Yorkshire replaced Somerset at the top of the LV County Championship First Division with a thrilling 40-run victory at Taunton.

The home side began the final day on 12 without loss, needing a further 311 to win, and plunged to 54 for four with a series of ill-judged shots.

Zander de Bruyn gave them hope with his first century for the county, but despite 64 from Ian Blackwell and 41 from Craig Kieswetter they were bowled out with just 23 balls remaining in the match.

Matthew Hoggard and Tim Bresnan claimed three wickets each for Yorkshire, who took 21 points to Somerset's five.

It was poor top order batting that cost the hosts. Openers Marcus Trescothick and Neil Edwards threw away their wickets in similar style, pulling catches to David Wainwright at deep square off short-pitched balls from Bresnan.

It was 36 for three when Hoggard trapped James Hildreth lbw to for two and Justin Langer soon followed, caught at slip by Jacques Rudolph attempting to run a delivery from Steve Patterson to third man.

The scoreboard read 54 for four and Yorkshire sensed a quick kill. But Blackwell survived a sharp chance to Rudolph at slip on eight and by lunch he and de Bruyn had taken the score to 115 without further loss.

Blackwell's 54-ball half-century threatened to turn the tide but the visitors remained favourites when Hoggard had the left-hander caught behind for 64, prodding at a good length ball.

From 142 for five, de Bruyn and Kieswetter combined for a century partnership in 32 overs, the second fifty coming off 12 overs.

Just when they looked to have swung things Somerset's way, Kieswetter was pinned lbw by Patterson on the back foot for 41.

When Hoggard took the second new ball the target was down to 73 with 21 overs left in the match and he quickly bowled Ben Phillips middle stump for seven.

But de Bruyn went on to his first century for Somerset, made off 214 balls, with just five fours, and a draw looked favourite when Alfonso Thomas shut up shop while batting for 12 overs.

Adil Rashid broke through his defence with six overs left and 46 still needed.

Somerset's chance had gone. and de Bruyn's brave innings ended with a perfectly pitched leg-break from Rashid with 24 balls remaining.

Bresnan ended a memorable contest by bowling Andy Caddick off his pads, sparking wild celebrations among his colleagues.