SPIN
SPIN
Level 03 · Fourteen Before. Two rings left on the bar, fifty-six moves from a bare one, and neither move you have can take a ring off.
- 01Tap a ring to lift it off the bar, or to drop it back on.
- 02The bar starts part-way along the path this time, with four rings already off.
- 03LEFT reads fifty-six, and all six rings on was forty-two. Rings off is not progress.
SPIN, Two moves to choose from. Never stuck.
Rings threaded onto one long bar. A ring may only come off, or go back on, when the ring beside it is on and everything past that is off, and the ring at the free end has nothing past it, so it may always move. That rule leaves exactly two legal moves from every position, one forward and one back, which means every position lies on a single path with no branch anywhere. So you can never be stuck here. You can only be pointed the wrong way, and the count on screen is the first in the arcade that is exactly right rather than a floor: it says how many moves are left, and in its last digit, which of the two to play.
- 01Tap a ring to lift it off the bar, or to drop it back on.
- 02Only two rings can ever move: the one at the free end, and exactly one other.
- 03LEFT is the moves still to come, exactly. Get every ring off and it reads zero.
- Level 01 · Forty-Twopar 42
Six rings on, two moves to choose from at every step, and forty-two of them. One of the two is always wrong.
- Level 02 · Sevenpar 85
One more ring, and the always-legal move that level 1 called wrong is the right one. The last digit of LEFT was naming it all along.
- Level 03 · Fourteen Beforepar 56
Two rings left on the bar, fifty-six moves from a bare one, and neither move you have can take a ring off.
controls: Tap a ring to lift it off the bar, or drop it back on
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