The goal of the Pearls puzzle is to draw a single continuous non-intersecting loop that properly passes through all the "pearls". There are black and white pearls, each color having it's own constraints as to how the line must pass through them.
The rules are simple:
Figure 1 below shows a simple 6x6 puzzle and Figure 2 shows its solution.
|Figure 1||Figure 2|
In Figure 3, there are two errors with the solution. The first is that the loop is not
continuous and the second is that the line through the white pearl (marked with a red x) does not turn at either
end. (It may turn at both ends but at least at one.)
In Figure 4, there are also two errors. The line does not pass through the white pearl (marked with x) and also the line above the black pearl does not travel straight through the cell above.
|Figure 3||Figure 4|