From a8a680b9444dba1d390d2ad312a5e7bb1d5b2026 Mon Sep 17 00:00:00 2001
From: dece <shgck@pistache.land>
Date: Sat, 6 Jun 2020 01:28:05 +0200
Subject: [PATCH] engine: fix evaluation formula typo

---
 src/engine.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/engine.rs b/src/engine.rs
index 46b0c8c..05703f0 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -346,7 +346,7 @@ fn evaluate(stats: &(board::BoardStats, board::BoardStats)) -> f32 {
     + 3.0 * (ws.num_bishops - bs.num_bishops) as f32
     + 3.0 * (ws.num_knights - bs.num_knights) as f32
     + (ws.num_pawns - bs.num_pawns) as f32
-    + 0.5 * (  // FIXME
+    - 0.5 * (
         ws.num_doubled_pawns - bs.num_doubled_pawns +
         ws.num_isolated_pawns - bs.num_isolated_pawns +
         ws.num_backward_pawns - bs.num_backward_pawns