Author: Eelco de Groot
Date: 04:30:16 10/21/05
Go up one level in this thread
On October 21, 2005 at 06:48:30, Kaj Soderberg wrote:
>Trying to tune Pro Deo 1.1, i ran into the possible use of [Pruning = PRUNE BAD
>MOVES_(0-8) where 8 would be default)] as a method to reduce the programs
>pruning, when studying Rebel 12 beta parameters. Could this still used, or is it
>maybe replaced by new parameters in Pro Deo? I remember Ed asking to be careful
>about using older parameters.
>
>Thanks in advance for answers.
>
>Greetings,
>
>Kaj
Helo Kaj,
Here is the complete list of parameters from Ed. But I'm not sure if this is
very readable because of the layout that I changed a bit for saving in Wordpad,
but there are still end of lines that throw things in disarray. I just try it
[Pruning = Prune Bad Moves_0] No reductions allowed slows down search with
a factor of 2.
[Pruning = Prune Bad Moves_1] Allow only 1 reduction slows down search
considerably (30-40%)
[Pruning = Prune Bad Moves_2] Allow only 2 reductions slows down search
(10-15%), effects are little.
[Pruning = Prune Bad Moves_3] Allow only 3 reductions slows down search a
bit, effects are negligible.
are still usable
=============================== ===========
REBEL [MISC] options (01-80) REMARKS
=============================== ===========
[MISC-01] Don't touch Is in use by [Eternal Checks]
[MISC-02] Speedup Small move ordering speedup (1.5%) DEFAULT
SETTING.
[MISC-03] Speedup Small move ordering speedup (4-5%) DEFAULT SETTING.
[MISC-04] ALPHA/BETA Set Window to 0.25 (instead of 0.50) doesn't matter
much.
[MISC-05] ALPHA/BETA Fail-High or Fail-Low in 5 phases doen't
work currently.
[MISC-06] ALPHA/BETA Zero Width (speedup is 3%) looks safe.
[MISC-07] NULLMOVE Detect Zugzwang (new style) untested and doubtful.
[MISC-08] Reduction History Reductions DEFAULT SETTING.
[MISC-09] Reduction Reduce if bad HT score (max=1) (+12%) unclear.
probably no improvement.
[MISC-10] NULLMOVE Block first extension (+10%) untested. no high
expectations.
[MISC-11] Reduction TR70 only on RD-3 probably small improvement.
untested.
[MISC-12] Lazy Eval Double Lazy Eval (safety) DEFAULT
SETTING.
[MISC-13] Bishop Pair Extra bonus (0.25) if opponent no N/B untested.
[MISC-14] Queen Ending New passed pawn handling untested. contains a bug.
[MISC-15] Time Control TR30 (quickly check next iteration) unclear.
[MISC-16] Sel. Search Increase Brute Force if extension (1) (2,0,0,0) see
also MISC-28
[MISC-17] Search Skip first extension (+30-35%) unclear.
[MISC-18] Bishop Pair via no. of pawns instead of material unclear.
[MISC-19] Time Control Play Fast against humans mandatory against GM's.
Do NOT mix with MISC_68 (!)
[MISC-20] Don't touch In use for compatibility reasons with older
versions.
[MISC-21] Lazy Eval Tuning attempt (-4%) about equal.
[MISC-22] Move Ordering Sort root moves on nodes no improvement.
[MISC-23] Reduction PLMAX-b reduction only once could make a
difference.untested.
[MISC-24] Search Skip first recapture extension unclear.
[MISC-25] Reduction PLW3 reduction (new style) DEFAULT SETTING.
[MISC-26] Extension Skip endgame extension untested. no expectations.
[MISC-27] Eval Eval double pawns (new style) untested. interesting.
[MISC-28] Sel. Search Increase Brute Force if extension (2) (2,2,1,1) see
also MISC-16
[MISC-29] Search Limit check extensions (2x SVDSG) looks ok (+4%)
[MISC-30] Extension Allow singular check extensions (max=3) great for
tactics, unclear in practical games
[MISC-31] ALPHA/BETA Fail_high_error = best move unclear and risky.
[MISC-32] Sel. Search Increase Brute Force if extension (3) untested.
Speed loss of 12% in endgame.
[MISC-33] Eval Cancel exchange when up/down algorithm. Unclear.
[MISC-34] ............ ...................................
[MISC-35] ............ ...................................
[MISC-36] Extension Extend double attacks (W6) at the leafs looks
promising (-2%)
[MISC-37] Extension Hash Table extension (-18%) DEFAULT SETTING.
[MISC-38] ............. ....................................
[MISC-39] NULLMOVE Move ordering (+4%) DEFAULT SETTING.
[MISC-40] Sel. Search PLMAX-Z3 reduction (+15%) DEFAULT SETTING.
[MISC-41] ............. ....................................
[MISC-42] REDUCE no reduction if prev plies extended interesting. good
first results. needs more testing.
[MISC-43] Search No TWS extensions in the last x plies untested. better
don't touch.
[MISC-44] ............. ....................................
[MISC-45] ............. ....................................
[MISC-46] ............. ....................................
[MISC-47] Extension King Safety extension (-5%) equal. matter of taste.
[MISC-48] Q-Search No FHR pruning in QS (-6%) unclear.
[MISC-49] ............. ....................................
[MISC-50] Search Maximize reductions iteration driven unclear.
[MISC-51] Time Control Minimum search depth easy-moves untested. could
matter a lot in blitz games.
[MISC-52] Reduction FH reduction (new style) (max=1) DEFAULT SETTING.
[MISC-53] Reduction BBB reduction (new style) (max=1) untested. could
matter.
[MISC-54] ............. ....................................
[MISC-55] ............. ....................................
[MISC-56] NULLMOVE Limit Nulmove Mate Extension (max=1) untested. probably
no big deal.
[MISC-57] Extension Extend withdrawing moves at the leafs looks promising
(-2%)
[MISC-58] Eval Recalculate passed pawns the [M58_Table = midg]
sub-setting looks promising.
[MISC-59] Eval Recalculate Bad Bishop (endgame) untested.
[MISC-60] Eval Recalculate Bishop financhetto untested.
[MISC-61] Eval Rook behind passed pawn tuning Sub-setting [M61_Perc =
100]
[MISC-62] ............. ....................................
[MISC-63] Lazy Eval Include pawns on 7th (2th) rank unclear.
[MISC-64] Search No 7th (2th) rank pawn exte in MIDG untested.
[MISC-65] ............. ....................................
[MISC-66] Hash Table Bugfix DEFAULT SETTING.
[MISC-67] ............. ....................................
[MISC-68] Time Control Play fast against computers promising. Do NOT mix
with MISC_19 (!)
[MISC-69] Eval King tropism opponent passed pawn DEFAULT SETTING.
[MISC-70] ............. ....................................
[MISC-71] ............. ....................................
[MISC-72] Search Research FH error directly unclear.
[MISC-73] ............. ....................................
[MISC-74] Reduction HT singular reduction (2.00) (+11%) unclear.
[MISC-75] Eval King Safety (no pawnram queen endings)untested.
[MISC-76] Endgame Rook 7th rank (new style) untested. note the 2
sub-settings.
[MISC-77] Search Avoid double reductions untested. probably no big
deal.
[MISC-78] NULLMOVE Adaptive nullmove. DEFAULT SETTING.
[MISC-79] EVAL Adjust King Safety (insuf. material) attempt to fix the
KBPK bad bishop bug.
[MISC-80] Draw Bugfix 50-move rule don't touch. probably even worse.
==============================
MISC sub-settings (parameters)
==============================
[MISC-09] Reduction Reduce if bad HT score (max=1) (+12%) (default is
2.00)
[M09_val = 2.00] Margin is 2.00
[MISC-27] Eval Eval double pawns (new style) untested. interesting.
[M27_midg = 100] Double pawn factor middlegame
[M27_end1 = 100] Double pawn factor endgame (normal)
[M27_end2 = 100] Double pawn factor endgame (simple)
[MISC-43] Search No TWS extensions in the last x plies untested.
better don't touch.
[M43_TWS = 3] RD=3
[MISC-52] Reduction FH reduction (new style) (max=1) DEFAULT SETTING.
[Fail High Margin = 9.00] Default is 9.00
[MISC-58] Eval Recalculate passed pawns the [M58_Table = midg]
sub-setting looks promising.
[M58_Table = midg] normal|strong|midg|endg (default is
normal)
[MISC-61] Eval Rook behind passed pawn tuning untested.
[M61_Perc = 100] Default is 100.
[MISC-69] Eval King tropism opponent passed pawn DEFAULT SETTING.
[M69_Perc = 100] Default is 100. Tuning is needed
[MISC-74] Reduction HT singular reduction
(+11%) (default is 2.00)
[M09_val = 2.00] Margin is 2.00
[MISC-76] Endgame Rook 7th rank (new
style)
[Rook 7th Rank (low) = 50] 50 (default)
(when opponent king is on the 8th rank)
[Rook 7th Rank (high) = 50] 50 (default)
(when opponent king can't escape from 8th rank)
================
Other parameters
================
[Your Queen = 100] Increase (decrease) value opponent queen
[My Queen = 101] Own Queen +1% (0.09) DEFAULT SETTING.
[Own Queen = 1.00] Increase own queen when down unclear.
[Queen Endgame Bonus = 0.50] Increase value of Queen in endgame unclear.
[Endgame Mobility = 100] Self explanatory untested.
[Knight Mobility = 100] Self explanatory A lower value is probably
better.
[Minimum Knight Mobility = 100] Self explanatory DEFAULT SETTING. Tuning
is needed nevertheless.
[Minimum Bishop Mobility = 100] Self explanatory DEFAULT SETTING. Tuning
is needed nevertheless.
[Keep Main Line = 10] Minimum margin for each new
mainline Untested.Risky! (speedup 5%)
[Time Control = 125] 125
clear improvement using blitz levels, unclear on all other
levels.
[Time Control Status = ALWAYS] ALWAYS|PB ONLY
[Eternal Checks = Normal] off|normal|risky|safe default=off.
Algorithm to detect eternal checks, its quality is doubtful.
[Recaptures = Normal]
1.00|1.50|2.00|2.50|3.00|4.00|5.00|normal|aggressive
I am afraid none of these will give a clear improvement, but I only
tried [2.00]
[Chaos = 100] Substitute for [Attacking = 100] [Attacking] [Chaos] and
[Confusion] are algorithms to use against humans. It's practical use against
computers is doubtful, their status is untested.
[Confusion = 100] Substitute for [Attacking = 100]
[Lazyeval MIDG = moderate] * normal|moderate|strong probably a small
improvement.
[Lazyeval ENDG = moderate] * normal|moderate|strong probably a small
improvement.
[Checks Depth = 1] limit QS checks to 1 ply
(+9%) probably an improvement.
[Clear Hash Table = Always] Always|Never|PB only probably a small
improvement.
[Pruning = Prune Bad Moves_0] No reductions allowed slows down search with
a factor of 2.
[Pruning = Prune Bad Moves_1] Allow only 1 reduction slows down search
considerably (30-40%)
[Pruning = Prune Bad Moves_2] Allow only 2 reductions slows down search
(10-15%), effects are little.
[Pruning = Prune Bad Moves_3] Allow only 3 reductions slows down search a
bit, effects are negligible.
[Nullmove Margin = 0] Search speedup depending on the height of the
parameter.
Reasonable values in the
range of 0-16. Above that chances are high for big search gaps.
Default setting is 0 (off)
[Transpositions = ON] on|off (for testing purposes only)
[Extensions (remaining)= 3] Maximum recapture extensions (default
is 3) (maximum is 15)
[Extensions (checks)= NORMAL] low|moderate|normal|strong|high|all
Low (+25%)
Moderate ( +8%)
Normal Default setting
Strong (-16%)
High (-21%)
All (-26%)
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