202 real-game puzzles in this collection
What is a interference?
Interference cuts the line between two enemy pieces that defend each other, usually by planting a piece on the intersection square. Both severed halves then hang at once.
How to spot it
Map which enemy pieces rely on a shared rank, file or diagonal for defense. A sacrifice on the crossing point breaks the connection and wins material by force.
What this set trains
These are subtle puzzles that reward geometric thinking — seeing defensive lines as wires you can cut.
Foundation: 16Developing: 45Challenging: 53Advanced: 88