Late move reduction, captures and CUT nodes

Expand of Stefan Geschwentner's original idea: we always do LMR for captures at cutnodes.

Passed STC
http://tests.stockfishchess.org/tests/view/5d5b2f8e0ebc5925cf1111b8
LLR: 2.96 (-2.94,2.94) [0.50,4.50]
Total: 36026 W: 8122 L: 7779 D: 20125

Passed LTC
http://tests.stockfishchess.org/tests/view/5d5b40c80ebc5925cf111353
LLR: 3.22 (-2.94,2.94) [0.00,3.50]
Total: 133502 W: 22508 L: 21943 D: 89051

Closes official-stockfish#2273

Bench: 3494372

src/Makefile

@@ -24,8 +24,8 @@
 ### ==========================================================================
 
 ### Executable name
-### Honey bench nodes -----> 4139590 > based on commits up to 8/15/2019
-### stockfish bench nodes -> 4024328 > based on commits up to 8/15/2019
+### Honey bench nodes -----> 4779507 > based on commits up to 8/21/2019
+### stockfish bench nodes -> 3494372 > based on commits up to 8/21/2019
 
 ####  Always leave the three lines below as is (any subsequent defines will override)
 DATE=$(shell date +"%m%d%y")
@@ -39,13 +39,13 @@ RELVERSION = X5i
 ### TEST versions, enter yes and labels below to build named test exe's
 TEST = no
 TESTv1 = $(DATE2)
-TESTv2 =
+TESTv2 = 
 ifeq ($(TEST),yes)
 CXXFLAGS += -DTest
 endif
 
 ### Uncomment the line below for Honey, comment out for Stockfish
-	VERSION=sullivan
+###	VERSION=sullivan
 
 ### Uncomment for use with Raspberry Pi -  a slower NPS UCI option setting used in Play
 ### by Elo and personalities

src/search.cpp

@@ -1369,7 +1369,8 @@ namespace {
           &&  moveCount > 1 + 3 * rootNode
           && (  !captureOrPromotion
               || moveCountPruning
-              || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha))
+              || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha
+              || cutNode))
       {
           Depth r = reduction(improving, depth, moveCount);