fix longstanding negamax bug

we needed to be saving the alpha before the search loop in which we modified it. At this point, though i can't remember, i expect that this is the cause of whatever "instability" the comment was talking about that would have prevented us from using >= in the TT lookup.

1 files changed, 5 insertions, 5 deletions

diff --git a/.gitignore b/.gitignore
index bf3831d..52a279d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,9 @@
 *.o
 data/
-ct1986
-ctlm
-pptdb
-cttei
-geminict
+ct1986*
+ctlm*
+pptdb*
+cttei*
+geminict*
 buildroot*
 .cache