Code:

CCRL 40/15 Rating List - Custom engine selection
1189229 games played by 2732 programs, run by 23 testers
Ponder off, General books (up to 12 moves), 3-4-5 piece EGTB
Time control: Equivalent to 40 moves in 15 minutes on an Intel i7-4770k.
Computed on November 7, 2020 with Bayeselo based on 1'189'229 games
Tested by CCRL team, 2005-2020, http://ccrl.chessdom.com/ccrl/4040/

Rank                Engine                  Elo  +    -  Score  AvOp  Games
1 Igel 2.8.0 64-bit                      3267  +17  -17  44.0%  +37.9  962
  Igel 2.7.0 64-bit                      3240  +17  -17  38.1%  +74.7  1092
  Igel 2.6.0 64-bit                      3116  +22  -22  49.6%  +3.1  616
  Igel 2.5.0 64-bit                      3084  +23  -23  49.4%  +3.1  555
  Igel 2.4.0 64-bit                      3068  +21  -21  49.6%  +2.7  686
  Igel 2.3.1 64-bit                      3056  +24  -24  54.6%  -34.3  543
  Igel 2.3.0 64-bit                      2987  +27  -27  49.1%  +4.6  438
  Igel 2.0.0 64-bit                      2934  +26  -26  52.9%  -22.5  460
  Igel 1.9.0 64-bit                      2878  +28  -28  50.8%  -7.9  414
  Igel 1.8.3 64-bit                      2822  +28  -28  49.4%  +5.0  414
  Igel 1.7.0 64-bit                      2796  +29  -29  51.1%  -6.7  398
  Igel 1.6.0 64-bit                      2765  +20  -20  52.1%  -17.1  884
  Igel 1.4.2 64-bit                      2667  +27  -27  47.6%  +17.4  450
  Igel 1.4.1 64-bit                      2660  +27  -27  49.1%  +3.8  468
  Igel 1.1 64-bit                        2628  +26  -26  48.0%  +13.0  502
  Igel 1.2 64-bit                        2627  +19  -19  48.7%  +8.6  926

@Graham Banks wrote:

PGN - http://kirill-kryukov.com/chess/discussion-board/download/file.php?id=47346

@lisandr wrote:It would be good to indicate what settings were

@Graham Banks wrote:

@lisandr wrote:It would be good to indicate what settings were

Igel 2.8.0 uses its NNUE by default.