The Disappearing Bicyclist: Vintage Puzzle

[AB Editor]

A very old Sam Loyd Puzzle for you:

[AB Editor]

For those who haven't got their specs on:

THE DDISAPPEARING BICYCLIST

Turn the disc so the arrow points to A - and count 13 boys.
Then move the arrow to B - and there are only 12 boys in view.

Which boy vanished? Where does he go?

[Jonathan-Joe]

A working version http://www.murderousm...es/getofftheearth.htm

[sandyRoe]

Does the boy 'A' obstruct our view of boy 'B' when the arrows moved?

[Sipowicz]

Am I missing something? I count 13 both times!

[Psybbo]

8 o'clock merges with 7 o'clock

[Sipowicz]

Ah, I see it on the working version.

[Jonathan-Joe]

It might help if you mention whether your comments are about Ed's post or mine (which you have to look at for a while to see the effect).

[dickythecook]

Thanks for that link JJ. It all makes sense now.

[Hopkirk]

I have stared at JJs link, but can't explain where the 13th boy goes.

Please help me.

[Frank97]

I can see what's going on with the legs, but can't figure out where the head is going.

[Frank97]

Ah, I think I see it now.

[AB Editor]

Thanks for that :)