diff --git a/solver/flags.go b/solver/flags.go
index e27502b..081d029 100644
--- a/solver/flags.go
+++ b/solver/flags.go
@@ -31,17 +31,15 @@ func (solver *Solver) parse_flags() {
 	flag.StringVar(&row8, "row8", "000000000", "8th row of the sudoku puzzle.")
 	flag.StringVar(&row9, "row9", "000000000", "9th row of the sudoku puzzle.")
 
-	// Print additional help data
-	flag.Usage = func() {
-		fmt.Fprintf(flag.CommandLine.Output(), "Usages of %s:\n", os.Args[0])
-		fmt.Fprintf(flag.CommandLine.Output(), "\nPut every row of a Sudoku puzzle as paramters.\nUse '0' for what is currently blank in the puzzle you wish to solve.\n\n")
-		fmt.Fprintf(flag.CommandLine.Output(), "Example: %s -row1 ... -row2 ... -row3 ... (etc)\n\n", os.Args[0])
-		flag.PrintDefaults()
-	}
-
 	// Parse the flags
 	flag.Parse()
 
+	if row1 == "000000000" || row2 == "000000000" || row3 == "000000000" || row4 == "000000000" || row5 == "000000000" || row6 == "000000000" || row7 == "000000000" || row8 == "000000000" || row9 == "000000000" {
+		log.Printf("ERROR: All parameters must be entered.\n\n")
+		solver.print_Usage()
+		os.Exit(1)
+	}
+
 	// Validate the row (never trust user input)
 	solver.validate_row("row1", row1)
 	solver.validate_row("row2", row2)
@@ -74,7 +72,8 @@ func (solver *Solver) validate_row(name string, row string) {
 
 	// 1. Make sure the row is 9 in length
 	if len(row) != 9 {
-		log.Printf("ERROR: Invalid length of %s; %s must be 9 numbers", name, row)
+		log.Printf("ERROR: Invalid length of %s (%s), must be 9 numbers\n\n", name, row)
+		solver.print_Usage()
 		os.Exit(1)
 	}
 
@@ -84,7 +83,8 @@ func (solver *Solver) validate_row(name string, row string) {
 	}
 
 	if !found {
-		log.Printf("ERROR: Invalid character of %s; %s must be 9 numbers", name, row)
+		log.Printf("ERROR: Invalid character of %s (%s), must be 9 numbers\n\n", name, row)
+		solver.print_Usage()
 		os.Exit(1)
 	}
 
@@ -100,7 +100,8 @@ func (solver *Solver) validate_row(name string, row string) {
 	}
 
 	if double {
-		log.Printf("ERROR: Double character of %s; %s numbers between 1 and 9 may only be entered once", name, row)
+		log.Printf("ERROR: Double character of %s (%s), numbers between 1 and 9 may only be entered once\n\n", name, row)
+		solver.print_Usage()
 		os.Exit(1)
 	}
 
@@ -118,3 +119,10 @@ func (solver *Solver) valid_char(char rune) bool {
 
 	return valid
 }
+
+func (solver *Solver) print_Usage() {
+	fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s:\n", os.Args[0])
+	fmt.Fprintf(flag.CommandLine.Output(), "\nPut every row of a Sudoku puzzle as paramters.\nUse '0' for what is currently blank in the puzzle you wish to solve.\n\n")
+	fmt.Fprintf(flag.CommandLine.Output(), "Example: %s -row1 ... -row2 ... -row3 ... (etc)\n\n", os.Args[0])
+	flag.PrintDefaults()
+}