Merge branch 'h48-corner-estimate'

1 files changed, 7 insertions, 2 deletions

diff --git a/src/solvers/h48/solve.h b/src/solvers/h48/solve.h
index 2920fa7..4aa3799 100644
--- a/src/solvers/h48/solve.h
+++ b/src/solvers/h48/solve.h
@@ -115,10 +115,15 @@ solve_h48_stop(dfsarg_solve_h48_t arg[static 1])
         arg->movemask_normal = arg->movemask_inverse = MM18_ALLMOVES;
         arg->nodes_visited++;
 
-        /* Preliminary probing using last computed bound, if possible */
-
         n = arg->solution_moves->nmoves + arg->solution_moves->npremoves;
         target = arg->target_depth - n;
+
+        /* We'll never get a bound higher than base + 3 */
+        if (arg->base + 3 <= target)
+                return false;
+
+        /* Preliminary probing using last computed bound, if possible */
+
         if ((arg->use_lb_normal && arg->lb_normal > target) ||
             (arg->use_lb_inverse && arg->lb_inverse > target))
                 return true;