The Eight Queens
Logic puzzles require you to think. You will have to be logical in your reasoning.
One of the most famous logic puzzles is the "Eight Queens puzzle". The object of this puzzle is to place 8 chess queens on a standard 8x8 chessboard so that no queen can be captured by any of the other queens.
Logically, no queen can share the same row, column, or diagonal with any other queen.
Can you discover an arrangement that works?
Answer
There are actually 12 completely unique solutions to this puzzle (unique meaning not simply rotating or flipping the board).
Using a standard system of numbering rows 1-8 moving away from the player and noting columns with letters a-h, here are the solutions:
1) a1, g2, e3, h4, b5, d6, f7, c8
2) a1, g2, d3, f4, h5, b6, e7, c8
3) c1, a2, g3, e4, h5, b6, d7, f8
4) d1, a2, e3, h4, b5, g6, c7, f8
5) e1, a2, h3, d4, b5, g6, c7, f8
6) e1, a2, d3, f4, h5, b6, g7, c8
7) e1, a2, h3, f4, c5, g6, b7, d8
8) e1, c2, a3, g4, b5, h6, f7, d8
9) e1, g2, a3, d4, b5, h6, f7, c8
10) f1, a2, e3, b4, h5, c6, g7, d8
11) f1, c2, a3, h4, d5, b6, g7, e8
12) g1, a2, c3, h4, f5, d6, b7, e8
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Comments
sioga
Nov 15, 2007
| that was easy with a chess board.but this is not fair for those who never play chess before. |
jamesbond  
Nov 25, 2007
| nice one...have seen that before...but never knew it had 12 unique solutions...thanks keep it up!  |
zeepuzzlemaster 
Nov 25, 2007
| lol the answer to the question is yes  |
dswilborn
Jun 21, 2008
| There was a game on Yahoo that tested your ability to place eight pieces on the chess board. |
DarthKaan 
Feb 23, 2010
| What about: h1, f2, d3, b4, g5, e6, c7, a8? |
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