Update WDL Model for Berserk 13

Bench: 3040242

Non-functional change

src/makefile

@@ -3,7 +3,7 @@ EXE      = berserk
 SRC      = attacks.c bench.c berserk.c bits.c board.c eval.c history.c move.c movegen.c movepick.c perft.c random.c \
 		   search.c see.c tb.c thread.c transposition.c uci.c util.c zobrist.c nn/accumulator.c nn/evaluate.c pyrrhic/tbprobe.c
 CC       = clang
-VERSION  = 20240329
+VERSION  = 13
 MAIN_NETWORK = berserk-d43206fe90e4.nn
 EVALFILE = $(MAIN_NETWORK)
 DEFS     = -DVERSION=\"$(VERSION)\" -DEVALFILE=\"$(EVALFILE)\" -DNDEBUG

src/uci.c

@@ -54,8 +54,8 @@ SearchParams Limits;
 // this repo: https://github.com/vondele/WLD_model
 
 // Third order polynomial fit of Berserk data
-const double as[4] = {-5.83465749, 46.43599644, -58.49798392, 172.62328616};
-const double bs[4] = {-7.95320845, 48.50833438, -66.34647240, 56.29169197};
+const double as[4] = {-2.02923586, 16.87641200, -27.06230207, 182.53858835};
+const double bs[4] = {-6.15230497, 42.37548361, -80.19006222, 77.75994970};
 
 // win% as permilli given score and ply
 int WRModel(Score s, int ply) {

src/uci.h

@@ -25,7 +25,7 @@ extern int CONTEMPT;
 extern SearchParams Limits;
 
 // Normalization of a score to 50% WR at 100cp
-#define Normalize(s) ((s) / 1.54)
+#define Normalize(s) ((s) / 1.70)
 
 int WRModel(Score s, int ply);