diff --git a/solver.cpp b/solver.cpp
index f2b18a1..8218531 100644
--- a/solver.cpp
+++ b/solver.cpp
@@ -122,7 +122,7 @@ vector<bool> Solver::extract_info(Historic_guess hist) {
 				col_was_cleaned[hist.guess[n]] = true;
 
 		for(int n = 0; n < N; n++)
-			if(guess[n] > -1 && col_was_cleaned[guess[n]])
+			if(guess[n] > -1)
 				for(int n2 = 0; n2 < N; n2++)
 					if(known.final_color(n2) != guess[n])
 						known.cannot_be(n2, guess[n]);