From: Gian-Carlo Pascutto <gcp@sjeng.org>
Date: Wed, 18 Oct 2017 08:25:12 +0000 (+0200)
Subject: Don't filter root moves if MultiPV mode is enabled
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=86ac50403d58ce94efc1f2f3ab85ac25abdb6db9

Don't filter root moves if MultiPV mode is enabled

A band-aid patch to workaround current TB code
limitations with multi PV.

Hopefully this will be removed after committing the
big update of TB impementation, now under discussion.

No functional change.
---

diff --git a/src/search.cpp b/src/search.cpp
index f0224d8c..76afd5da 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1588,6 +1588,10 @@ void Tablebases::filter_root_moves(Position& pos, Search::RootMoves& rootMoves)
     ProbeDepth = Options["SyzygyProbeDepth"] * ONE_PLY;
     Cardinality = Options["SyzygyProbeLimit"];
 
+    // Don't filter any moves if the user requested analysis on multiple
+    if (Options["MultiPV"] != 1)
+        return;
+
     // Skip TB probing when no TB found: !TBLargest -> !TB::Cardinality
     if (Cardinality > MaxCardinality)
     {