ChildrenEvalMethod: add and switch to AverageDivDepth

src/logic/future_moves.rs

@@ -78,6 +78,7 @@ impl std::fmt::Display for FutureMoveConfig {
 pub enum ChildrenEvalMethod {
     /// Best (by far) strat compared to Max or Min
     Average,
+    AverageDivDepth,
 }
 
 impl FutureMoves {
@@ -271,7 +272,7 @@ impl FutureMoves {
         let by_depth_vec = self.by_depth(indexes);
 
         // reversed so we build up the value of the closest (in time) moves from the future
-        for (_, nodes) in by_depth_vec.into_iter().rev() {
+        for (depth, nodes) in by_depth_vec.into_iter().rev() {
             for idx in nodes {
                 let children_values = self.arena[idx]
                     .children
@@ -284,6 +285,12 @@ impl FutureMoves {
                         .into_iter()
                         .sum::<i32>()
                         .checked_div(self.arena[idx].children.len() as i32),
+
+                    ChildrenEvalMethod::AverageDivDepth => children_values
+                        .into_iter()
+                        .sum::<i32>()
+                        .checked_div(self.arena[idx].children.len() as i32)
+                        .and_then(|x| x.checked_div(depth as i32)),
                 }
                 .unwrap_or(0);
 
@@ -560,7 +567,7 @@ mod tests {
         max_arena_size: 100,
         do_prune: false,
         print: false,
-        children_eval_method: ChildrenEvalMethod::Average,
+        children_eval_method: ChildrenEvalMethod::AverageDivDepth,
     };
 
     #[test]