diff --git a/js/goals/piece-structures.js b/js/goals/piece-structures.js
index fad74a6..4b0050d 100644
--- a/js/goals/piece-structures.js
+++ b/js/goals/piece-structures.js
@@ -12,18 +12,19 @@ module.exports = {
     },
 
     tripleDoublePawns: function (position) {
-        // Fast check for any kind of doubled pawns to quickly eliminate most positions
-        if (!/P[A-Za-z.]{7}P|p[A-Za-z.]{7}p/.test(position)) {
-            return false
-        }
-
         for (const piece of ['P', 'p']) {
-            const inFile = new Set()
-            const re = new RegExp(`${piece}(?=[A-Za-z.]{7}${piece})`, 'g')
-            for (const m of position.matchAll(re)) {
-                inFile.add(m.index % 8)
+            let doublePawnCount = 0
+            for (let file = 0; file < 8; file++) {
+                let pawnsOnFile = 0
+                for (let rank = 1; rank < 7; rank++) {
+                    if (position[file + rank * 8] === piece) {
+                        pawnsOnFile++
+                    }
+                }
+                if (pawnsOnFile >= 2) doublePawnCount++
             }
-            if (inFile.size > 2) {
+
+            if (doublePawnCount >= 3) {
                 return piece === 'P' ? 'white' : 'black'
             }
         }
diff --git a/tests/pawn-stacks.test.js b/tests/pawn-stacks.test.js
index 28c6743..d9d5331 100644
--- a/tests/pawn-stacks.test.js
+++ b/tests/pawn-stacks.test.js
@@ -50,6 +50,16 @@ test('test quad pawns do not count for triple double pawns', () => {
     expect(pieceStructures.tripleDoublePawns(fenToPosition(fen))).toBe(false)
 })
 
+test('triple double pawns with spaces in between', () => {
+    let fen = '4k3/6P1/5n2/1N1P2P1/1P1q4/3P4/1P6/4K3 w - - 0 1'
+    expect(pieceStructures.tripleDoublePawns(fenToPosition(fen))).toBe('white')
+})
+
+test('realistic position of triple double pawns with spaces in between', () => {
+    let fen = '4k3/q2p3p/p6p/P6p/P1P3Qp/7P/2P4P/4K3 w - - 0 1'
+    expect(pieceStructures.tripleDoublePawns(fenToPosition(fen))).toBe('white')
+})
+
 test('test 6 pawns in the same file', () => {
     let fen = 'k7/3p4/3p4/3p4/3P4/3P4/3P4/K7 w - - 0 1'
     expect(pieceStructures.sixPawnsInTheSameFile(fenToPosition(fen))).toBe(true)