diff --git a/src/chess.ts b/src/chess.ts
index 4db512b..5fbfafd 100644
--- a/src/chess.ts
+++ b/src/chess.ts
@@ -115,6 +115,18 @@ export const SQUARES: Square[] = [
   'a1', 'b1', 'c1', 'd1', 'e1', 'f1', 'g1', 'h1'
 ]
 
+//prettier-ignore
+export const POSITION_COORDINATES = [
+  ['a8', 'b8', 'c8', 'd8', 'e8', 'f8', 'g8', 'h8'],
+  ['a7', 'b7', 'c7', 'd7', 'e7', 'f7', 'g7', 'h7'],
+  ['a6', 'b6', 'c6', 'd6', 'e6', 'f6', 'g6', 'h6'],
+  ['a5', 'b5', 'c5', 'd5', 'e5', 'f5', 'g5', 'h5'],
+  ['a4', 'b4', 'c4', 'd4', 'e4', 'f4', 'g4', 'h4'],
+  ['a3', 'b3', 'c3', 'd3', 'e3', 'f3', 'g3', 'h3'],
+  ['a2', 'b2', 'c2', 'd2', 'e2', 'f2', 'g2', 'h2'],
+  ['a1', 'b1', 'c1', 'd1', 'e1', 'f1', 'g1', 'h1']
+];
+
 const BITS: Record<string, number> = {
   NORMAL: 1,
   CAPTURE: 2,