Changed visibility from package to interal

Sources/Engine/Board.swift

@@ -29,19 +29,19 @@ public class Board: CustomStringConvertible {
 	public private(set) var fen: Fen
 
 	public func setBoard() throws {
-		var file: UInt8 = 1
-		var rank: UInt8 = 8
-		var index: UInt8 = 0
+		var file: Int8 = 1
+		var rank: Int8 = 8
+		var index: Int8 = 0
 		var b: [Square] = squares
 		for c in fen.placement {
-			let r = (8 - Int(rank)) % 8
+			let r = 8 - Int(rank)
 			if c == "/" {
 				if file != 9 {
 					throw Fen.FenError.NotAppropriateLength(n: file, column: index)
 				}
 				rank -= 1
 				file = 0
-			} else if c.isWholeNumber, let n = UInt8(String(c)) {
+			} else if c.isWholeNumber, let n = Int8(String(c)) {
 				if n < 1 {
 					throw Fen.FenError.NumberTooSmall(n: n, column: index)
 				} else if n > 8 {
@@ -82,20 +82,22 @@ public class Board: CustomStringConvertible {
 			file += 1
 			index += 1
 		}
-		print(b)
+		#if DEBUG 
+			print(b)	
+		#endif	
 		squares = b
 	}
 
 	public required init(fen: Fen = 
 		.init(fen: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1")
 	) {
-		var rank: UInt8 = 8
+		var rank: Int8 = 8
 		self.fen = fen
 		for i in 0...63 {
-			let index = UInt8(i)
+			let index = Int8(i)
 			let square = Square(
 				position: .init(file: (index % 8) + 1, rank: rank),
-				index: index,
+				index: i,
 				color: index % 2 != rank % 2 ? .Black : .White)
 			squares.append(square)
 			if (index + 1) % 8 == 0 {