Route Solution

Thalamorph Rally 2018

Route Card 5 (24)

Route Card 5 (24)

Plotting Boundaries: (E 320500, N 282900) to (E 334000, N 273500)
This is a Redo Route Card.
There are 20 PCs on route.

There are 24 ways to describe the passage through the four sides (NSEW) of a grid square. Enter from any side, leave from any side = 16; start in a square and leave to a side = 4; enter in a side and finish in a square = 4. I have ordered these combinations in a particular (logical) way and numbered them from 01 to 24. Now go CROW via:

TC1 @ T in GS3176

01  23  11  22  19  07  16  24  06  22  19  08  14  07  16  24  07  17  19  08  13  11  
23  14  09  08  11  24  08  14  07  17  19  07  16  22  19  07  18  13  13  13  14  08  
13  14  07  19  07  17  19  07  16  22  16  22  19  07  18  14  07  18  13  13  13  14  
06  24  07  19  07  16  22  17  19  08  12  19  08  13  11  23  14  08  11  21  23  11  
21  23  13  10

EOR @ 100 metres after last instruction

Route Card Commentary

Time for some logical deduction. This is the required scheme of 24:

000000000111111111122222
123456789012345678901234
----EEEEENNNNNSSSSSWWWWW
ENSW-ENSW-ENSW-ENSW-ENSW

CROW upset a few competitors. This was not a CRO typo! Look at the list of abbreviations (Regulation 19) = Coloured Roads One White.
PC16 was on the one, and only, white that fitted the instructions.

The hints were: 1) The numbering starts: -E(01) -N(02) -S(03) -W(04) E-(05) EE(06) EN(07) ES(08) EW(09) 2) The full sequence is:
-E,WS,NE,WN,SW,EN,SE,WW,EE,WN,SW,ES,NW,EN,SE,WW,EN,SN,
SW,ES,NS,NE,WS,NW,EW,ES,NE,WW,ES,NW,EN,SN,SW,EN,SE,WN,
SW,EN,SS,NS,NS,NS,NW,ES,NS,NW,EN,SW,EN,SN,SW,EN,SE,WN,SE,
WN,SW,EN,SS,NW,EN,SS,NS,NS,NS,NW,EE,WW,EN,SW,EN,SE,WN,SN,
SW,ES,NN,SW,ES,NS,NE,WS,NW,ES,NE,WE,WS,NE,WE,WS,NS,N-

Best performance: Ewan Leeming 36:39.