pirarucu and AllieStein will go the division 4 playoffs, Wasp and Marvin will participate in the cup event later this season.
pirarucu started strong with 8 wins in the first 9 games, it held on to first place despite a weaker second half. AllieStein and Wasp were better in the second half of the division, Wasp crashed in a critical game against AllieStein and this meant AllieStein had the tiebreak advantage. In the end there was no need for a tiebreak.
There were two crashes in this division, in both cases the crashing engine was not new to TCEC (Wasp and chess22k). Of the 5 new engines Jumbo and Bagatur were weak, AllieStein, Marvin and Monollith were better. There were two NN based engines in the division, ScorpioNN and AllieStein. The network crashed in one game (chess22k - AllieStein) and due to a new TCEC rule the game was not replayed but resumed, with added time to compensate for the lost information.
Final crosstable playoffs
AllieStein and Nemorino progress to division 3.
AllieStein dominated the playoffs with 8/12 wins and one loss. It beat Nemorino in all their 4 games and had a positive score against the other engines as well. This performance was surprising, in division 4b it struggled to qualify for the playoffs. This was explained in part by the worse performance of pirarucu. After finishing first in division 4b pirarucu crashed twice in the playoffs and was reduced to 16 threads. Without the crashes pirarucu could have been the second qualifier.
AllieStein and Nemorino join Gull, Texel, Arasan, Vajolet, Pedone and rofChade in division 3. Can AllieStein continue to climb, a second NN engine in the higher TCEC divisions? I don't think so, some of the other engines have new versions and Gull should also be tough to beat despite not being developed anymore. We shall soon see...
nice summary
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