From: protonspring <mike@whiteley.org>
Date: Thu, 5 Mar 2020 19:07:48 +0000 (-0700)
Subject: Cleanup KBPsK endgame
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=e7c1c8c1abd85a71fd8190e0c1af49214625904b;hp=e7c1c8c1abd85a71fd8190e0c1af49214625904b

Cleanup KBPsK endgame

* Clarify distinction between strong side pawns and all pawns.
* Simplify and speed-up determination of pawns on the same file.
* Clarify comments.
* more_than_one() is probably faster than pos.count.

Passed STC:
LLR: 2.95 (-2.94,2.94) {-1.50,0.50}
Total: 40696 W: 7856 L: 7740 D: 25100
Ptnml(0-2): 584, 4519, 10054, 4579, 612
http://tests.stockfishchess.org/tests/view/5e6153b1e42a5c3b3ca2e1a9

closes https://github.com/official-stockfish/Stockfish/pull/2574

No functional change.
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