diff --git a/src/test/resources/sudoku10.txt b/src/test/resources/sudoku10.txt
new file mode 100644
index 0000000..f8a814b
--- /dev/null
+++ b/src/test/resources/sudoku10.txt
@@ -0,0 +1,9 @@
+9 5 7 6 1 3 2 4 8
+4 8 3 2 5 7 1 6 9
+6 1 2 8 4 9 5 7 3
+1 7 8 3 6 4 9 2 5
+5 2 4 9 7 1 3 8 6
+8 4 5 7 9 2 6 3 1
+3 6 9 5 2 8 7 1 4
+2 9 1 4 3 6 8 5 7
+7 3 6 1 8 5 4 9 2
\ No newline at end of file
diff --git a/src/test/resources/sudoku9.txt b/src/test/resources/sudoku9.txt
new file mode 100644
index 0000000..f7a3fda
--- /dev/null
+++ b/src/test/resources/sudoku9.txt
@@ -0,0 +1,9 @@
+9 5 7 6 1 3 2 8 4
+4 8 3 2 5 7 1 9 6
+6 1 2 8 4 9 5 3 7
+1 7 8 3 6 4 9 5 2
+5 2 4 9 7 1 3 6 8
+8 4 5 7 9 2 6 1 3
+3 6 9 5 2 8 7 4 1
+2 9 1 4 3 6 8 7 5
+7 3 6 1 8 5 4 2 9
\ No newline at end of file
diff --git a/src/test/resources/testdata.csv b/src/test/resources/testdata.csv
index 2979be3..b7a8a83 100644
--- a/src/test/resources/testdata.csv
+++ b/src/test/resources/testdata.csv
@@ -5,4 +5,6 @@ sudoku4.txt, true
 sudoku5.txt, false
 sudoku6.txt, true
 sudoku7.txt, true
-sudoku8.txt, false
\ No newline at end of file
+sudoku8.txt, false
+sudoku9.txt, false
+sudoku10.txt, false
\ No newline at end of file