Hull manager Steve Bruce saluted new signing George Boyd after his side closed the gap on leaders Cardiff with a 5-2 demolition of struggling Birmingham at the KC Stadium.
Boyd, a tricky winger signed from Peterborough last month, and Mohamed Gedo both scored twice for the Tigers, with Robert Koren also on the scoresheet as they bounced back from last weekend's 4-1 defeat at Bolton in emphatic fashion at the KC Stadium on Saturday.
Hull were two goals to the good after just 11 minutes with Boyd scoring after just 46 seconds and Gedo firing home from 12 yards.
Boyd added his second just before the half hour mark and Koren struck after the break with Gedo beating Jack Butland again in the 76th minute.
Peter Lovenkrands and Christopher Burke scored late goals for Birmingham but Hull had done enough to take advantage of third placed Watford's 1-1 draw against Wolves on Friday and move into second place.
"If there has been a better home debut, I haven't seen one for a long time. He was terrific from first to the last," Bruce said of Boyd.
"He's a good player. You can talk about tactics, formations and systems but this kid oozes ability.
"He can play with anybody. He's a clever footballer. He's made the difference today at an important time."
While Hull prospered, Malky Mackay's Cardiff saw their lead cut to five points following a 2-1 loss at Middlesbrough.
Former England midfielder Kieron Dyer's first league goal since 2007 put Middlesbrough ahead in the 13th minute before on-loan Newcastle forward Sammy Ameobi marked his debut with the second four minutes later.
Aron Gunnarsson's seventh goal of the campaign reduced the deficit in the 67th minute, but there was no way back for Cardiff.
"I felt we probably deserved a point on the basis of that second half performance," Mackay said.
"We shot ourselves in the foot a bit and we gave away two goals which we would normally never concede. But to be honest we had enough chances to get the leveller."
Leicester boss Nigel Pearson felt two "very unsavoury" incidents contributed to his fifth placed side's 1-0 defeat at Ipswich.
David McGoldrick's late winner settled a gritty and hard-fought contest at Portman Road, but Pearson was left fuming by a flashpoint just before the goal that rattled Foxes skipper Wes Morgan.
The City manager accused Michael Chopra of kicking out at him and then Daryl Murphy of elbowing him.
"We weren't at our best but still had enough chances to get something out of the game, although other off-the-ball incidents contributed to the result," said Pearson.
"All you have to do is take a look at them. I'm not a sour grapes person."
Leonardo Ulloa hit a hat-trick as Brighton continued their promotion push with a 4-1 win over Huddersfield.
Blackburn were blown away by a first-half Dwight Gayle hat-trick before Peterborough withstood a second-half fightback to climb off the bottom of the table with a 3-2 win at Ewood Park.
Elsewhere, Burnley beat Charlton 1-0, Leeds defeated Millwall 1-0 and Nottingham Forest won 1-0 at Sheffield Wednesday.
Bolton won 3-2 at Barnsley and Blackpool drew 0-0 against Bristol City.