On another night Thistle could have scored a further two nor three goals but they safely make their way through to a third round date with Dundee United. 

Murray gallops into space on the right but Gordon can't find the net with his shot when the cross comes over. 

Penrice's shot slams into the body of a Cowdenbeath defender. 

Into injury time now. 

Lyon is unlucky not to get his name on the score sheet with Hogarth producing a good stop to keep out his shot from the edge of the box. 

Lyon tries to send Tiffoney clear with a ball over the top but Tiffoney doesn't time his run and the flag goes up for offside. 

Graham tries to find Tiffoney at the back post with a low cross but Hogarth is able to intercept. 

Hogarth is close to fumbling a Graham header from a McKenna cross over the line but manages to hold on. 

Graham cuts in from the left hand side but gets his final shot all wrong as the ball soars high and wide of the goal. 

Tiffoney takes the free kick but it is headed away from Gordon who tries to get on the end of it. 

Bannigan is pushed to the ground and Thistle will have a free kick just in from the left touchline. 

Nobody is able to get on the end of Tiffoney's corner. The game has become a bit untidy since Thistle's third goal. 

Tiffoney and Bannigan try to work a short corner with no success. 

It's a good corner, whipped into a dangerous area but the referee spots a foul and Thistle have a free kick. 

That should see Thistle safely through to the next round. On just for a few minutes, Murray gets the ball at the edge of the Cowdenbeath box and shoots into the bottom left corner of Hogarth's goal. 

Still no joy for MacIver who looks to be fouled inside the box but there is no penalty forthcoming. 

MacIver is having no luck in front of goal. Cardle's cross finds him in space but he can't direct his header away from Hogarth. 

Cardle's corner is cleared as far as Bannigan lurking outside the box. He works out right back to Cardle who crosses deep to the back post where MacIver sends a shot about a foot over the bar. 

Mullen's free kick is well enough struck but Wright is right behind it and completes a save even if he does need two attempts to safely gather the ball. 

In trying to correct an earlier error, Niang concedes a free kick just outside his ow box. 

Thistle do have a second goal and it's a first Thistle goal for Zak Rudden. Cardle robs Glass of the ball and Rudden is able to bundle home Cardle's cross from close range. 

Still no second goal for Thistle. MacIver is again denied by Hogarth who saves his header from Cardle's corner with Tiffoney seeing his follow up blocked by a defender near the goal line. 

Hamilton tries to catch Wright out with a long range shot but the Thistle keeper is untroubled. 

Cardle looks for a penalty when he tries to get on the end of MacIver's ball but the referee is uninterested in his protests. 

We're back underway. 

There has been a quickness to Thistle's play that perhaps wasn't in evidence on Saturday but they haven't been able to build up Shea Gordon's 6th minute goal and take just a solitary goal lead into the break. 

Just a bit of carelessness creeping into Thistle's play as we near half time. 

Mullen's corner comes to nothing as Niang shields the ball out for a goal kick at the back post. 

Buchanan's shot takes a deflection for a corner. 

Wright misjudges a long ball forward and Penrice is forced into conceding a free kick outside the box. 

The referee, rather than his assistant, signals that Rudden has strayed into an offside position. 

Thistle, and MacIver, are again close to a second goal but MacIver can't quite squeeze the ball home at the back post. 

Rudden flicks a low cross from Cardle towards goal but Hogarth is there to make an easy save. 

Bannigan pushes the ball out to Cardle on his right. Cardle's cross to the back post can't quite pick out MacIver though and play restarts with a goal kick. 

It's a worrying moment for Thistle as Tiffoney is left on the ground after a challenge near the half way lie. After some treatment though he is back on his feet and looks okay to continue. 

MacIver is denied his first Thistle goal but an excellent Hogarth save close to his right hand post after Cardle's cross picks out the head of he Thistle striker with Brownlie blasting the loose ball high over the crossbar. 

Some excellent skill from Bannigan nearly opens up the Cowdenbeath defence but no Thistle player can find the telling pass to create a clear cut opening and the move breaks down when the flag for offside goes up against MacIver. 

Cardle's corner is missed by just about everyone although MacIver's late run allows him to get his head to it at the back post but he is off balance as he stretches to reach the ball and his header doesn't trouble the goal. 

Bannigan's long ball foward is almost collected by Tiffoney but Hogarth gets there just in front of him and gets the ball to safety. 

Cardle is able to find Rudden in space down the right but Rudden rather wastes the opportunity with a cross that is both too powerful and too high. 

Thistle come forward and Williamson lifts a cross into the box that is just too high for Rudden. 

Mullen's corner is cleared by MacIver at the front post. 

Niany catches Russell just a shade late and Cowdenbeath have a free kick on the left hand side with a chance to test the Thistle defence. 

Cardle twists his way into the Cowdenbeath box but he is robbed of the ball by a Swann tackle. 

Williamson finds Gordon wide down the right but Gordon's cross drifts away from Rudden. 

Williamson heads clear Glass' corner before Niang does likewise when Glass gets the ball back. 

Penrice whips over a great cross from the left that Hogarth does well to push away from goal before Rudden can apply a finish. 

Thistle's bright start to the game is rewarded with any early goal. It's new signing Tiffoney with the assist as he bursts into the box from the left hand side and cuts the ball back to Gordon who drills a low shot into the corner of the net. 

Brownlie sends a header from a Bannigan cross wide of goal but the flag goes up for offside in any case. Thistle have started this game firmly on the front foot. 

Cowdenbeath get thins underway. Thistle will be shooting towards the John Lambie Stand in the first half. 

The search for league points is forgotten for the night as the Scottish Cup takes centre stage with Cowdenbeath providing the opposition at Firhill this evening with an away tie with Dundee United awaiting the winners. 

Ian McCall has made four changes to the side that started Saturday's 1-1 draw with Cove Rangers. 

Scott Tiffoney comes in to make his debut having joined on loan from Livingston earlier today. 

There are also starts for Joe Cardle, Zak Rudden and Ryan Williamson for a tie that will be played to a finish this evening with extra-time and penalties if required.