Tentaizu is Japanese for "celestial map." In the grid below, stars are hiding in 10 of the 49 squares. Your task is to determine the positions of the stars. A number in a square indicates how many stars lie adjacent to the square, either up, down, or diagonally. The logic in this game is similar to the Windows game Minesweeper. No square with a number in it contains a star, but a star may appear in a square with no adjacent numbers.
Once you have located the 10 stars in the grid, use the following formulas to solve for the final coordinates. The column numbers (1 to 7) are numbered from left to right. The stars are numbered (1 to 10) from left to right, then top to bottom.
a = column number of third star
b = column number of tenth star + column number of third star
c = column number of seventh star + column number of eighth star
d = column number of fourth star - column number of eighth star
e = column number of third star + column number of fifth star
f = column number of first star
Final coordinates are N 47 42.abc and W 122 19.def.
You can check your answers for this puzzle on GeoChecker.com.