Try to place 8 queens on a chessboard so that no two queens attack each other! Basically, no two pieces can share a row, column or diagonal. It's harder than it sounds. This makes a great bell ringer challenge! Students will get competitive trying to find their own unique solution. Great extra curricular fun tied to problem solving, logic, chess, etc.
This is a Windows Application (requires the .net framework... likely already installed if you're running windows, but available for free at the Microsoft Download Centre.
**Watch the preview screen-capture video of the program in use**.
->easy to use (drag and drop), and fun to play
->save your solutions (erased if program is closed)
->rotate and reflect your solutions
->Answer Check built in
->Hint feature built in
This puzzle was first published in 1848, and has since attracted mathematicians and computer programmers alike. I first tried to solve it when I was in grade 5 with a few of my friends. We felt like geeks, having technical discussions about whether a solution was still unique if it was shown to be a reflection or rotation of another solution. Having grown up, I revisited this problem in university via computer programming. Finally I have laid to rest my childhood dilemma... "How many solutions are there??"
"The eight queens puzzle is the problem of placing eight chess queens on an 8×8 chessboard so that no two queens attack each other. Thus, a solution requires that no two queens share the same row, column, or diagonal." (http://en.wikipedia.org/wiki/Eight_queens_puzzle)