From e49eb67119f772ef6fcecb736cf136b851ee72cc Mon Sep 17 00:00:00 2001 From: Marco Costalba Date: Sat, 24 May 2014 04:31:36 +0200 Subject: [PATCH] Add perft 'divide' command To show perft numbers for each move. Just use 'divide' instead of 'perft', for instance: position startpos moves e2e4 e7e5 divide 4 Inspired by Ronald de Man. No functional change. --- src/benchmark.cpp | 13 ++++++++++++- src/uci.cpp | 6 ++++-- 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/src/benchmark.cpp b/src/benchmark.cpp index 08768cde..2f943c4e 100644 --- a/src/benchmark.cpp +++ b/src/benchmark.cpp @@ -23,6 +23,7 @@ #include #include "misc.h" +#include "notation.h" #include "position.h" #include "search.h" #include "thread.h" @@ -136,7 +137,17 @@ void benchmark(const Position& current, istream& is) { cerr << "\nPosition: " << i + 1 << '/' << fens.size() << endl; - if (limitType == "perft") + if (limitType == "divide") + for (MoveList it(pos); *it; ++it) + { + StateInfo si; + pos.do_move(*it, si); + uint64_t cnt = limits.depth > 1 ? Search::perft(pos, (limits.depth - 1) * ONE_PLY) : 1; + pos.undo_move(*it); + cerr << move_to_uci(*it, pos.is_chess960()) << ": " << cnt << endl; + nodes += cnt; + } + else if (limitType == "perft") { uint64_t cnt = Search::perft(pos, limits.depth * ONE_PLY); cerr << "\nPerft " << limits.depth << " leaf nodes: " << cnt << endl; diff --git a/src/uci.cpp b/src/uci.cpp index 9574ff96..f4d71962 100644 --- a/src/uci.cpp +++ b/src/uci.cpp @@ -174,12 +174,14 @@ void UCI::loop(int argc, char* argv[]) { else Search::Limits.ponder = false; } - else if (token == "perft" && (is >> token)) // Read perft depth + else if (token == "perft" || token == "divide") { + int depth; stringstream ss; + is >> depth; ss << Options["Hash"] << " " - << Options["Threads"] << " " << token << " current perft"; + << Options["Threads"] << " " << depth << " current " << token; benchmark(pos, ss); } -- 2.39.2