+16%2D1%2C+8
+best+place+%3D+16%2D1%2C+8+gets+the+14%2D0%2C+7+gets+15%2D2%29%2E+%0D%0APlease+don%27t+try
%2D2%29%2E+%0D%0APlease+don%27t+try+to+solve+my+classic+sudoku%21+It+is+unique%2C+but+it+needs
3;It+is+unique%2C+but+it+needs+a+lot+of+Xwings%2C+Ywings%2C+chains%2E%2E%2E+%F0%9F%98%AD%0D%0A%0D%0ANa
#43;chains%2E%2E%2E+%F0%9F%98%AD%0D%0A%0D%0AName+Hitori%3A%0D%0AI+decided+to+use+all+the+2%2Dletter+and+3+
+all+the+2%2Dletter+and+3+words%2C+and+many+4s%2C+and+I+ignored+all+5%5FPLUS%5F+words%2E%0
#43;ignored+all+5%5FPLUS%5F+words%2E%0D%0AIt+is+easy+to+have+too+many+blacks%2C+or+not+enough+
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ner%2E+I+found+another+4x4+with+6+words+inside%2E+When+I+put+that+in+the+bottom%2Dright%2C
;put+that+in+the+bottom%2Dright%2C+the+common+letters+%28e%2Eg%2E+ADEM%2DENDO%29+helped+fill+90%25+
3;ADEM%2DENDO%29+helped+fill+90%25+of+those+cells+with+black+or+white%2E+I+filled+the+top%2Dri
#43;white%2E+I+filled+the+top%2Dright+with+4%2Dwords+too%2C+sometimes+choosing+letters+for+Hitori%2C&#
s+choosing+letters+for+Hitori%2C+sometimes+choosing+for+intersection%2E+At+the+end+I+put+the&#
%2E+At+the+end+I+put+the+final+2%2D+and+3%2Dwords+in+the+gaps%2E+I+had+two+empty&#
;the+gaps%2E+I+had+two+empty+cells%2E+One+I+used+to+finish+the+Hitori%2C+and+one+was&#
sh+the+Hitori%2C+and+one+was+a+bonus+point%2E%0D%0A%0D%0AThreads+With+Knots%3A%0D%0AI+wanted+to+st
;With+Knots%3A%0D%0AI+wanted+to+start+with+long+diagonal+lines+for+the+1st%2C+3rd%2C+5th%2C+7t
or+the+1st%2C+3rd%2C+5th%2C+7th+sections+to+get+a+high+length%2E+I+put+small+numbers+n
ength%2E+I+put+small+numbers+near+the+corners%2E+The+8%2C5%2C3%2C7+clues+define+knots+1+to+
C7+clues+define+knots+1+to+7%2E+The+2+clue+is+not+needed%2C+but+it+did+give+lots&#
eded%2C+but+it+did+give+lots+of+empty+squares+on+the+long+diagonal%2E+%0D%0AThen+I+switche
g+diagonal%2E+%0D%0AThen+I+switched+to+finding+a+unique+solution+with+small+clues%2E+Thread+le
+with+small+clues%2E+Thread+length+was+less+important+now%2E+Putting+clues+on+the+same+par
;Putting+clues+on+the+same+parity%2Fcolour+diagonals+helped+too%2E+I+found+two+medium+numbers+
43;I+found+two+medium+numbers+%289%2C+13%29+to+finish%2E%0D%0ASP1+and+EKBM+both+had+much+bette
3;and+EKBM+both+had+much+better+clues+than+me%2C+but+my+long+thread+was+important%2E+It
long+thread+was+important%2E+It+is+possible+to+have+length+%3E+100%2C+but+then+you+need
3E+100%2C+but+then+you+need+too+many+big+clues+to+make+it+unique%2E
43;it+unique%2E
SP1
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-29 10:12 PM (#33798 - in reply to #33716) (#33798) Top




Posts: 12

Location: Japan		Riad, thanks for organizing a great contest!
And congratulations to kiwijam for a perfect win!!!
Thanks also to the LMI team for running the event.
I had not participated in this contest for a few years, but I really enjoyed it.

I especially like prob. 7 and 12.
I didn't have time to fix my solution for 12 because it was the last day of the contest when I realized that the length of lines was important.I regret that.
Anyway, I think prob.12 is a really good optimization setup!

I like optimization puzzles very much, and I am very happy to see the April Contest where I can enjoy them.
I'm planning to hold an optimization contest at a local site in Japan.
I hope that the fun of optimization will spread more and more.

Edited by SP1 2025-04-29 10:13 PM
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-04-30 12:43 AM (#33799 - in reply to #33716) (#33799) Top


Moscow Puzzle Cup 2016 Author

Posts: 249
1001002020
Location: Russia		Thanks a lot to everyone!
Congratulations to James, Takuma and Paul!
Success in optimization problems in 2025 earned more points than ever. James had a very impressive victory. Only two participants managed to score points in all optimizations. Takuma, great result! Interestingly written in the two posts above. I wish Takuma success in organizing the optimization contest in Japan.
There were questions like: Why ban word overlapping in Hitori? I think through the answer format so that it is convenient for the organizers. A lot of parentheses can prevent Deb from forming grids with solutions. For clarity, it is better to place the parentheses sequentially. Thanks to the LMI team, Deb and Prasanna, and a special thanks to Kota for the long-term support!
pinkagape
Subject: Re: Riad Khanmagomedov's April Contest — 18th to 27th April 2025 @ 2025-05-03 4:09 PM (#33805 - in reply to #33716) (#33805) Top




Posts: 19

Location: United Kingdom		Thanks Riad and well done James! Are there solutions available to the puzzles? I had a tough time with some of them and was hoping to work through them with the solutions.
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