Calculating variant 518 starting position

Debunking Wiki description of Scharnagl's methods (if you talking division, then do divide instead of illustrating divisions with reverse multiplications which will confuse every unsuspecting reader of this description)

518:16=32+6

where 6 is the bishop's code

               Scharnagl's Bishop's Table
-
  0  BB------   4 -BB-----   8 -B--B---  12 -B----B-
  1  B--B----   5 --BB----   9 ---BB---  13 ---B--B-
  2  B----B--   6 --B--B--  10 ----BB--  14 -----BB-
  3  B------B   7 --B----B  11 ----B--B  15 ------BB

Then divide q1 by 6

32:6=5+2

For any SP, after skipping over the bishop's, the queen may occupy any one of six possible squares, and they are numbered from left to right (from White's perspective) 0,1,2,3,4,5.

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q2 gives the N5N code, so put the knights on the board (of course skipping over the bishops and queen).

Scharnagl's N5N Table

0	NN---	5	-N-N-
1	N-N--	6	-N--N
2	N--N-	7	--NN-
3	N---N	8	--N-N
4	-NN--	9	---NN

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External links 

1. The Chess960 Numbers Decoded
2. Chess960 Start Positions