1 files changed, 8 insertions, 0 deletions

diff --git a/doc/nissy.1 b/doc/nissy.1
index fea5ddb..549cc4f 100644
--- a/doc/nissy.1
+++ b/doc/nissy.1
@@ -127,6 +127,14 @@ Allow use of NISS.
 .It Fl o
 Only find solutions that require the minimum number of moves.
 .
+.It Fl O Ar N
+Only find solutions that require at most
+.Ar N
+moves more than the optimal solution. If
+.Ar N
+is 0, this is equivalent to
+.It Fl o
+.
 .It Fl p
 Plain style: do not print the number of moves.
 .