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[[Move Generation#Staged|Staged move generation]] and a simpler [[Evaluation|evaluation]] inspired by [[Xiphos]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=7&t=68842 The Xiphos Material Evaluator] by [[Dennis Sceviour]], [[CCC]], November 05, 2018</ref>,
a lot of [[Engine Testing|testing]] and [[Automated Tuning|tuning]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=68775&start=32 Re: Schooner 2] by [[Dennis Sceviour]], [[CCC]], November 02, 2018</ref>, and
using [https://en.wikipedia.org/wiki/GNU_Compiler_Collection GCC] v7.2.0 were explicitly mentioned as a possible explanation for that improvement <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=68775&start=22 Re: Schooner 2] by [[Dennis Sceviour]], [[CCC]], October 31, 2018</ref> .
Schooner 2 further supports a subset of [[UCI]] to automatically play games without [[Pondering|pondering]].
