A dominant second-half display ensured Chester Gladiators overcame a committed Runcorn team to start the league season with a win.
From the kick-off, it was evident Runcorn meant business and the Gladiators defence came under intense pressure but held firm.
Chester's first attack was pulled up when Aled Davies' pass to Tom Woods was ruled forward and the home team continued to dominate possession.
However, resolute defence from Chris Young and Chris Jones kept them out and five minutes before the end of the half Ben Stelmaszek released Woods, who scored his first senior try for a 6-0 lead at half-time.
A big tackle from Mark Kingsley upset the hosts following the restart but Chester kept disciplined and an 80 metre interception score from Daniel Munt gave them a 12-0 lead as Aled Davies landed his second conversion.
Powerful runs from Paul Foster and Chris Young on the next set laid the platform for Stelmaszek to step between defenders and touch down with Davies' conversion making the score 18-0.
Chester had wrestled control back from Runcorn and a smart break from Kingsley released Davies for another converted try before Kingsley got himself on the scoresheet with a brilliant length of the field run for a 30-0 lead.
Kellum Friday and Craig Jones led a determined defensive effort to keep Runcorn from scoring and Simon Quinn finished off a sweeping move to give the Gladiators a 36-0 lead.
Runcorn came back once more but Daniel Munt split the defence to run in for his second of the game and Davies converted to maintain his perfect record with the boot.
Chester had to defend three consecutive sets in the final minutes with Paul Welch and Stelmaszek making some vital tackles to protect the clean sheet and ensure the game finished 42-0.
Head coach David Kirby said: "Runcorn threw everything at us but our defence stayed strong.
"Before the kick-off we talked about keeping a clean sheet and the lads defended as if their lives depended on it.
"It was another fantastic team display and the third clean sheet in a row. That's 172 points scored in three games and no points conceded, which is outstanding."