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Igel 1.8.3
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@vshcherbyna vshcherbyna released this 28 Jul 12:53
· 101 commits to master since this release
1.8.3
6b44957
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Learn about vigilant mode.

What's new:

  • Drop into qsearch at depth <= 0 without checking for tt
  • Avoid null move prunning if a tt hit has been discovered
  • Fix the detection of a root position
  • SEE margin improvements

Strength improvements over older versions:

tc=all/10+0.1
Score of Igel 1.8.3 64 POPCNT vs Igel 1.8.2 64 POPCNT: 3145 - 1879 - 3220  [0.577] 8244
Elo difference: 53.78 +/- 5.87

Rank Name                          Elo     +/-   Games   Score   Draws
   0 Igel 1.8.3 64 POPCNT          124       6   11000   67.1%   26.1%
   1 Igel 1.8.2 64 POPCNT          -43      17    1000   43.9%   38.1%
   2 Igel 1.5.0 64 POPCNT          -61      18    1000   41.3%   33.5%
   3 Igel 1.8.0 64 POPCNT          -63      17    1000   41.1%   35.4%
   4 Igel 1.7.0 64 POPCNT          -92      18    1000   37.0%   34.9%
   5 Igel 1.4.2 64 POPCNT         -121      19    1000   33.2%   25.0%
   6 Igel 1.5.1 64 POPCNT         -135      18    1000   31.4%   31.7%
   7 Igel 1.6.0 64 POPCNT         -139      19    1000   31.0%   30.8%
   8 Igel 1.4.1 64 POPCNT         -148      21    1000   29.8%   13.9%
   9 Igel 1.4 64 POPCNT           -161      21    1000   28.3%   15.8%
  10 Igel 1.2 64 POPCNT           -213      23    1000   22.7%   13.4%
  11 Igel 1.3 64 POPCNT           -217      23    1000   22.3%   14.3%

tc=40/96
Score of Igel 1.8.3 64 POPCNT vs Igel 1.8.2 64 POPCNT: 170 - 103 - 320 [0.556] 593
Elo difference: 39.42 +/- 18.94

Relative strength compared to Cheng 4.39 in CCRL 40/4 time control:

Score of Igel 1.8.3 64 POPCNT vs Cheng 4.39: 148 - 533 - 319  [0.307] 1000
Elo difference: -141.03 +/- 18.45

Relative strength compared to top 50 engines in 10+0.1 time control:

Rank Name                          Elo     +/-   Games   Score   Draws
   0 Igel 1.8.3 64 POPCNT         -399      10   10000    9.1%   10.1%
   1 Stockfish 10 64 POPCNT        798      50    2500   99.0%    1.9%
   2 Ethereal 11.50 (POPCNT)       571      27    2500   96.4%    6.6%
   3 RubiChess 1.5                 394      19    2500   90.6%   11.5%
   4 Cheng 4.39                    214      14    2500   77.4%   20.4%

Relative strength compared to div5 engine in 10+0.1 time control:

Rank Name                          Elo     +/-   Games   Score   Draws
   0 Igel 1.8.3 64 POPCNT          -35       6    9000   44.9%   23.7%
   1 zurichess neuchatel           192      21    1000   75.1%   23.6%
   2 gogobello 2.0                 101      19    1000   64.1%   25.5%
   3 Monolith 1.0                   57      18    1000   58.2%   28.6%
   4 Cheese 2.1 64 bits             55      19    1000   57.8%   22.4%
   5 RuyDos 1.1.10                  45      19    1000   56.5%   24.8%
   6 Arminius 2018-12-23            22      19    1000   53.1%   23.8%
   7 XboardEngine                  -14      19    1000   47.9%   23.9%
   8 Shield 2.1                    -38      19    1000   44.6%   19.8%
   9 Fridolin 3.10                 -82      20    1000   38.4%   21.0%
Assets 3
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