The Checker Maven

April Fool Recap

20160109-aprilfool1943.jpg

This column will appear on April 2, 2016. Yesterday was April 1, or "April Fool's Day," the traditional date for all sorts of stunts and jokes.

On April 1, 1943, the above Norman Rockwell drawing appeared on the cover of The Saturday Evening Post.

Mr. Rockwell did a certain amount of checker art, but in this particular instance, he deliberately riddled the drawing with errors, 43 of them by his count. (How many of them can you find? A larger version of the drawing can be found here.)

Today's problem is more in the nature of a "thought" problem. We know it's possible to construct positions that can't arise on the checkerboard. Here's one taken from "Impossible Settings" in Ben Boland's book, Famous Positions in the Game of Checkers.

BLACK
20160109-imp1.png
WHITE
White to Play
W:W10,31:B1,3.

There are only four pieces in this position, but we'd like to challenge you to find the minimal position that can't possibly arise in play that follows the rules. Can you find an impossible setting with fewer than four pieces?

The picture at the top of this article may give you a clue as to the answer. Click on Read More when you're done fooling with this and wish to see the answer.20050904-symbol.gif



Solution

The following position is the smallest position that can never be achieved in actual play:

BLACK
20160109-aprilfool.png
WHITE
Either to Play!

Yes, an empty board contains zero checkers, and you can't get any smaller than that! There's obviously no way it can actually happen, short of dumping the last lone checker on the floor, which we wouldn't call a legal move.

Was this a suitable April Fool teaser? We hope you found it more amusing than annoying!

And, in case you're wondering, here are the 43 errors in the drawing.

  1. The trout, the fishhook and the water, all on the stairway.
  2. The stairway running behind the fireplace, an architectural impossibility.
  3. The mailbox.
  4. The faucet.
  5. Wall-paper upside down.
  6. Wallpaper has two designs.
  7. The scissors candlestick.
  8. Silhouettes upside down.
  9. Bacon and egg on the decorative plate.
  10. The April-fool clock.
  11. The portraits.
  12. Ducks in the living room.
  13. Zebra looking out of the frame.
  14. Mouse looking out of the mantelpiece.
  15. A tire for the iron rim of the mantelpiece.
  16. Medicine bottle and glass floating in the air.
  17. Fork instead of a spoon on the bottle.
  18. The old lady's hip pocket.
  19. The newspaper in her pocket.
  20. Her wedding ring on the wrong hand.
  21. Buttons on the wrong aide of her sweater.
  22. Crown on her head.
  23. Stillson wrench for a nutcracker in her hand.
  24. Skunk on her lap.
  25. She is wearing trousers.
  26. She has on ice skates.
  27. No checkers on checkerboard.
  28. Wrong number of squares on checkerboard.
  29. Too many fingers on old man's hand.
  30. Erasers on both ends of his pencil.
  31. He is wearing a skirt.
  32. He has a bird in his pocket.
  33. He is wearing roller skates.
  34. He has a hoe for a cane.
  35. Billfold on string tied to his finger.
  36. Milkweed growing in room.
  37. Milk bottle on milkweed.
  38. Deer under chair.
  39. Dog's paws on deer.
  40. Mushrooms.
  41. Woodpecker pecking chair.
  42. Buckle on man's slipper.
  43. Artist's signature in reverse.

04/02/16 - Category: General - Printer friendly version
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