Mathematical problems | Mathematical chess problems | Recreational mathematics | Enumerative combinatorics
The eight queens puzzle is the problem of placing eight chess queens on an 8×8 chessboard so that no two queens threaten each other; thus, a solution requires that no two queens share the same row, column, or diagonal. There are 92 solutions. The problem was first posed in the mid-19th century. In the modern era, it is often used as an example problem for various computer programming techniques. The eight queens puzzle is a special case of the more general n queens problem of placing n non-attacking queens on an n×n chessboard. Solutions exist for all natural numbers n with the exception of n = 2 and n = 3. Although the exact number of solutions is only known for n ≤ 27, the asymptotic growth rate of the number of solutions is (0.143 n)n. (Wikipedia).
Place eight stones on an 8x8 grid so that NO two stones are in the same row, column, or diagonal (even the small diagonals). Read more about the Eight by Eight Puzzle here: http://theothermath.com/index.php/2020/03/24/eight-by-eight/
From playlist Games and puzzles
Next puzzle: http://www.youtube.com/watch?v=2jbw3Ul6VqE Solution: http://www.youtube.com/watch?v=W8NcQXsBhhI Previous puzzle: http://www.youtube.com/watch?v=BuMqoCPX9ms Music by Bertrand Laurence http://www.bertrandlaurence.com used with permission. Find me on FaceBook: https://www.faceboo
From playlist Tricks and Math Puzzles
Here's one of the solutions to http://www.youtube.com/watch?v=nTgIXAfdKNU Next puzzle: http://www.youtube.com/watch?v=2jbw3Ul6VqE Music by Bertrand Laurence http://www.bertrandlaurence.com used with permission. Find me on FaceBook: https://www.facebook.com/YouTubeTyYann
From playlist Tricks and Math Puzzles answers
My version of the classic Four Four Puzzle. Next puzzle: http://www.youtube.com/watch?v=3SH7umD5m40 Solution: http://www.youtube.com/watch?v=3WT-QBKnhj0 The Six Math Problem: http://www.youtube.com/watch?v=xM_WDs6HsQQ A Pi Day Puzzle: http://www.youtube.com/watch?v=ReTcFuP0Ahk Previous puz
From playlist Tricks and Math Puzzles
Next puzzle: http://www.youtube.com/watch?v=7F9mc0I-U0o Previous puzzle: http://www.youtube.com/watch?v=Y2xS6oEm268 Solution: http://www.youtube.com/watch?v=8yI5dzWO13M Music by Bertrand Laurence http://www.bertrandlaurence.com used with permission. Find me on FaceBook: https://www.faceboo
From playlist Tricks and Math Puzzles
Seven dots math puzzle solution
Here is the solution to my 7 dots and 6 triplets math puzzle: http://www.youtube.com/watch?v=LRrDIeDdRI8 I hope you enjoyed it! Next puzzle: http://www.youtube.com/watch?v=lGRqGLMWcns
From playlist Tricks and Math Puzzles answers
#MegaFavNumbers: 4x4x4 Snake Cube Square Enumeration
How many uniques snakes exist that can form both an 8x8 square and a 4x4x4 cube? #MegaFavNumbers https://hal.archives-ouvertes.fr/file/index/docid/172308/filename/ham_chains_v1.pdf https://iopscience-iop-org.ezproxy.library.wisc.edu/article/10.1088/1751-8113/49/36/369501/pdf
From playlist MegaFavNumbers
A fun number pattern built from the number 987654321
From playlist Number Patterns
Puzzle 8: You Won't Want to Play Sudoku Again
MIT 6.S095 Programming for the Puzzled, IAP 2018 View the complete course: https://ocw.mit.edu/6-S095IAP18 Instructor: Srini Devadas Are Sudoku puzzles too difficult or tedious for you? Would you rather write a computer program that solves any Sudoku puzzle in a matter of minutes, perhaps
From playlist MIT 6.S095 Programming for the Puzzled, January IAP 2018
Puzzle 6: A Profusion of Queens
MIT 6.S095 Programming for the Puzzled, IAP 2018 View the complete course: https://ocw.mit.edu/6-S095IAP18 Instructor: Srini Devadas Can you place N queens on a board with N columns and N rows so no two queens threaten each other? The 8 queens problem on a chessboard is a special case. Pr
From playlist MIT 6.S095 Programming for the Puzzled, January IAP 2018
A number pattern that results in numbers with 8 for a digit
From playlist Number Patterns
Puzzle 5: Keep Those Queens Apart
MIT 6.S095 Programming for the Puzzled, IAP 2018 View the complete course: https://ocw.mit.edu/6-S095IAP18 Instructor: Srini Devadas Can you place eight queens on a chessboard so no two queens threaten each other? Is this even possible? Prof. Devadas explains how to write a computer progr
From playlist MIT 6.S095 Programming for the Puzzled, January IAP 2018
Lecture 16 - Backtracking - Problem Discussion
This is Lecture 16 of the COMP300E (Programming Challenges) course taught by Professor Steven Skiena [http://www.cs.sunysb.edu/~skiena/] at Hong Kong University of Science and Technology in 2009. The lecture slides are available at: http://www.algorithm.cs.sunysb.edu/programmingchallenges
From playlist COMP300E - Programming Challenges - 2009 HKUST
Phistomefel returns to Cracking The Cryptic today with his usual stunning puzzle. You can play it here: https://cracking-the-cryptic.web.app/sudoku/Bqpmrr229Q Rules: Normal sudoku rules apply. A number in the upper left corner of a cage indicates the sum of all digits within the cage. Di
From playlist Phistomefel Puzzles
LambdaConf 2015 - Introduction to Constraint Logic Programming Sergii Dymchenko
Constraint logic programming is a paradigm that allows solving hard combinatorial problems with minimal programming effort. In this workshop you will learn the basics of the Prolog-based constraint logic programming system ECLiPSe, solve several puzzles, and get hints how constraint logic
From playlist LambdaConf 2015
Here's where you can try today's Genuinely Approachable Sudoku puzzles: GAS 91 – Multiplication by Sam Cappleman-Lynes: https://tinyurl.com/3akz5m2w Normal sudoku rules apply. In each marked 2x2 box, the two digits on the top row multiply to give the two-digit number in the bottom row. G
From playlist All the GAS - Genuinely Approachable Sudokus
A first chess lesson for a math professor -- featuring @Chess Vibes
Teaching an elite chess player math: https://youtu.be/72nV5EfmzEo Chess Vibes: https://www.youtube.com/c/ChessVibesOfficial Suggest a problem: https://forms.gle/ea7Pw7HcKePGB4my5 Please Subscribe: https://www.youtube.com/michaelpennmath?sub_confirmation=1 Patreon: https://www.patreon
From playlist Collaborations
I made a puzzle, I made props, I made a video. But can you work it out?
From playlist My Maths Videos
Stones on an Infinite Chessboard - Numberphile
Another curious puzzle and number sequence from Neil Sloane. More of our videos with Neil: http://bit.ly/Sloane_Numberphile More links & stuff in full description below ↓↓↓ Neil Sloane is founder of the On-Line Encyclopedia of Integer Sequences: https://oeis.org More of our videos with N
From playlist Neil Sloane on Numberphile