diff --git a/exercises/exercise_000_sudoku_solver_initial_state/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_000_sudoku_solver_initial_state/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index eb29c6293..d25970cf4 100644
--- a/exercises/exercise_000_sudoku_solver_initial_state/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_000_sudoku_solver_initial_state/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,25 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO {
 
-  def printRow( row: ReductionSet): String = {
-    def printSubRow( subRowNo: Int): String = {
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  (elem <- row) 
-        yield {
-          (printItems.map (item => if ((elem & printItems.toSet).contains(item)) item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    }
-    (for  (subRow <- 0 until 3)  yield printSubRow(subRow)).mkString("\n")
-  }
-
-  def printRowShort( row: ReductionSet): String = {
-    (for (elem <- row)
-    yield {
-      if (elem.size == 1) elem.head.toString else " "
-    }).mkString("|","|","|")
-
-  }
-
   private def sudokuCellRepresentation(content: CellContent): String = {
     content.toList match {
       case Nil => "x"
diff --git a/exercises/exercise_001_dotty_deprecated_syntax_rewriting/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_001_dotty_deprecated_syntax_rewriting/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index eb29c6293..d25970cf4 100644
--- a/exercises/exercise_001_dotty_deprecated_syntax_rewriting/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_001_dotty_deprecated_syntax_rewriting/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,25 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO {
 
-  def printRow( row: ReductionSet): String = {
-    def printSubRow( subRowNo: Int): String = {
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  (elem <- row) 
-        yield {
-          (printItems.map (item => if ((elem & printItems.toSet).contains(item)) item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    }
-    (for  (subRow <- 0 until 3)  yield printSubRow(subRow)).mkString("\n")
-  }
-
-  def printRowShort( row: ReductionSet): String = {
-    (for (elem <- row)
-    yield {
-      if (elem.size == 1) elem.head.toString else " "
-    }).mkString("|","|","|")
-
-  }
-
   private def sudokuCellRepresentation(content: CellContent): String = {
     content.toList match {
       case Nil => "x"
diff --git a/exercises/exercise_002_dotty_new_syntax_and_indentation_based_syntax/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_002_dotty_new_syntax_and_indentation_based_syntax/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index bedfc32ca..702d5be9a 100644
--- a/exercises/exercise_002_dotty_new_syntax_and_indentation_based_syntax/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_002_dotty_new_syntax_and_indentation_based_syntax/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for elem <- row
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_003_top_level_definitions/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_003_top_level_definitions/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_003_top_level_definitions/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_003_top_level_definitions/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_004_parameter_untupling/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_004_parameter_untupling/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_004_parameter_untupling/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_004_parameter_untupling/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_005_extension_methods/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_005_extension_methods/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_005_extension_methods/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_005_extension_methods/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_006_using_and_summon/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_006_using_and_summon/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_006_using_and_summon/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_006_using_and_summon/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_007_givens/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_007_givens/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_007_givens/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_007_givens/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_008_enum_and_export/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_008_enum_and_export/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_008_enum_and_export/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_008_enum_and_export/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_009_union_types/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_009_union_types/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_009_union_types/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_009_union_types/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_010_opaque_type_aliases/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_010_opaque_type_aliases/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_010_opaque_type_aliases/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_010_opaque_type_aliases/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"
diff --git a/exercises/exercise_011_multiversal_equality/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala b/exercises/exercise_011_multiversal_equality/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
index 35a134188..e452c6a8f 100644
--- a/exercises/exercise_011_multiversal_equality/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
+++ b/exercises/exercise_011_multiversal_equality/src/main/scala/org/lunatechlabs/dotty/sudoku/SudokuIO.scala
@@ -4,22 +4,6 @@ import java.util.NoSuchElementException
 
 object SudokuIO:
 
-  def printRow( row: ReductionSet): String =
-    def printSubRow( subRowNo: Int): String =
-      val printItems = List(1,2,3).map( x => x + subRowNo * 3)
-      (for  elem <- row 
-        yield {
-          (printItems.map (item => if (elem & printItems.toSet).contains(item) then item.toString else " ")).mkString("")
-        }).mkString("| ", " | ", " |")
-    (for  subRow <- 0 until 3  yield printSubRow(subRow)).mkString("\n")
-
-  def printRowShort( row: ReductionSet): String =
-    (for (elem <- row)
-    yield {
-      if elem.size == 1 then elem.head.toString else " "
-    }).mkString("|","|","|")
-
-
   private def sudokuCellRepresentation(content: CellContent): String =
     content.toList match
       case Nil => "x"