diff --git a/BN14.md b/BN14.md
index 81483a89e..890195227 100644
--- a/BN14.md
+++ b/BN14.md
@@ -24,3 +24,8 @@ Every equation contributes to completing the BN faster.
 I need equations that test many different aspect of "math culture", it can be chaos theory, quantum mechanic, weird polynomials, etc.
 
 All variable purchasing will be scriptable.
+
+
+All equation must have:
+- several variables that can be upgraded, at least 1 variable must be strategic in it's upgrading (upgrading too much can cause drop in performance)
+- Some sort of math twist that requires some thinking, like (-2)^c1 alters between positive and negative.