diff --git a/engine/search.hpp b/engine/search.hpp
index 18aad3a7..6a57764e 100644
--- a/engine/search.hpp
+++ b/engine/search.hpp
@@ -11,18 +11,18 @@
 // we can afford to lose RFP_THRESHOLD eval units per ply
 // and still be in a better position. The lower the value,
 // the more aggressive RFP is.
-#define RFP_THRESHOLD (150 * CP_SCALE_FACTOR)
+#define RFP_THRESHOLD (128 * CP_SCALE_FACTOR)
 
 // Aspiration window size(s)
 // The aspiration window is the range of values we search
 // for the best move. If we fail to find the best move in
 // this range, we expand the window.
-#define ASPIRATION_WINDOW (50 * CP_SCALE_FACTOR)
+#define ASPIRATION_WINDOW (43 * CP_SCALE_FACTOR)
 
 // Null-move pruning reduction value
 // This is the amount of depth we reduce the search by
 // when we do a null-move search
-#define NMP_R_VALUE 3
+#define NMP_R_VALUE 4
 
 // Delta pruning threshold
 // This is the threshold for delta pruning (in centipawns)