diff --git a/src/elo.rs b/src/elo.rs
index 0a07d3d..2c1af20 100644
--- a/src/elo.rs
+++ b/src/elo.rs
@@ -46,7 +46,7 @@ pub fn run() {
             }
 
             // different values of top_k_children
-            [1, 2, 3]
+            [1, 2]
                 .map(move |top_k_children| FutureMoveConfig {
                     top_k_children,
                     ..prev_c
@@ -56,12 +56,12 @@ pub fn run() {
         .flat_map(move |prev_c| {
             if !prev_c.do_prune {
                 // do not bother making configs when pruning is disabled
-                // as top_k_children does nothing when pruning is skipped
                 return vec![prev_c];
             }
 
-            // different values of top_k_children
-            [1, 2, 3]
+            // different values to be subtracted from max_depth
+            // to become min_arena_depth
+            [prev_c.max_depth, 1, 3]
                 .into_iter()
                 .filter(|&x| x <= prev_c.max_depth)
                 .map(move |ad_offset| FutureMoveConfig {
@@ -69,6 +69,22 @@ pub fn run() {
                     ..prev_c
                 })
                 .collect()
+        })
+        .flat_map(move |prev_c| {
+            if !prev_c.do_prune {
+                // do not bother making configs when pruning is disabled
+                return vec![prev_c];
+            }
+
+            // different values of up_to_minus
+            [0, 2, 4]
+                .into_iter()
+                .filter(|&x| x <= prev_c.max_depth)
+                .map(move |up_to_minus| FutureMoveConfig {
+                    up_to_minus,
+                    ..prev_c
+                })
+                .collect()
         });
 
     let vec: Vec<(String, Box<dyn Fn(Piece) -> Box<dyn Agent>>)> = configs