From 5ddc45c790b4ae13bb3bea89c3e6a40f18a38ab1 Mon Sep 17 00:00:00 2001
From: Jay Honnold <jhonnold@users.noreply.github.com>
Date: Sun, 25 Sep 2022 16:11:13 -0700
Subject: [PATCH] 16 King Buckets (#410)

Bench: 4668255

Increase the number of input features to utilize 16 buckets (up from 8).

STC

ELO   | 5.25 +- 4.27 (95%)
CONF  | 10.0+0.10s Threads=1 Hash=8MB
GAMES | N: 12304 W: 3082 L: 2896 D: 6326

LTC

ELO   | 5.73 +- 3.98 (95%)
SPRT  | 60.0+0.60s Threads=1 Hash=64MB
LLR   | 2.95 (-2.94, 2.94) [0.00, 4.00]
GAMES | N: 13344 W: 3162 L: 2942 D: 7240
---
 src/board.c  | 16 ++++++++--------
 src/makefile |  4 ++--
 src/networks |  2 +-
 src/types.h  |  4 ++--
 4 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/src/board.c b/src/board.c
index 30ae3c6e..f67fde14 100644
--- a/src/board.c
+++ b/src/board.c
@@ -32,14 +32,14 @@
 #include "uci.h"
 #include "zobrist.h"
 
-const uint16_t KING_BUCKETS[64] = {7, 7, 7, 7, 7, 7, 7, 7, //
-                                   7, 7, 7, 7, 7, 7, 7, 7, //
-                                   6, 6, 6, 6, 6, 6, 6, 6, //
-                                   6, 6, 6, 6, 6, 6, 6, 6, //
-                                   5, 5, 4, 4, 4, 4, 5, 5, //
-                                   5, 5, 4, 4, 4, 4, 5, 5, //
-                                   3, 2, 1, 0, 0, 1, 2, 3, //
-                                   3, 2, 1, 0, 0, 1, 2, 3};
+const uint16_t KING_BUCKETS[64] = {15, 15, 14, 14, 14, 14, 15, 15, //
+                                   15, 15, 14, 14, 14, 14, 15, 15, //
+                                   13, 13, 12, 12, 12, 12, 13, 13, //
+                                   13, 13, 12, 12, 12, 12, 13, 13, //
+                                   11, 10, 9,  8,  8,  9,  10, 11, //
+                                   11, 10, 9,  8,  8,  9,  10, 11, //
+                                   7,  6,  5,  4,  4,  5,  6,  7,  //
+                                   3,  2,  1,  0,  0,  1,  2,  3};
 
 // piece count key bit mask idx
 const uint64_t PIECE_COUNT_IDX[] =
diff --git a/src/makefile b/src/makefile
index 21b61641..2f0a93ad 100644
--- a/src/makefile
+++ b/src/makefile
@@ -4,8 +4,8 @@
 EXE      = berserk
 SRC      = *.c pyrrhic/tbprobe.c
 CC       = gcc
-VERSION  = 20220925
-MAIN_NETWORK = networks/berserk-d981c77e4fa7.nn
+VERSION  = 202209251606
+MAIN_NETWORK = networks/berserk-c982d9682d4e.nn
 EVALFILE = $(MAIN_NETWORK)
 DEFS     = -DVERSION=\"$(VERSION)\" -DEVALFILE=\"$(EVALFILE)\" -DNDEBUG
 
diff --git a/src/networks b/src/networks
index 353e81dc..b2322fe1 160000
--- a/src/networks
+++ b/src/networks
@@ -1 +1 @@
-Subproject commit 353e81dcd1d1bf06a96cc8da9d307805a21f2fbd
+Subproject commit b2322fe1e927c1699efaa75f1f280d7db6f7573f
diff --git a/src/types.h b/src/types.h
index 8ad92917..2ce7527e 100644
--- a/src/types.h
+++ b/src/types.h
@@ -24,9 +24,9 @@
 #define MAX_SEARCH_PLY (INT8_MAX + 1)
 #define MAX_MOVES      128
 
-#define N_KING_BUCKETS 8
+#define N_KING_BUCKETS 16
 
-#define N_FEATURES (8 * 12 * 64)
+#define N_FEATURES (N_KING_BUCKETS * 12 * 64)
 #define N_HIDDEN   512
 #define N_OUTPUT   1