Some knowledge about the Game of GO and the detailed instructions below is all you need for solving the coordinates. Nothing is really hidden, even the secret key is given below (yes, it is!).
The Coordinates :
Every time either Black or White captures stones(s) record the number of captured stones (Ci). Form a single (largish) number A = (C1C2C3..Cn). NO multiplication, just all your recorded numbers, one after another.
You have most probably found the correct solution if @move #199 ! Black can capture a large number of white stones: the last number (Cn) you write down must be clearly larger than any of the previous numbers. Now find the 4 prime factors of A: A=p1*p2*p3*p4 , (p1 < p2 < p3 < p4 ) and form the number D = (p1p2p3p4) .
!D is NOT a phone number , don't try to call it!
The final coordinates:
Ncmirury Epiktko
Use the key:"proakubotshichomygod" with the number D to decode the final coordinates.
Good luck! The GO - problem is challenging, but solvable. You don't need any deep understand of any special rules (like "ko" or "seki"), just understanding basic concepts of life and death and how stones are captured should be enough.
As always, the WWW may offer some shortcuts to the solution.
