Fix recapture extension extending non-captures (#423)

Bench: 4585775

STC
ELO | 4.61 +- 3.84 (95%)
SPRT | 10.0+0.10s Threads=1 Hash=8MB
LLR | 2.94 (-2.94, 2.94) [-2.50, 0.50]
GAMES | N: 14472 W: 3431 L: 3239 D: 7802

LTC
ELO | -0.09 +- 2.32 (95%)
SPRT | 60.0+0.60s Threads=1 Hash=64MB
LLR | 0.86 (-2.94, 2.94) [-2.50, 0.50]
GAMES | N: 37576 W: 8224 L: 8234 D: 21118

Author: jhonnold

src/makefile

@@ -4,7 +4,7 @@
 EXE      = berserk
 SRC      = *.c pyrrhic/tbprobe.c
 CC       = gcc
-VERSION  = 20221129
+VERSION  = 20221206
 MAIN_NETWORK = networks/berserk-c982d9682d4e.nn
 EVALFILE = $(MAIN_NETWORK)
 DEFS     = -DVERSION=\"$(VERSION)\" -DEVALFILE=\"$(EVALFILE)\" -DNDEBUG

src/move.c

@@ -96,6 +96,8 @@ char* MoveToStr(Move move, Board* board) {
 }
 
 inline int IsRecapture(SearchData* data, Move move) {
+  if (!IsCap(move)) return 0;
+
   Move parent           = data->moves[data->ply - 1];
   Move greatGrandParent = data->ply > 2 ? data->moves[data->ply - 3] : NULL_MOVE;