diff --git a/README.md b/README.md
index e69de29..79ce47a 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,7 @@
+todo:
+
+* make dimensionality n^2 x n^2
+* enforce solution range is in 1..n^2
+* enforce closure of rows, columns and groups
+* make input to circuit an encryption of the solution
+* make input of the circuit a commitment of the decryption key