Ok let's start from the top...
We have multiple cryptic codes in the comments, let's try to regroup them:
:
A9539 \\
B2919 /\\
C4882 /\
D4627 \
E6758 \
F???? ////
A5989 \\
B5176 \
C2863 \
D2558 //\
E3413 \
F???? ////
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We believe those stand for a "mastermind" code and that the ???? stand respectively for
8992 and
8554
:
/\//\\//5,1:4.1,2:8.1,3:2.3,3:2.4,3:3.7,3:3.1,5:3.4,5:9.5,5:2.7,5:4.7,6:6.3,7:3.
\\\\/\2,1:2.3,1:2.6,1:4.1,2:4.3,2:2.3,4:4.5,5:2.6,5:3.7,5:3.4,7:8.5,7:3.7,6:4.
\///\//\1,1:3.4,1:2.6,1:9.2,2:2.6,2:2.2,4:4.3,5:2.5,5:2.7,5:3.4,7:3.6,7:2.7,7:2.
\\//\\\/4,2:6.6,2:4.7,3:3.2,4:8.3,4:2.4,4:2.7,4:3.2,6:2.4,6:3.6,6:2.1,7:4.3,7:2.
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Those are most likely coordinates that need to be mapped on the grid, indeed using the x,y:v (or y,x:v) format you can see that x and y stay in the 1-7 range which is the same size as the grid.
The '/' and '\' characters could indicate there is also some kind of mastermind selection to be done on the values as some cells contain multiple values.
My guess is that we somehow need to find which value goes where in the grid and then only keep the cells that have pieces of the logo. By reconstructing the logo we could have an other code with hopefully contains some signification.
:
\\//\/KDIUTHANPUYHHDQOEPLNDOALJGUDITHBBDOZLGFERKJGLSAOE
\////JUTYROSLNGNALEHGNWOTIQPOKSDNTPNOJAWEOBNGLAWKJNWNR
\\\/\\JHWUITUHABSJGNEWKLALNVGJKWELKJLWQQPRUTJHJJSBFMMH
///\\/JQEABTVKNUCSEYCMBILDKOSCYSITECPAGFAXHKETJNZURWCIE
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Again the '/' and '\' characters but I don't have a clue on how to start decoding those.
Is this a key to be used? I don't know.
:
7777338883366899984477733 33
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I've played with this one a bit and came up with the following result by counting the number of same numbers (so 7777 translates to 4 times 7 -> 47)
47 23 38 23 26 18 39 18 24 37 23 10 23
Not sure it will lead us anywhere especially as we have 8 and 9 numbers which means they are not coordinates for the grid.