Line 1: Either Z or 7 is correct, but neither is in the right position

Line 2: I guessed Z, and put it in another position which turned out to be correct. E is also correct, but I'm not sure which position is right.

Line 3: E is in the wrong position (white dot), 8 is eliminated.

Line 4: I've nailed E and Z, one of the S's is in the right position.

Line 5: S, E, and Z are in the right positions, either F is in the right position.

Line 6: (SEZFJ) I tried the J now, in the last position. I now know that I have all the correct letters/numbers, and I know that F in the last position must be correct.

Find815.com is the Web site that has clues and puzzles that supposedly will reveal some secrets behind the "Lost" TV series. Season 4 starts the end of this month.

In case you're stuck with "Fix the Chart Plotter" puzzle in Chapter 2, here's the solution: