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Fix node type detection #55

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Merged
Aryan1508 merged 1 commit into from
Jun 23, 2021
Merged

Fix node type detection #55

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11 changes: 6 additions & 5 deletions Bit-Genie/src/search.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -114,11 +114,12 @@ namespace
}

SearchResult pvs(Position &position, Search &search, TTable &tt,
int depth, int alpha = MinEval, int beta = MaxEval, bool pv_node = false, bool do_null = true)
int depth, int alpha = MinEval, int beta = MaxEval, bool do_null = true)
{
if (search.limits.stopped)
return 0;

bool pv_node = std::abs(alpha - beta) > 1;

if ((search.info.nodes & 2047) == 0)
search.limits.update();
Expand Down Expand Up @@ -152,7 +153,7 @@ namespace
if (!pv_node && !in_check && depth > 4 && search.info.ply && do_null && position.should_do_null())
{
position.apply_null_move(search.info.ply);
int score = -pvs(position, search, tt, depth - 4, -beta, -beta + 1, false, false).score;
int score = -pvs(position, search, tt, depth - 4, -beta, -beta + 1, false).score;
position.revert_null_move(search.info.ply);

if (search.limits.stopped)
Expand Down Expand Up @@ -197,15 +198,15 @@ namespace

int RDepth = std::clamp(new_depth - R, 1, new_depth - 1);

score = -pvs(position, search, tt, RDepth, -alpha - 1, -alpha, false, false).score;
score = -pvs(position, search, tt, RDepth, -alpha - 1, -alpha).score;

if (score > alpha)
score = -pvs(position, search, tt, depth - 1, -beta, -alpha, false).score;
score = -pvs(position, search, tt, depth - 1, -beta, -alpha).score;
}
else
{
if (move_num == 1)
score = -pvs(position, search, tt, depth - 1, -beta, -alpha, true).score;
score = -pvs(position, search, tt, depth - 1, -beta, -alpha).score;
else
{
score = -pvs(position, search, tt, depth - 1, -alpha - 1, -alpha).score;
Expand Down
2 changes: 1 addition & 1 deletion Bit-Genie/src/uci.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@
#include "benchmark.h"
#include "searchinit.h"

const char *version = "6";
const char *version = "6.1";

namespace
{
Expand Down