1. N

    POW card counting game

    Hello all. Please forgive me if I do not post in accurate mathematical language. My last math was a beginning calculus course in 1979. My first dilemma is whether to post irrelevant background. I shall do so. Please skip to paragraph 3 if you do not care. My son (5th year engineering senior at...
  2. T

    Need help on POW 12: The Big Knight Switch

    The problem is that you have a 3x3 checkboard and you have 2 black knights on 2 corners and 2 white knights on the other corners. The goal is to switch them around in the least amount of moves. The white knights are at the corners where the black knights were and vice-versa. Help me with this...