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Rename ei.kingDanger in ei.margin

Browse source 
It will be more clear when we will go to add stuff
apart from king danger itself.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-08-20 09:47:07 +02:00
parent 00469d1798
commit c7a932bc74
4 changed files with 19 additions and 19 deletions
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6
src/evaluate.cpp
View file

@ -709,14 +709,14 @@ namespace {
attackUnits = Min(99, Max(0, attackUnits)); attackUnits = Min(99, Max(0, attackUnits));
// Finally, extract the king danger score from the KingDangerTable[] // Finally, extract the king danger score from the KingDangerTable[]
// array and subtract the score from evaluation. Set also ei.kingDanger[] // array and subtract the score from evaluation. Set also ei.margin[]
// value that will be used for pruning because this value can sometimes // value that will be used for pruning because this value can sometimes
// be very big, and so capturing a single attacking piece can therefore // be very big, and so capturing a single attacking piece can therefore
// result in a score change far bigger than the value of the captured piece. // result in a score change far bigger than the value of the captured piece.
ei.value -= Sign[Us] * KingDangerTable[Us][attackUnits]; ei.value -= Sign[Us] * KingDangerTable[Us][attackUnits];
ei.kingDanger[Us] = mg_value(KingDangerTable[Us][attackUnits]); ei.margin[Us] = mg_value(KingDangerTable[Us][attackUnits]);
} else } else
ei.kingDanger[Us] = VALUE_ZERO; ei.margin[Us] = VALUE_ZERO;
} }

6
src/evaluate.h
View file

@ -47,7 +47,7 @@ class Position;
struct EvalInfo { struct EvalInfo {
EvalInfo() { kingDanger[0] = kingDanger[1] = VALUE_ZERO; } EvalInfo() { margin[WHITE] = margin[BLACK] = VALUE_ZERO; }
// Middle game and endgame evaluations // Middle game and endgame evaluations
Score value; Score value;
@ -89,8 +89,8 @@ struct EvalInfo {
// 2 to kingAdjacentZoneAttacksCount[BLACK]. // 2 to kingAdjacentZoneAttacksCount[BLACK].
int kingAdjacentZoneAttacksCount[2]; int kingAdjacentZoneAttacksCount[2];
// Value of the danger for the king of the given color // Value of the score margin we should consider for the given color
Value kingDanger[2]; Value margin[2];
}; };

18
src/search.cpp
View file

@ -1035,7 +1035,7 @@ namespace {
if (!PvNode && tte && ok_to_use_TT(tte, depth, beta, ply)) if (!PvNode && tte && ok_to_use_TT(tte, depth, beta, ply))
{ {
// Refresh tte entry to avoid aging // Refresh tte entry to avoid aging
TT.store(posKey, tte->value(), tte->type(), tte->depth(), ttMove, tte->static_value(), tte->king_danger()); TT.store(posKey, tte->value(), tte->type(), tte->depth(), ttMove, tte->static_value(), tte->static_value_margin());
ss->bestMove = ttMove; // Can be MOVE_NONE ss->bestMove = ttMove; // Can be MOVE_NONE
return value_from_tt(tte->value(), ply); return value_from_tt(tte->value(), ply);
@ -1051,13 +1051,13 @@ namespace {
assert(tte->static_value() != VALUE_NONE); assert(tte->static_value() != VALUE_NONE);
ss->eval = tte->static_value(); ss->eval = tte->static_value();
ei.kingDanger[pos.side_to_move()] = tte->king_danger(); ei.margin[pos.side_to_move()] = tte->static_value_margin();
refinedValue = refine_eval(tte, ss->eval, ply); refinedValue = refine_eval(tte, ss->eval, ply);
} }
else else
{ {
refinedValue = ss->eval = evaluate(pos, ei); refinedValue = ss->eval = evaluate(pos, ei);
TT.store(posKey, VALUE_NONE, VALUE_TYPE_NONE, DEPTH_NONE, MOVE_NONE, ss->eval, ei.kingDanger[pos.side_to_move()]); TT.store(posKey, VALUE_NONE, VALUE_TYPE_NONE, DEPTH_NONE, MOVE_NONE, ss->eval, ei.margin[pos.side_to_move()]);
} }
// Save gain for the parent non-capture move // Save gain for the parent non-capture move
@ -1371,7 +1371,7 @@ namespace {
ValueType vt = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT); ValueType vt = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT);
move = (bestValue <= oldAlpha ? MOVE_NONE : ss->bestMove); move = (bestValue <= oldAlpha ? MOVE_NONE : ss->bestMove);
TT.store(posKey, value_to_tt(bestValue, ply), vt, depth, move, ss->eval, ei.kingDanger[pos.side_to_move()]); TT.store(posKey, value_to_tt(bestValue, ply), vt, depth, move, ss->eval, ei.margin[pos.side_to_move()]);
// Update killers and history only for non capture moves that fails high // Update killers and history only for non capture moves that fails high
if ( bestValue >= beta if ( bestValue >= beta
@ -1442,7 +1442,7 @@ namespace {
{ {
assert(tte->static_value() != VALUE_NONE); assert(tte->static_value() != VALUE_NONE);
ei.kingDanger[pos.side_to_move()] = tte->king_danger(); ei.margin[pos.side_to_move()] = tte->static_value_margin();
bestValue = tte->static_value(); bestValue = tte->static_value();
} }
else else
@ -1455,7 +1455,7 @@ namespace {
if (bestValue >= beta) if (bestValue >= beta)
{ {
if (!tte) if (!tte)
TT.store(pos.get_key(), value_to_tt(bestValue, ply), VALUE_TYPE_LOWER, DEPTH_NONE, MOVE_NONE, ss->eval, ei.kingDanger[pos.side_to_move()]); TT.store(pos.get_key(), value_to_tt(bestValue, ply), VALUE_TYPE_LOWER, DEPTH_NONE, MOVE_NONE, ss->eval, ei.margin[pos.side_to_move()]);
return bestValue; return bestValue;
} }
@ -1467,7 +1467,7 @@ namespace {
deepChecks = (depth == -ONE_PLY && bestValue >= beta - PawnValueMidgame / 8); deepChecks = (depth == -ONE_PLY && bestValue >= beta - PawnValueMidgame / 8);
// Futility pruning parameters, not needed when in check // Futility pruning parameters, not needed when in check
futilityBase = bestValue + FutilityMarginQS + ei.kingDanger[pos.side_to_move()]; futilityBase = bestValue + FutilityMarginQS + ei.margin[pos.side_to_move()];
enoughMaterial = pos.non_pawn_material(pos.side_to_move()) > RookValueMidgame; enoughMaterial = pos.non_pawn_material(pos.side_to_move()) > RookValueMidgame;
} }
@ -1552,7 +1552,7 @@ namespace {
// Update transposition table // Update transposition table
Depth d = (depth == DEPTH_ZERO ? DEPTH_ZERO : DEPTH_ZERO - ONE_PLY); Depth d = (depth == DEPTH_ZERO ? DEPTH_ZERO : DEPTH_ZERO - ONE_PLY);
ValueType vt = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT); ValueType vt = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT);
TT.store(pos.get_key(), value_to_tt(bestValue, ply), vt, d, ss->bestMove, ss->eval, ei.kingDanger[pos.side_to_move()]); TT.store(pos.get_key(), value_to_tt(bestValue, ply), vt, d, ss->bestMove, ss->eval, ei.margin[pos.side_to_move()]);
// Update killers only for checking moves that fails high // Update killers only for checking moves that fails high
if ( bestValue >= beta if ( bestValue >= beta
@ -2251,7 +2251,7 @@ namespace {
if (!tte || tte->move() != pv[i]) if (!tte || tte->move() != pv[i])
{ {
v = (p.is_check() ? VALUE_NONE : evaluate(p, ei)); v = (p.is_check() ? VALUE_NONE : evaluate(p, ei));
TT.store(p.get_key(), VALUE_NONE, VALUE_TYPE_NONE, DEPTH_NONE, pv[i], v, ei.kingDanger[pos.side_to_move()]); TT.store(p.get_key(), VALUE_NONE, VALUE_TYPE_NONE, DEPTH_NONE, pv[i], v, ei.margin[pos.side_to_move()]);
} }
p.do_move(pv[i], st); p.do_move(pv[i], st);
} }

8
src/tt.h
View file

@ -43,7 +43,7 @@
/// bit 64-79: value /// bit 64-79: value
/// bit 80-95: depth /// bit 80-95: depth
/// bit 96-111: static value /// bit 96-111: static value
/// bit 112-127: king danger value /// bit 112-127: margin of static value
/// ///
/// the 32 bits of the data field are so defined /// the 32 bits of the data field are so defined
/// ///
@ -62,7 +62,7 @@ public:
value16 = int16_t(v); value16 = int16_t(v);
depth16 = int16_t(d); depth16 = int16_t(d);
staticValue = int16_t(statV); staticValue = int16_t(statV);
kingDanger = int16_t(kd); staticValueMargin = int16_t(kd);
} }
uint32_t key() const { return key32; } uint32_t key() const { return key32; }
@ -72,7 +72,7 @@ public:
ValueType type() const { return ValueType((data >> 21) & 3); } ValueType type() const { return ValueType((data >> 21) & 3); }
int generation() const { return data >> 23; } int generation() const { return data >> 23; }
Value static_value() const { return Value(staticValue); } Value static_value() const { return Value(staticValue); }
Value king_danger() const { return Value(kingDanger); } Value static_value_margin() const { return Value(staticValueMargin); }
private: private:
uint32_t key32; uint32_t key32;
@ -80,7 +80,7 @@ private:
int16_t value16; int16_t value16;
int16_t depth16; int16_t depth16;
int16_t staticValue; int16_t staticValue;
int16_t kingDanger; int16_t staticValueMargin;
}; };