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diff --git a/nandgame/cond_check.sv b/nandgame/cond_check.sv
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+// nandgame condition checker
+
+`timescale 1us/1us
+
+module  cond_check #(
+  parameter DATA_WIDTH = 16
+) (
+  input [(DATA_WIDTH-1):0] X,
+  input wire ltz,
+  input wire eqz,
+  input wire gtz,
+  output wire res
+);
+
+wire ltr, eqr, gtr, greater_zero;
+assign greater_zero = X[(DATA_WIDTH - 1)] == 0;
+assign ltr = ltz && !greater_zero;
+assign gtr = gtz && greater_zero && !(X == 0);
+assign eqr = eqz && (X == 0);
+
+assign res = ltr || gtr || eqr;
+
+endmodule