From 4ffcd5dc8b0adf017148c5a88193a8562616303d Mon Sep 17 00:00:00 2001
From: Franklin Wei <me@fwei.tk>
Date: Mon, 14 Aug 2017 17:22:59 -0400
Subject: Add more config validity checks

---
 pattern.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'pattern.c')

diff --git a/pattern.c b/pattern.c
index b9a3d6e..df720b7 100644
--- a/pattern.c
+++ b/pattern.c
@@ -176,6 +176,8 @@ static const char *validate_params(const game_params *params, bool full)
 {
     if (params->w <= 0 || params->h <= 0)
 	return "Width and height must both be greater than zero";
+    if (params->w * params->w < 2)
+        return "Grid must contain at least two squares";
     return NULL;
 }
 
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