A new puzzle every Saturday. Solutions one week later.

>>>>Basic Stats<<<<
Oct.-3-2026
1480 weeks, 1511 pages & 10360 days
28 years 3 Months 10 days
Since May 23 1998

Puzzle of the week

Puzzle 1283 A kind of flip side of Puzzle 1282

Curios by CR in Prime Curios!

(updated on April 30, 2021)

Latest ten news

No.

Date Puzzle about

Solvers

10 Oct-2-26 Puzzle 1278

Puzzle 897
Puzzle 899
Roberto Scalone

Tatsuru Watanabe
Tatsuru Watanabe
9 Sep.-25-25 Puzzle 1282

Links & Puzzle 1279
Michael Branicky

C. Rivera has updated his Covering Sets Calculador
8 Sep.-11-26 Conjecture 113

Puzzle 71
Alain Rochelli

Diego González Gauss
7 Sep.-4-26 Puzzle 1281  Rahid Zaman, Michael Branicky, Giorgos Kalogeropoulos, Paul Cleary, Michael Hürter
6 Aug-28-26 See The Links page.



Puzzle
Coll20th-20


Problem 92
C. Rivera updates his two Calculators online:
CS Calculator V8 and 3NCS2.

Giorgos Kalogeropoulos/Rahid Zaman

Eric Brier
5 Aug-21-26 Puzle 1279 Arkadiusz Wesoloski, Carlos Rivera
4 Aug-14-26 Puzzle 1279

Problem 92
Emilia Gurisatti, Carlos Rivera

Emilia Gurisatti
3 Aug-7-2026 Puzzle 1278 Roberto Carlo Angelone
2 July-31-2026 Puzzle 1277 Paul Cleary, Michael Hürter, Giorgos Kalogeropoulos
1 July-24.2026 Puzzle 1276


Puzzle 1275
Ashaz Jameel, Paul Cleary, Oscar Volpatti, Giorgos Kalogeropoulos.

Ankit Chakraborty.

Carlos Rivera (about a new & larger Magic square, 19683x19683, sent by Roberto Carlos Angelone)

 


These pages will be updated every Saturday morning -- Last Modified on: Friday, 02-Oct-2026 17:35:25 MST

"Many thanks to Martha Rivera, Miguel H. Rivera and  G. L. Honaker, Jr. for reviewing and correcting the  very first version of these pages, dated on May 23, 1998 "

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