From 3d5d66a401d4095f9336d442bb4ef7c3a3acaaa6 Mon Sep 17 00:00:00 2001
From: doruk <dsekercioglu2003@gmail.com>
Date: Fri, 14 Jan 2022 19:22:53 +0300
Subject: [PATCH] Deeper SEE pruning

---
 src/bm/bm_search/search.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/bm/bm_search/search.rs b/src/bm/bm_search/search.rs
index 178bafc5..e5df10da 100644
--- a/src/bm/bm_search/search.rs
+++ b/src/bm/bm_search/search.rs
@@ -398,9 +398,11 @@ pub fn search<Search: SearchType>(
             In non-PV nodes If a move evaluated by SEE isn't good enough to beat alpha - a static margin
             we assume it's safe to prune this move
             */
-            let do_see_prune = !Search::PV && !in_check && depth <= 2;
+            let do_see_prune = !Search::PV && !in_check && depth <= 7;
             if do_see_prune
-                && eval + StdEvaluator::see::<16>(&board, make_move) + SEARCH_PARAMS.get_fp()
+                && eval
+                    + StdEvaluator::see::<16>(&board, make_move)
+                    + SEARCH_PARAMS.get_fp() * (depth as i16)
                     < alpha
             {
                 continue;