Further increase SEE prune depth

mcostalba · mcostalba · commit 0586b51f9c39 · 2013-03-16T11:20:03.000+01:00
After 16000 games at 60+0.05
ELO: 2.89 +-5.4 (95%) LOS: 96.5%
Total: 16000 W: 2775 L: 2642 D: 10583

bench: 5442365
diff --git a/src/search.cpp b/src/search.cpp
@@ -885,7 +885,7 @@ namespace {
           }
 
           // Prune moves with negative SEE at low depths
-          if (   predictedDepth < 3 * ONE_PLY
+          if (   predictedDepth < 4 * ONE_PLY
               && pos.see_sign(move) < 0)
           {
               if (SpNode)

Original file line number	Diff line number	Diff line change
`@@ -885,7 +885,7 @@ namespace {`
`885`	`885`	`}`
`886`	`886`
`887`	`887`	`// Prune moves with negative SEE at low depths`
`888`		`- if ( predictedDepth < 3 * ONE_PLY`
	`888`	`+ if ( predictedDepth < 4 * ONE_PLY`
`889`	`889`	`&& pos.see_sign(move) < 0)`
`890`	`890`	`{`
`891`	`891`	`if (SpNode)`