diff --git a/Board.h b/Board.h
index 2c34698..b3d6bdb 100644
--- a/Board.h
+++ b/Board.h
@@ -216,7 +216,6 @@ void make(Move m) {
 	}
 
 	// are we promoting?
-	byte new_val = m.pc_prom & 0b1111;
 	if(m.pc_prom != P_EMPTY) {
 		// promoting; indicate this in the sq_to byte in unmove.
 		field[m.sq_to] = m.pc_prom;
diff --git a/Movegen.h b/Movegen.h
index fe0c3c1..f7f4b3e 100644
--- a/Movegen.h
+++ b/Movegen.h
@@ -4,8 +4,8 @@
 #include "Types.h"
 #include "Move.h"
 
-const static byte SLIDE_OFFSETS[] = {-1, 1, -16, 16, 15, 17, -15, -17};
-const static byte KNIGHT_OFFSETS[] = {-31, 31, -33, 33, -18, 18, -14, 14};
+const static byte SLIDE_OFFSETS[] = {255, 1, 240, 16, 15, 17, 241, 239};
+const static byte KNIGHT_OFFSETS[] = {225, 31, 223, 33, 238, 18, 242, 14};
 
 #define INVALID_MOVE Move{0xFF, 0xFF, P_EMPTY}
 
@@ -136,7 +136,7 @@ Move Movegen::generate_pawn() {
 			offset = color ? -0x10 : 0x10;
 			target_square = square + offset;
 			if(field[target_square] ||
-			   (square & 0x70) == (color ? 0x10 : 0x60)
+			  (square & 0x70) == (color ? 0x10 : 0x60)
 			) {
 				// moving ahead is not possible, not even a capture!
 				// this is either due to a blockade or a pending promotion
diff --git a/Types.h b/Types.h
index fdf2202..3b12c24 100644
--- a/Types.h
+++ b/Types.h
@@ -1,7 +1,7 @@
 #ifndef __TYPES_H_INC
 #define __TYPES_H_INC
 
-#include "Config.h""
+#include "Config.h"
 
 #ifdef _ACF_DEBUG_PRINT
 #define DEBUG(x) Serial.println(F(x)); Serial.flush()