QUEENS AND BISHOP PUZZLE
It will be seen that every square of the board is either occupied or attacked. The puzzle is to substitute a bishop for the rook on the same square, and then place the four queens on other squares so that every square shall again be either occupied or attacked.

Topics:
Logic
->
Reasoning / Logic
Combinatorics
->
Case Analysis / Checking Cases
->
Processes / Procedures
Puzzles and Rebuses
- Amusements in Mathematics, Henry Ernest Dudeney Question 313
There are no comments yet.