diff --git a/Makefile b/Makefile
index 8eff347..7fbfd41 100644
--- a/Makefile
+++ b/Makefile
@@ -64,10 +64,12 @@ CPPFLAGS  += -DWARN_ON                                      # brlib bug.h
 #CPPFLAGS  += -DDEBUG_DEBUG                                  # enable log() functions
 #CPPFLAGS  += -DDEBUG_DEBUG_C                                # enable log() settings
 #CPPFLAGS  += -DDEBUG_POOL                                   # memory pools management
-#CPPFLAGS  += -DDEBUG_FEN                                    # FEN decoding
 #CPPFLAGS  += -DDEBUG_POS				     # position.c
 #CPPFLAGS  += -DDEBUG_MOVE                                   # move generation
 
+# fen.c
+#CPPFLAGS  += -DDEBUG_FEN                                    # FEN decoding
+
 # attack.c
 #CPPFLAGS  += -DDEBUG_ATTACK_ATTACKERS1			     # sq_attackers details
 CPPFLAGS  += -DDEBUG_ATTACK_ATTACKERS			    # sq_attackers
@@ -284,8 +286,9 @@ memcheck: targets
 ##################################### test binaries
 .PHONY: testing test
 
-TEST          := fen-test bitboard-test movegen-test attack-test
+TEST          :=piece-test fen-test bitboard-test movegen-test attack-test
 
+PIECE_OBJS    := piece.o
 FEN_OBJS      := fen.o position.o piece.o bitboard.o board.o hyperbola-quintessence.o \
 	attack.o
 BB_OBJS       := fen.o position.o piece.o bitboard.o board.o hyperbola-quintessence.o \
@@ -297,6 +300,7 @@ ATTACK_OBJS   := fen.o position.o piece.o bitboard.o board.o hyperbola-quintesse
 
 TEST          := $(addprefix $(BINDIR)/,$(TEST))
 
+PIECE_OBJS    := $(addprefix $(OBJDIR)/,$(PIECE_OBJS))
 FEN_OBJS      := $(addprefix $(OBJDIR)/,$(FEN_OBJS))
 BB_OBJS       := $(addprefix $(OBJDIR)/,$(BB_OBJS))
 MOVEGEN_OBJS  := $(addprefix $(OBJDIR)/,$(MOVEGEN_OBJS))
@@ -308,6 +312,10 @@ test:
 
 testing: $(TEST)
 
+bin/piece-test: test/piece-test.c $(FEN_OBJS)
+	@echo compiling $@ test executable.
+	@$(CC) $(ALL_CFLAGS) $< $(FEN_OBJS) $(ALL_LDFLAGS) -o $@
+
 bin/fen-test: test/fen-test.c test/common-test.h $(FEN_OBJS)
 	@echo compiling $@ test executable.
 	@$(CC) $(ALL_CFLAGS) $< $(FEN_OBJS) $(ALL_LDFLAGS) -o $@
diff --git a/test/common-test.h b/test/common-test.h
index 9ffa8c2..3064379 100644
--- a/test/common-test.h
+++ b/test/common-test.h
@@ -35,6 +35,41 @@ struct fentest {
      */
     //"4k3/pppppppp/8/8/8/8/PPPPPPPP/2BRK3 w - - 0 1",
     //"4k3/pppppppp/8/8/8/8/PPPPPPPP/1B1R1K2 w - - 0 1",
+    { MOVEGEN,
+      "illegal white e.p.",
+      "3k4/8/8/2qpPK2/8/8/8/8 w - d6 0 1",
+    },
+    { MOVEGEN,
+      "illegal black e.p.",
+      "8/8/8/8/2QPpk2/8/8/3K4 b - d3 0 1",
+    },
+
+    { MOVEGEN,
+      "illegal white e.p.",
+      "3k4/8/5K2/3pP3/8/2b5/8/8 w - d6 0 1",
+    },
+    { MOVEGEN,
+      "illegal black e.p.",
+      "8/8/2B5/8/3Pp3/5k2/8/3K4 b - d3 0 1",
+    },
+
+    { MOVEGEN,
+      "legal white e.p.",
+      "1K1k4/8/8/3pP3/8/6b1/8/8 w - d6 0 1",
+    },
+    { MOVEGEN,
+      "legal black e.p.",
+      "8/8/6B1/8/3Pp3/8/8/1k1K4 b - d3 0 1",
+    },
+
+    { MOVEGEN,
+      "white mate.",
+      "1nbqkbn1/ppp1pppp/8/r1rpP1K1/8/8/PPPP1PPP/RNBQ1BNR w - d6 0 1",
+    },
+    { MOVEGEN,
+      "illegal e.p.",
+      "1nbqkbn1/ppp1pppp/8/r1rpP1K1/8/8/PPPP1PPP/RNBQ1BNR w - d6 0 1",
+    },
     { ATTACK,
       "checkers: a1 h1",
       "1k6/8/8/8/8/8/8/r2K3r w - - 1 1"
@@ -163,7 +198,7 @@ struct fentest {
       "6k1/6pp/R2p4/p1p5/8/1P1r3P/6P1/6K1 b - - 3 3"
     },
 
-    // below tests are from:
+    // some of tests below are from:
     // - Rodent IV
     // - https://www.chessprogramming.net/perfect-perft/
     { FEN | MOVEGEN,
@@ -174,6 +209,10 @@ struct fentest {
       "",
       "8/2p5/3p4/KP5r/1R3p1k/8/4P1P1/8 w - - 0 1"
     },
+    { FEN | MOVEGEN,
+      "",
+      "8/2p5/3p4/Kp5r/1R3p1k/8/4P1P1/8 w - - 0 1"
+    },
     { FEN | MOVEGEN,
       "",
       "4rrk1/pp1n3p/3q2pQ/2p1pb2/2PP4/2P3N1/P2B2PP/4RRK1 b - - 7 19"
diff --git a/test/piece-test.c b/test/piece-test.c
index dbb6b65..d8f7f27 100644
--- a/test/piece-test.c
+++ b/test/piece-test.c
@@ -1,55 +1,20 @@
 #include <stdio.h>
 
-#include "debug.h"
+#include "brlib.h"
 
-#include "../src/fen.h"
-#include "../src/position.h"
-#include "../src/bitboard.h"
+#include "piece.h"
 
-int main(int ac, char**av)
+int main(__unused int ac, __unused char**av)
 {
-    pos_t *pos;
-    printf("zobi\n");fflush(stdout);
-    debug_init(6, stderr, true);
-    log_f(5, "kfsjdhg\n");
-    pos_pool_init();
-    pos = pos_get();
-    piece_pool_init();
 
-    if (ac == 1) {
-    printf("zoba\n");fflush(stdout);
-        pos_startpos(pos);
-    } else {
-        fen2pos(pos, av[1]);
+    piece_t p;
+    char *test="PNBRQKpnbrqk";
+
+    for (u64 i = 0; i < sizeof(test); ++i) {
+        char c1 = test[i], *c2;
+        p = piece_from_fen(c1);
+        c2 = piece_to_fen(p);
+        printf("c1=%c c2=%c\n", c1, *c2);
     }
-    pos_print(pos);
-    pos_pieces_print(pos);
-
-    printf("0x1c = 11100 = C1-E1:\n");
-    bitboard_print(0x1c);
-
-    printf("0x70 = 111 = A1-C1\n");
-    bitboard_print(0x70);
-
-    printf("0x0e = 1110 = B1-D1\n");
-    bitboard_print(0x0e);
-
-    printf("0x60 = 1100000 = F1-G1\n");
-    bitboard_print(0x60);
-
-    printf("A1:\n");
-    bitboard_print(A1);
-
-    printf("1:\n");
-    bitboard_print(1L);
-    printf("H1:\n");
-    bitboard_print(H1);
-    printf("C1:\n");
-    bitboard_print(C1);
-    printf("D1:\n");
-    bitboard_print(D1);
-    printf("C1|D1:\n");
-    bitboard_print(C1|D1);
-    printf("H8:\n");
-    bitboard_print(H8);
+    return 0;
 }