Flag critical search tree in hash table

mirror of https://github.com/opelly27/Stockfish.git synced 2026-05-20 02:47:45 +00:00

Introducing new concept, saving principal lines into the transposition table
to generate a "critical search tree" which we can reuse later for intelligent
pruning/extension decisions.

For instance in this patch we just reduce reduction for these lines. But a lot
of other ideas are possible.

To go further : tune some parameters, how to add or remove lines from the
critical search tree, how to use these lines in search choices, etc.

STC :
LLR: 2.94 (-2.94,2.94) [0.50,4.50]
Total: 59761 W: 13321 L: 12863 D: 33577 +2.23 ELO
http://tests.stockfishchess.org/tests/view/5c34da5d0ebc596a450c53d3

LTC :
LLR: 2.96 (-2.94,2.94) [0.00,3.50]
Total: 26826 W: 4439 L: 4191 D: 18196 +2.9 ELO
http://tests.stockfishchess.org/tests/view/5c35ceb00ebc596a450c65b2

Special thanks to Miguel Lahoz for his help in transposition table in/out.

Bench: 3399866

This commit is contained in:

MJZ1977

2019-01-09 15:05:28 +01:00

committed by

Stéphane Nicolet

parent f69106f7bb

commit 70880b8e24

4 changed files with 31 additions and 16 deletions

									
										tests/instrumented.sh
									
		+1
		
												View File
												
				@@ -45,6 +45,7 @@ race:TTEntry::bound

				race:TTEntry::save

				race:TTEntry::value

				race:TTEntry::eval

				race:TTEntry::pv_hit

				race:TranspositionTable::probe

				race:TranspositionTable::hashfull