From b08fd615f7d38634db9b5bc6cce041dc0c701e06 Mon Sep 17 00:00:00 2001
From: Julian Blank <blankjul@msu.edu>
Date: Sat, 25 Nov 2023 16:50:29 -0800
Subject: [PATCH] SBX: Setting prob_exch by default to 1.0

I have noticed some performance issues by being more greedy and setting this to 0.5.
Thus, I have decided to change the default back to 1.0 as it is implemented in the original NSGA2.
(this leads to more exploration now)
---
 pymoo/operators/crossover/sbx.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pymoo/operators/crossover/sbx.py b/pymoo/operators/crossover/sbx.py
index 41a1c025a..7be256113 100644
--- a/pymoo/operators/crossover/sbx.py
+++ b/pymoo/operators/crossover/sbx.py
@@ -89,7 +89,7 @@ class SimulatedBinaryCrossover(Crossover):
     def __init__(self,
                  prob_var=0.5,
                  eta=15,
-                 prob_exch=0.5,
+                 prob_exch=1.0,
                  prob_bin=0.5,
                  n_offsprings=2,
                  **kwargs):