$NetBSD$

--- src/iterate.c.orig	Tue Mar  9 23:14:23 2004
+++ src/iterate.c	Tue Mar  9 23:14:54 2004
@@ -192,6 +192,7 @@
    }
    while (!(flags & TIMEOUT)) 
    {
+      sched_yield();
       if (score > MATE-255)
       {
 	 RootAlpha = score-1;
