diff --git a/Solver/Crafty/SolverConcurrent.cs b/Solver/Crafty/SolverConcurrent.cs
index a258d9c..e49e74a 100644
--- a/Solver/Crafty/SolverConcurrent.cs
+++ b/Solver/Crafty/SolverConcurrent.cs
@@ -21,7 +21,7 @@ public sealed class SolverConcurrent : ISolver
 
     [Pure]
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public static Node? EvalBestChild(ref SolverConfig config, int parentVisits, ref Node.ChildBuffer children) =>
+    public static Node? EvalBestChild(ref SolverConfig config, int parentVisits, ref ArenaBuffer<Node> children) =>
         parentVisits == 0 ?
             null :
             SolverUtils.EvalBestChild<SolverConcurrent>(ref config, parentVisits, ref children);
diff --git a/Solver/Crafty/SolverSingle.cs b/Solver/Crafty/SolverSingle.cs
index a22fa56..38f3c37 100644
--- a/Solver/Crafty/SolverSingle.cs
+++ b/Solver/Crafty/SolverSingle.cs
@@ -21,7 +21,7 @@ public sealed class SolverSingle : ISolver
 
     [Pure]
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public static Node EvalBestChild(ref SolverConfig config, int parentVisits, ref Node.ChildBuffer children) =>
+    public static Node EvalBestChild(ref SolverConfig config, int parentVisits, ref ArenaBuffer<Node> children) =>
         SolverUtils.EvalBestChild<SolverSingle>(ref config, parentVisits, ref children);
 
     [Pure]
diff --git a/Solver/Crafty/SolverUtils.cs b/Solver/Crafty/SolverUtils.cs
index a08d525..526f559 100644
--- a/Solver/Crafty/SolverUtils.cs
+++ b/Solver/Crafty/SolverUtils.cs
@@ -39,7 +39,7 @@ public static class SolverUtils
 
     [Pure]
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public static Node ChildMaxScore(ref Node.ChildBuffer children)
+    public static Node ChildMaxScore(ref ArenaBuffer<Node> children)
     {
         var length = children.Count;
         var vecLength = Vector<float>.Count;
@@ -87,7 +87,7 @@ public static class SolverUtils
 
     [Pure]
     [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
-    public static Node EvalBestChild<S>(ref SolverConfig config, int parentVisits, ref Node.ChildBuffer children) where S : ISolver
+    public static Node EvalBestChild<S>(ref SolverConfig config, int parentVisits, ref ArenaBuffer<Node> children) where S : ISolver
     {
         var length = children.Count;
         var vecLength = Vector<float>.Count;