Huge TheKing Test of the performance of different Selectivity settings in the endgame Each Selectivity setting (s06, s09, s12, s16 and s20) of TheKing (Normal native settings (all material- and positional parameters = 100)) played 2100 games (300 games vs. each of the 7 opponents). Used opening-set was endgames.epd, an epd-collection of endgame-positions, which is used for testing in the Stockfish-Framework. https://github.com/official-stockfish/books/blob/master/endgames.epd.zip TheKing 3.50 PC-engine thinkingtime: 15 sec + 1.5 sec (around 20x faster on my PC than the TheKing Chesscomputer, so on Chesscomputer around 5 min + 30 sec thinkingtime). Opponents thinkingtime: 10 sec + 1 sec (Because King had only 512 Kbyte Hash (because the King-Element has only somewhat over 300 Kbyte Hashtables) and the 7 opponent engines had 128MByte Hash, the opponent engines got 1/3 less thinkingtime, than TheKing.) Program Elo + - Games Score Av.Op. Draws 1 Delfi 5.4 : 2581 12 12 1500 57.4 % 2529 46.3 % 2 TheKing Normal s20 : 2558 10 10 2100 53.4 % 2534 45.3 % 3 Rebel 13 : 2547 12 12 1500 52.6 % 2529 46.2 % 4 TheKing Normal s16 : 2545 10 10 2100 51.5 % 2534 46.0 % 5 K2 0.95 : 2543 11 11 1500 52.0 % 2529 46.7 % 6 Gandalf 7 : 2542 12 12 1500 51.9 % 2529 48.2 % 7 TheKing Normal s12 : 2532 10 10 2100 49.8 % 2534 47.7 % 8 Ruffian Leiden : 2524 11 11 1500 49.4 % 2529 43.7 % 9 TheKing Normal s09 : 2513 10 10 2100 47.0 % 2534 44.6 % 10 RedQueen 1.1.98 : 2507 12 12 1500 46.9 % 2529 42.8 % 11 TheKing Normal s06 : 2497 10 10 2100 44.7 % 2534 43.9 % 12 Orion 0.6 : 2494 12 12 1500 45.1 % 2529 44.7 % Games : 10500 (finished) White Wins : 3181 (30.3 %) Black Wins : 2542 (24.2 %) Draws : 4777 (45.5 %) Conclusions: It is very clear, that the performance of TheKing is better, the higher the Selectivity is set. Selectivity 20 scored +61 Elo (!) better in the endgame, than Selectivity 6 (which was default in the old TheKing Chesscomputers (Tasc R30, Montreux, Risc 2500). So, it is very clear, that the "AUTO" (default) setting of the Selectivity in the TheKing Chesscomputers is complete nonsense, because Auto-Selectivity means, the Selectivity gets lower and lower, the lower the number of pieces on the board gets. So, it is strongly recommended, to set the Selectivity at least to 16, better 20 in each user-setting, otherwise a lot of Elo-performance is lost in the endgame!!! (The played games of this test-tournaments are included in the games-download of the TrS-settings testruns games download on this site).