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Remove failHigh/Low bits from IterationInfoType

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We don't use that info anyway.

Also document a little more new aspiration window code.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-04-16 10:02:01 +02:00
parent 7af1b40b4e
commit e30720b0bf
1 changed files with 9 additions and 6 deletions
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15
src/search.cpp
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@ -60,11 +60,10 @@ namespace {
struct IterationInfoType { struct IterationInfoType {
IterationInfoType(Value v = Value(0), Value sv = Value(0), bool fh = false, bool fl = false) IterationInfoType(Value v = Value(0), Value sv = Value(0))
: value(v), speculatedValue(sv), failHigh(fh), failLow(fl) {} : value(v), speculatedValue(sv) {}
Value value, speculatedValue; Value value, speculatedValue;
bool failHigh, failLow;
}; };
@ -736,6 +735,7 @@ namespace {
} }
else if (value <= alpha) else if (value <= alpha)
{ {
assert(value == alpha);
assert(delta < 0); assert(delta < 0);
fLow = true; fLow = true;
@ -745,7 +745,7 @@ namespace {
speculatedValue = value; speculatedValue = value;
speculatedValue = Min(Max(speculatedValue, -VALUE_INFINITE), VALUE_INFINITE); speculatedValue = Min(Max(speculatedValue, -VALUE_INFINITE), VALUE_INFINITE);
IterationInfo[Iteration] = IterationInfoType(value, speculatedValue, fHigh, fLow); IterationInfo[Iteration] = IterationInfoType(value, speculatedValue);
// Erase the easy move if it differs from the new best move // Erase the easy move if it differs from the new best move
if (ss[0].pv[0] != EasyMove) if (ss[0].pv[0] != EasyMove)
@ -867,8 +867,11 @@ namespace {
{ {
if (alpha >= beta) if (alpha >= beta)
{ {
// We failed high, invalidate and skip next moves, leave node-counters
// and beta-counters as they are and quickly return, we will try to do
// a research at the next iteration with a bigger aspiration window.
rml.set_move_score(i, -VALUE_INFINITE); rml.set_move_score(i, -VALUE_INFINITE);
continue; // Leave node-counters and beta-counters as they are continue;
} }
int64_t nodes; int64_t nodes;
Move move; Move move;
@ -951,7 +954,7 @@ namespace {
rml.set_move_score(i, -VALUE_INFINITE); rml.set_move_score(i, -VALUE_INFINITE);
else else
{ {
// New best move! // PV move or new best move!
// Update PV // Update PV
rml.set_move_score(i, value); rml.set_move_score(i, value);