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Merged
TheRealGioviok merged 5 commits into from
Dec 26, 2025
Merged

First ever spsa (48 params @STC, 155k games) #342

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a2695fd
Bench: 13074664
TheRealGioviok Dec 25, 2025
636d8ad
STC spsa profile
TheRealGioviok Dec 25, 2025
ab99129
155k stc games
TheRealGioviok Dec 26, 2025
fddc856
Disable tuning
TheRealGioviok Dec 26, 2025
064cc28
Format
TheRealGioviok Dec 26, 2025
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3 changes: 3 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -44,3 +44,6 @@ build*/
*.epd
# Other common folders
books/*

# Spsa output for script usage
spsa_out*.txt
72 changes: 72 additions & 0 deletions scripts/spsa_out_replace.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,72 @@
import re

# Change config as needed
VALUES_FILE = "spsa_out_140k_stc.txt"
HEADER_FILE = "src/tuned.hpp"
OUTPUT_FILE = "src/tuned.hpp"

PREFIX_TO_STRIP = "tune_"

def load_values(path):
values = {}
with open(path, "r") as f:
for line in f:
line = line.strip()
if not line or line.startswith("#"):
continue

name, value = line.split(",", 1)
name = name.strip()
value = value.strip()

if name.startswith(PREFIX_TO_STRIP):
name = name[len(PREFIX_TO_STRIP):]

values[name] = value

return values


def replace_macro_values(text, values):
macro_re = re.compile(
r"""
(?P<macro>TUNE|NO_TUNE) # macro name
\(
(?P<name>\s*[\w\d_]+)\s*, # parameter name
(?P<value>\s*[^,]+)\s*, # value to replace (2nd arg)
""",
re.VERBOSE,
)

def repl(match):
name = match.group("name").strip()
old_value = match.group("value")

if name not in values:
return match.group(0)

new_value = values[name]

return (
f"{match.group('macro')}("
f"{match.group('name')}, "
f"{new_value},"
)

return macro_re.sub(repl, text)


def main():
values = load_values(VALUES_FILE)

with open(HEADER_FILE, "r") as f:
original = f.read()

updated = replace_macro_values(original, values)

with open(OUTPUT_FILE, "w") as f:
f.write(updated)


if __name__ == "__main__":
main()
15 changes: 11 additions & 4 deletions src/search.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -27,12 +27,18 @@ static Value mated_in(i32 ply) {
return -VALUE_MATED + ply;
}

static constexpr i32 stat_bonus(Depth bonus_depth) {
static i32 stat_bonus(Depth bonus_depth) {
return std::min(tuned::stat_bonus_max, tuned::stat_bonus_quad * bonus_depth * bonus_depth
+ tuned::stat_bonus_lin * bonus_depth
- tuned::stat_bonus_sub);
}

static i32 stat_malus(Depth malus_depth) {
return std::min(tuned::stat_malus_max, tuned::stat_malus_quad * malus_depth * malus_depth
+ tuned::stat_malus_lin * malus_depth
- tuned::stat_malus_sub);
}

std::ostream& operator<<(std::ostream& os, const PV& pv) {
for (Move m : pv.m_pv) {
os << m << ' ';
Expand Down Expand Up @@ -765,7 +771,7 @@ Value Worker::search(
ply + 1, !cutnode);
if (quiet && (value <= alpha || value >= beta)) {
m_td.history.update_cont_hist(pos, m, ply, ss,
value <= alpha ? -stat_bonus(new_depth)
value <= alpha ? -stat_malus(new_depth)
: stat_bonus(new_depth));
}
}
Expand Down Expand Up @@ -822,18 +828,19 @@ Value Worker::search(
if (best_value >= beta) {
i32 bonus_depth = depth + (best_value >= beta + 100);
const i32 bonus = stat_bonus(bonus_depth);
const i32 malus = stat_malus(bonus_depth);
if (quiet_move(best_move)) {
ss->killer = best_move;

m_td.history.update_quiet_stats(pos, best_move, ply, ss, bonus);
for (Move quiet : quiets_played) {
m_td.history.update_quiet_stats(pos, quiet, ply, ss, -bonus);
m_td.history.update_quiet_stats(pos, quiet, ply, ss, -malus);
}
} else {
m_td.history.update_noisy_stats(pos, best_move, bonus);
}
for (Move noisy : noisies_played) {
m_td.history.update_noisy_stats(pos, noisy, -bonus);
m_td.history.update_noisy_stats(pos, noisy, -malus);
}
}

Expand Down
104 changes: 55 additions & 49 deletions src/tuned.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -12,92 +12,98 @@ namespace Clockwork::tuned {
#define CLOCKWORK_TUNABLES(TUNE, NO_TUNE) \
\
/* RFP Values */ \
TUNE(rfp_margin, 147, 40, 160, 4, 0.002) \
TUNE(rfp_margin, 144, 40, 160, 4, 0.002) \
NO_TUNE(rfp_depth, 7, 4, 10, .5, 0.002) \
\
/* NMP Values */ \
NO_TUNE(nmp_depth, 3, 1, 10, .5, 0.002) \
NO_TUNE(nmp_base_r, 3, 1, 10, .5, 0.002) \
NO_TUNE(nmp_verif_min_depth, 14, 1, 40, .5, 0.002) \
TUNE(nmp_beta_margin, 30, 10, 60, 3, 0.002) \
TUNE(nmp_beta_diff, 400, 200, 800, 38, 0.002) \
TUNE(nmp_beta_diff, 428, 200, 800, 38, 0.002) \
\
/* ProbCut Values */ \
TUNE(probcut_margin, 300, 100, 500, 10, 0.002) \
TUNE(probcut_see, 100, 0, 200, 10, 0.002) \
TUNE(probcut_margin, 332, 100, 500, 10, 0.002) \
TUNE(probcut_see, 108, 0, 200, 10, 0.002) \
NO_TUNE(probcut_min_depth, 5, 1, 20, 0.5, 0.002) \
\
/* SEE Values */ \
TUNE(quiesce_see_threshold, 0, -1000, 100, 20, 0.002) \
TUNE(movepicker_see_capthist_divisor, 48, 16, 192, 10, 0.002) \
TUNE(quiesce_see_threshold, 18, -1000, 100, 20, 0.002) \
TUNE(movepicker_see_capthist_divisor, 54, 16, 192, 10, 0.002) \
\
/* Stat Bonus */ \
TUNE(stat_bonus_max, 1896, 948, 3792, 142, 0.002) \
TUNE(stat_bonus_max, 1828, 948, 3792, 142, 0.002) \
TUNE(stat_bonus_quad, 4, 2, 8, .5, 0.002) \
TUNE(stat_bonus_lin, 120, 60, 240, 9, 0.002) \
TUNE(stat_bonus_sub, 120, 60, 240, 9, 0.002) \
TUNE(stat_bonus_lin, 118, 60, 240, 9, 0.002) \
TUNE(stat_bonus_sub, 123, 60, 240, 9, 0.002) \
\
/* Stat Malus */ \
TUNE(stat_malus_max, 1627, 948, 3792, 142, 0.002) \
TUNE(stat_malus_quad, 4, 2, 8, .5, 0.002) \
TUNE(stat_malus_lin, 137, 60, 240, 9, 0.002) \
TUNE(stat_malus_sub, 111, 60, 240, 9, 0.002) \
\
/* Search Params */ \
TUNE(asp_window_delta, 50, 25, 100, 4, 0.002) \
TUNE(asp_window_delta, 32, 25, 100, 4, 0.002) \
NO_TUNE(razor_depth, 7, 1, 20, 0.5, 0.002) \
TUNE(razor_margin, 707, 353, 1414, 53, 0.002) \
TUNE(razor_margin, 681, 353, 1414, 53, 0.002) \
NO_TUNE(lmp_depth_mult, 3, 1, 20, 0.5, 0.002) \
\
/* Futility Pruning */ \
TUNE(ffp_margin_base, 500, 250, 1000, 38, 0.002) \
TUNE(ffp_margin_mult, 100, 50, 200, 8, 0.002) \
TUNE(ffp_hist_div, 32, 16, 64, 3, 0.002) \
TUNE(ffp_margin_base, 437, 250, 1000, 38, 0.002) \
TUNE(ffp_margin_mult, 89, 50, 200, 8, 0.002) \
TUNE(ffp_hist_div, 25, 16, 64, 3, 0.002) \
NO_TUNE(ffp_depth, 8, 1, 20, 0.5, 0.002) \
\
/* Quiet History Pruning */ \
NO_TUNE(qhp_depth, 4, 1, 20, 0.5, 0.002) \
TUNE(qhp_threshold, -2048, -4096, -1024, 154, 0.002) \
TUNE(qhp_threshold, -2183, -4096, -1024, 154, 0.002) \
\
/* SEE PVS */ \
TUNE(see_pvs_quiet, -67, -134, -33, 5, 0.002) \
TUNE(see_pvs_noisy_quad, -22, -44, -11, 2, 0.002) \
TUNE(see_pvs_hist_mult, 20, 10, 40, 2, 0.002) \
TUNE(see_pvs_quiet, -65, -134, -33, 5, 0.002) \
TUNE(see_pvs_noisy_quad, -20, -44, -11, 2, 0.002) \
TUNE(see_pvs_hist_mult, 16, 10, 40, 2, 0.002) \
\
/* Singular Extensions */ \
NO_TUNE(sing_min_depth, 6, 1, 20, 0.5, 0.002) \
NO_TUNE(sing_depth_margin, 3, 1, 20, 0.5, 0.002) \
TUNE(sing_beta_margin, 5, 2, 10, 1, 0.002) \
TUNE(dext_margin, 40, 20, 80, 3, 0.002) \
TUNE(dext_hist_div, 512, 256, 1024, 39, 0.002) \
TUNE(triext_margin, 120, 60, 240, 9, 0.002) \
TUNE(triext_hist_div, 512, 256, 1024, 39, 0.002) \
TUNE(dext_hist_div, 491, 256, 1024, 39, 0.002) \
TUNE(triext_margin, 126, 60, 240, 9, 0.002) \
TUNE(triext_hist_div, 573, 256, 1024, 39, 0.002) \
\
/* LMR */ \
TUNE(lmr_quiet_base, 788, 394, 1576, 59, 0.002) \
TUNE(lmr_quiet_div, 208, 104, 416, 16, 0.002) \
TUNE(lmr_noisy_base, 256, 128, 512, 20, 0.002) \
TUNE(lmr_noisy_div, 197, 98, 394, 15, 0.002) \
TUNE(lmr_pv_node_red, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_alpha_raise_red, 512, 256, 1024, 38, 0.002) \
TUNE(lmr_not_improving_red, 512, 256, 1024, 38, 0.002) \
TUNE(lmr_in_check_red, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_cutnode_red, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_no_tt_red, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_ttpv_red, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_tt_capture_red, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_fail_high_red, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_quiet_hist_base, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_hist_div, 8, 4, 16, 2, 0.002) \
TUNE(lmr_fut_red_base, 500, 250, 1000, 38, 0.002) \
TUNE(lmr_fut_red_mult, 100, 50, 200, 8, 0.002) \
TUNE(lmr_fut_red, 1024, 512, 2048, 77, 0.002) \
TUNE(lmr_max_red, 3072, 1536, 6144, 231, 0.002) \
TUNE(lmr_quiet_base, 638, 394, 1576, 59, 0.002) \
TUNE(lmr_quiet_div, 164, 104, 416, 16, 0.002) \
TUNE(lmr_noisy_base, 258, 128, 512, 20, 0.002) \
TUNE(lmr_noisy_div, 193, 98, 394, 15, 0.002) \
TUNE(lmr_pv_node_red, 1207, 512, 2048, 77, 0.002) \
TUNE(lmr_alpha_raise_red, 514, 256, 1024, 38, 0.002) \
TUNE(lmr_not_improving_red, 520, 256, 1024, 38, 0.002) \
TUNE(lmr_in_check_red, 1021, 512, 2048, 77, 0.002) \
TUNE(lmr_cutnode_red, 1087, 512, 2048, 77, 0.002) \
TUNE(lmr_no_tt_red, 997, 512, 2048, 77, 0.002) \
TUNE(lmr_ttpv_red, 1097, 512, 2048, 77, 0.002) \
TUNE(lmr_tt_capture_red, 968, 512, 2048, 77, 0.002) \
TUNE(lmr_fail_high_red, 980, 512, 2048, 77, 0.002) \
TUNE(lmr_quiet_hist_base, 940, 512, 2048, 77, 0.002) \
TUNE(lmr_hist_div, 12, 4, 16, 2, 0.002) \
TUNE(lmr_fut_red_base, 562, 250, 1000, 38, 0.002) \
TUNE(lmr_fut_red_mult, 99, 50, 200, 8, 0.002) \
TUNE(lmr_fut_red, 864, 512, 2048, 77, 0.002) \
TUNE(lmr_max_red, 2985, 1536, 6144, 231, 0.002) \
\
/* TIME MANAGEMENT */ \
TUNE(time_hard_limit, 256, 128, 512, 19, 0.002) \
TUNE(time_soft_limit, 51, 25, 100, 3, 0.002) \
TUNE(time_soft_increment, 512, 256, 1024, 38, 0.002) \
TUNE(nodetm_min_factor, 512, 256, 1024, 38, 0.002) \
TUNE(nodetm_avg_factor, 2048, 1024, 4096, 153, 0.002) \
TUNE(nodetm_frac_factor, 1895, 948, 3792, 142, 0.002) \
TUNE(d1plexity_base, 788, 394, 1576, 59, 0.002) \
TUNE(d1plexity_max_complexity, 200, 100, 400, 15, 0.002) \
TUNE(d1plexity_divisor, 386, 193, 772, 29, 0.002) \
NO_TUNE(time_hard_limit, 256, 128, 512, 19, 0.002) \
NO_TUNE(time_soft_limit, 51, 25, 100, 3, 0.002) \
NO_TUNE(time_soft_increment, 512, 256, 1024, 38, 0.002) \
NO_TUNE(nodetm_min_factor, 512, 256, 1024, 38, 0.002) \
NO_TUNE(nodetm_avg_factor, 2048, 1024, 4096, 153, 0.002) \
NO_TUNE(nodetm_frac_factor, 1895, 948, 3792, 142, 0.002) \
NO_TUNE(d1plexity_base, 788, 394, 1576, 59, 0.002) \
NO_TUNE(d1plexity_max_complexity, 200, 100, 400, 15, 0.002) \
NO_TUNE(d1plexity_divisor, 386, 193, 772, 29, 0.002) \
\
/* End of Tunables */

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