Probabilistic Focal Search: Accelerating Bounded‑Suboptimal Search through Lower‑Bound Advancement

Executive Takeaway On 12 September 2026, a team of AI researchers released arXiv cs.AI (Artificial Intelligence) announcement describing Probabilistic Focal Search (PFS), a stochastic extension of classic Focal Search. By expanding a minimum‑$f$ node with probability $1-p$ while following the deterministic FS policy with probability $p$, PFS forces the lower bound $f_{min}$ to advance more aggressively. Empirically, […]