U-Turn

From Fantastic Wiki

Level screenshot.

U-Turn is the 21st, and last, free level. The goal circle must go through a U-turn tube or go around and into the end of the tube. Internally, its level ID is 4575. Play.

[edit] History

The level was the winning entry authored by Paul Henshall Jr. (username onion) for the level 21 contest on the Fantastic Contraption forum. Weasel and pacifist selected U-Turn because its difficulty was on par with the other official levels, and because it had the potential for a variety of different solutions.

The selection of U-Turn to be level 21 sparked controversy because it was judged by many to be easier than level 20 (Unpossible). Pacifist and weasel were aware of this when they had selected it, but renumbering the existing levels would have been more of a headache than it was worth.

[edit] Level Statistics

Build areas	1
Goal areas	1
Static rectangles	34
Static circles	32
Dynamic rectangles	0
Dynamic circles	0
Goal rectangles	0
Goal circles	1
Total	69

[edit] Designs & Badges

The following badges are the state of the art (Items/Ticks Author):

U-Turn	Solved	Green	Brown	Water
Solved	3/569 riffplayer	8/968 GreenTime	↓	↓
Clean	4/614 MrZNF	→	→	20/616 GreenTime
Champ	4/633 Morrbo	→	11/141 DMarden117	20/772 GreenTime
Boom	→	9/1158 DMarden117 10/129 Magnum1000	10/176 DMarden117	?
	13/78 WizBang	?	?	?
	5/105 WizBang	?	?	?
Infinite	7/538 WizBang	?	?	?

An arrow means that an entry in the direction pointed to also fulfils this entry. Ordered by number of items then by number of ticks. A "?" means a solution has not yet been found. An "X" means a solution is not possible. "" is an Infinite Boomerang which oscillates Champion / Boomerang for 20 cycles or more, if less than 20 then prefixed by "x2" etc. Sweep and Lightning are not relevant to this level. Pilot , Unconnected and Handsoff are additionally listed within a cell. Selected extra information is included by hovering over any trailing "!".

[edit] Other challenges

Fastest solution: 28 ticks, 52/28 sccook
Slowest solution that does eventually achieve victory: 230,118 ticks, 23/230118 mtdewd
Fewest pieces: 3 pieces, 3/569 riffplayer
Solve the remaining "?" entries or prove them impossible.
Improve on the solutions already listed above, either in number of pieces or in number of ticks for the same number of pieces.
Produce hands-off and/or pilot and/or unconnected solutions where there is no entry in the table above.