From 08924e49d231c95690ca5c944fdc7f4166c98472 Mon Sep 17 00:00:00 2001
From: Camden Dixie O'Brien <cdo@wip.sh>
Date: Thu, 24 Nov 2022 23:52:08 +0000
Subject: [PATCH] Add Makefile rule to extract puzzle solutions

---
 .gitignore | 1 +
 Makefile   | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/.gitignore b/.gitignore
index c56e7f0..d3b07e1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@ sudoku
 sudoku.csv
 puzzles
 results
+solns
 
 # Clangd files
 .cache/*
diff --git a/Makefile b/Makefile
index afc4e58..c81b22b 100644
--- a/Makefile
+++ b/Makefile
@@ -41,6 +41,9 @@ solve.o: solve.h
 puzzles: sudoku.csv
 	pv sudoku.csv | tail -n+2 | cut -d, -f1 | tr -d '\n' > $@
 
+solns: sudoku.csv
+	pv sudoku.csv | tail -n+2 | cut -d, -f2 | tr -d '\n' > $@
+
 results:
 	dd if=/dev/zero of=$@ bs=1000 count=729000