Logic Masters Deutschland e.V.

Rules

• Starting at the black diamond, draw a directed path through the centres of some cells in the grid. Path segments are drawn sequentially from cell to cell, such that the first path segment is drawn from the black diamond to an adjacent empty cell, the second segment is drawn from that cell to the next empty cell, and so on until the final segment is drawn and the path ends.
• The path cannot branch or revisit a cell it has visited before.
• Every time the path enters a new cell, a “recoiled cell” is placed in the first empty cell in the opposite direction. This recoiled cell may skip over gaps in the grid, other recoiled cells, or other path cells.
• The path cannot enter a cell if its corresponding recoiled cell cannot be placed into the grid.
• All cells of the grid must be visited by the path or contain a recoiled cell.

In the example below a simple Recoil puzzle is shown. All the recoiled cells are in grey. Please notice how the recoiled cells work for the last two steps of the path: r2c1 is the last recoiled cell of the entire puzzle because it's the nearest empty cell in the opposite direction of the last step.