Version 3.5

In this version I spend efforts in refactoring and low-level optimizations.

Still some Elo-gaining features added or updated:

• added very basic form of LMR;
• added depth/8 as extra reduction factor;
• revisited check extension, single reply extensions and reductions;
• added check evasion move history table;
• 3-fold repetition draw checks in PV-nodes and 2-fold in non-PV;
• time-management tuning;
• killer move and move ordering tweaks;

Fixes:

• fixed truncated PV caused by aborted search of the 1st move in iteration;
• changed best root move reports last finished iteration depth;
• info pv string during search shows instant (relative to previous info string) NPS instead of average;
• default and minimum Move Overhead is 1.5ms (displayed as 1);

Attached Windows and Android builds by Jim Ablett: talkchess.com/forum/viewtopic.php?p=993564

bench result:

5'353256 tt-writes, 2'420427 tt-hits, 11'666428 tt-reads
26'056785 nodes 7'252071 usec 3'593012 nps