Problema del lieto fine

Happy Ending problem - problem about proving that five points in the plane will have a subset forming the vertices of a convex quadrilateral. Article “Problema del lieto fine” in Italian Wikipedia has 10.5 points for quality (as of July 1, 2026). The article contains 2 references and 2 sections. The article also contains templates indicating quality issues, therefore its score was reduced by 0.56 points.

This article has the best quality in Greek Wikipedia. However, the most popular language version of this article is English.

Since the creation of article “Problema del lieto fine”, its content was written by 2 registered users of Italian Wikipedia and edited by 184 registered Wikipedia users in all languages.

The highest Authors Interest rank from 2001:

• Local (Italian): #28213 in April 2026
• Global: #48719 in February 2015

The highest popularity rank from 2008:

• Local (Italian): #707423 in April 2026
• Global: #205714 in March 2013

There are 16 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Greek (el) Πρόβλημα με το αίσιο τέλος		34.3179
2	English (en) Happy ending problem		32.4108
3	Hungarian (hu) Happy End-probléma		31.9907
4	Catalan (ca) Problema del final feliç		29.8206
5	Persian (fa) مسئله پایان خوش		22.8789
6	Korean (ko) 해피 엔딩 문제		22.7232
7	Spanish (es) Problema del final feliz		22.3565
8	French (fr) Happy Ending problem		21.6948
9	Chinese (zh) 幸福結局問題		18.215
10	Russian (ru) Задача со счастливым концом		16.4177

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "Problema del lieto fine" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Happy ending problem		366 188
2	Russian (ru) Задача со счастливым концом		38 587
3	Chinese (zh) 幸福結局問題		26 782
4	Spanish (es) Problema del final feliz		19 114
5	Arabic (ar) مسألة نهاية سعيدة		12 446
6	French (fr) Happy Ending problem		11 672
7	Hungarian (hu) Happy End-probléma		10 934
8	Persian (fa) مسئله پایان خوش		4 701
9	Portuguese (pt) Problema do final feliz		4 645
10	Thai (th) ปัญหาแฮปปี้เอ็นดิ้ง		4 267

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The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Problema del lieto fine" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) Happy ending problem		1 247
2	Chinese (zh) 幸福結局問題		116
3	Russian (ru) Задача со счастливым концом		80
4	French (fr) Happy Ending problem		57
5	Persian (fa) مسئله پایان خوش		52
6	Hungarian (hu) Happy End-probléma		38
7	Spanish (es) Problema del final feliz		29
8	Korean (ko) 해피 엔딩 문제		29
9	Ukrainian (uk) Задача зі щасливим кінцем		11
10	Italian (it) Problema del lieto fine		9

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The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Problema del lieto fine" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Happy ending problem		60
2	French (fr) Happy Ending problem		22
3	Chinese (zh) 幸福結局問題		15
4	Spanish (es) Problema del final feliz		14
5	Hungarian (hu) Happy End-probléma		13
6	Russian (ru) Задача со счастливым концом		12
7	Persian (fa) مسئله پایان خوش		9
8	Finnish (fi) Erdősin-Szekeresin konjektuuri		7
9	Thai (th) ปัญหาแฮปปี้เอ็นดิ้ง		7
10	Catalan (ca) Problema del final feliç		6

More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Problema del lieto fine" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	Hungarian (hu) Happy End-probléma		1
2	Chinese (zh) 幸福結局問題		1
3	Arabic (ar) مسألة نهاية سعيدة		0
4	Catalan (ca) Problema del final feliç		0
5	Greek (el) Πρόβλημα με το αίσιο τέλος		0
6	English (en) Happy ending problem		0
7	Spanish (es) Problema del final feliz		0
8	Persian (fa) مسئله پایان خوش		0
9	Finnish (fi) Erdősin-Szekeresin konjektuuri		0
10	French (fr) Happy Ending problem		0

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The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Problema del lieto fine" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Happy ending problem		21
2	Russian (ru) Задача со счастливым концом		14
3	Ukrainian (uk) Задача зі щасливим кінцем		9
4	French (fr) Happy Ending problem		7
5	Spanish (es) Problema del final feliz		5
6	Hungarian (hu) Happy End-probléma		5
7	Chinese (zh) 幸福結局問題		5
8	Catalan (ca) Problema del final feliç		4
9	Arabic (ar) مسألة نهاية سعيدة		2
10	Persian (fa) مسئله پایان خوش		2

More...

#	Language	Value
ar	Arabic مسألة نهاية سعيدة
ca	Catalan Problema del final feliç
el	Greek Πρόβλημα με το αίσιο τέλος
en	English Happy ending problem
es	Spanish Problema del final feliz
fa	Persian مسئله پایان خوش
fi	Finnish Erdősin-Szekeresin konjektuuri
fr	French Happy Ending problem
hu	Hungarian Happy End-probléma
it	Italian Problema del lieto fine
ko	Korean 해피 엔딩 문제
pt	Portuguese Problema do final feliz
ru	Russian Задача со счастливым концом
th	Thai ปัญหาแฮปปี้เอ็นดิ้ง
uk	Ukrainian Задача зі щасливим кінцем
zh	Chinese 幸福結局問題

Best Rank

Italian: #707423 04.2026

Global: #205714 03.2013

Best Rank

Italian: #28213 04.2026

Global: #48719 02.2015

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The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information