Rook PSQT Tuned

Failed STC (Yellow )
LLR: -2.96 (-2.94,2.94) [0.00,4.00]
Total: 56302 W: 12007 L: 11953 D: 32342
http://tests.stockfishchess.org/tests/view/5be69d210ebc595e0ae3185b

Passed 1st LTC (Green)
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 8745 W: 1480 L: 1301 D: 5964
http://tests.stockfishchess.org/tests/view/5be682960ebc595e0ae31818

Failed 2nd LTC (Red)
LLR: -2.96 (-2.94,2.94) [0.00,4.00]
Total: 19398 W: 3040 L: 3133 D: 13225
http://tests.stockfishchess.org/tests/view/5be69b840ebc595e0ae31856

Passed 3rd LTC (Green)
LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 107516 W: 17342 L: 16858 D: 73316
http://tests.stockfishchess.org/tests/view/5bea879a0ebc595e0ae34d80

Closes https://github.com/official-stockfish/Stockfish/pull/1809

How to continue from there?

The values in the rook table now look a bit strange for a human eye
and are hard to explain, maybe it would be nice to simplify them
by hand and see if we can pass another (clean) double green with a
more regular array.

Bench: 3188070

diff --git a/src/psqt.cpp b/src/psqt.cpp
index c9065cbe37289cad176c4331f18f667ff42a4ba7..363a86016301771dbaf2c382db5f55e6600055ce 100644 (file)
--- a/src/psqt.cpp
+++ b/src/psqt.cpp
@@ -67,14 +67,14 @@ constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
    { S(-47,-55), S( -7,-32), S(-17,-36), S(-29,-17) }
   },
   { // Rook
-   { S(-25, 0), S(-16, 0), S(-10, 5), S( 6, 5) },
-   { S(-21, 0), S( -8, 0), S( -3, 0), S( 0, 0) },
-   { S(-21, 0), S( -9, 0), S( -4, 0), S( 2, 0) },
-   { S(-22, 0), S( -6, 0), S( -1, 0), S( 2, 0) },
-   { S(-22, 0), S( -7, 0), S(  0, 0), S( 1, 0) },
-   { S(-21, 0), S( -7, 0), S(  0, 0), S( 2, 0) },
-   { S(-12, 0), S(  4, 0), S(  8, 0), S(12, 0) },
-   { S(-23, 0), S(-15, 0), S(-11, 0), S(-5, 0) }
+   { S(-24, 0), S(-15, 3), S( -8, 0), S( 0, 3) },
+   { S(-18,-7), S( -5,-5), S( -1,-5), S( 1,-1) },
+   { S(-19, 6), S(-10,-7), S(  1, 3), S( 0, 3) },
+   { S(-21, 0), S( -7, 4), S( -4,-2), S(-4, 1) },
+   { S(-21,-7), S(-12, 5), S( -1,-5), S( 4,-7) },
+   { S(-23, 3), S(-10, 2), S(  1,-1), S( 6, 3) },
+   { S(-11,-1), S(  8, 7), S(  9,11), S(12,-1) },
+   { S(-25, 6), S(-18, 4), S(-11, 6), S( 2, 2) }
   },
   { // Queen
    { S( 0,-71), S(-4,-56), S(-3,-42), S(-1,-29) },