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Less king danger if we have a knight near by to defend it. (#1987) #1008

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Feb 4, 2019
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Less king danger if we have a knight near by to defend it. (#1987) #1008

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3 changes: 2 additions & 1 deletion src/evaluate.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -482,12 +482,13 @@ namespace {
kingDanger += kingAttackersCount[Them] * kingAttackersWeight[Them]
+ 69 * kingAttacksCount[Them]
+ 185 * popcount(kingRing[Us] & weak)
- 100 * bool(attackedBy[Us][KNIGHT] & attackedBy[Us][KING])
+ 150 * popcount(pos.blockers_for_king(Us) | unsafeChecks)
+ 5 * tropism * tropism / 16
- 873 * !pos.count<QUEEN>(Them)
- 6 * mg_value(score) / 8
+ mg_value(mobility[Them] - mobility[Us])
- 30;
- 25;

// Transform the kingDanger units into a Score, and subtract it from the evaluation
if (kingDanger > 0)
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