Skip to content

Improve multiPV mode. #2163

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
joergoster wants to merge 1 commit into from
Closed

Improve multiPV mode. #2163

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 7 additions & 1 deletion src/search.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -296,7 +296,7 @@ void Thread::search() {
bestValue = delta = alpha = -VALUE_INFINITE;
beta = VALUE_INFINITE;

size_t multiPV = Options["MultiPV"];
multiPV = Options["MultiPV"];
Skill skill(Options["Skill Level"]);

// When playing with strength handicap enable MultiPV search that we will
Expand Down Expand Up @@ -875,6 +875,12 @@ namespace {
sync_cout << "info depth " << depth / ONE_PLY
<< " currmove " << UCI::move(move, pos.is_chess960())
<< " currmovenumber " << moveCount + thisThread->pvIdx << sync_endl;

// In MultiPV mode also skip moves which will be searched later as PV moves
if (rootNode && std::count(thisThread->rootMoves.begin() + thisThread->pvIdx + 1,
thisThread->rootMoves.begin() + thisThread->multiPV, move))
continue;

if (PvNode)
(ss+1)->pv = nullptr;

Expand Down
2 changes: 1 addition & 1 deletion src/thread.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ class Thread {

Pawns::Table pawnsTable;
Material::Table materialTable;
size_t pvIdx, pvLast;
size_t pvIdx, multiPV, pvLast;
int selDepth, nmpMinPly;
Color nmpColor;
std::atomic<uint64_t> nodes, tbHits, bestMoveChanges;
Expand Down