You can move a piece as many places as there are pieces on this line (line = row, column or diagonal).
If you land on a piece, it will be captured.

Diamond-Deletion Rule:
This rule is similar to the Square-Deletion Rule of game Powerball, but here the squares tilted by 45 degrees: If the target position contains a ball which is part such any 4-ball diamond arrangement, then all 4 balls will be deleted. (Example: balls on a2, b1, b3, c2 or balls on a3, c1, c5, e3).

The colour of the balls has no relevance in this game.

Beginners: You win when only one piece is left.
Advanced: Solve the puzzle using the smallest number of moves, which is displayed at the right border.

Solutions to the fixed variants are attached (select Help/ShowSolution).

 
This is a puzzle in the tradition of the 2-player games Lines Of Action and Zen, where the length of a move is controlled by the number of pieces on that line. Related Zillions games: Powerlines, Squaredance.
The square-deletion rule make Diball more complex than the game Powerlines (and hence more difficult to solve), and it also speeds up the game considerably, especially for setups with a large number of tokens.