Quiescent Search

Quiescent Search The Horizon Effect The horizon effect is when a chess engine makes a terrible move because it can’t see past its search depth limit. It’s like looking at a situation and thinking “This is fine!” when disaster is just one move beyond what you can see. Why Fixed-Depth Search Fails Fixed-depth search stops at a specific depth, regardless of what’s happening in the position. Depth 10 search: ├─ Move 1, 2, 3, ... 10 ✓ Search these └─ Move 11 ✗ STOP (even if critical!) Example 1: The Hanging Queen ...