BRUSSELS, Oct 18 (Reuters) - Anderlecht erased the memories of their 4-0 humiliation by Dynamo Kiev three weeks ago, crushing the Ukrainians 4-2 in their Champions League Group G clash on Wednesday with a stunning first half display.

A goal down inside a minute after some sloppy defending gifted Kiev an easy goal from a corner which Kakha Kaladze converted, the Belgians stormed back with four goals in the first half in a performance that surprised even their most optimistic fans.

The result the performance were a cause of major satisfaction for Anderlecht coach Aime Anthuenis, who has come in for much criticism in recent weeks.

'I think the first 45 minutes was perhaps the best performance we've seen from Anderlecht not just this season, but for the past few years,' Anthuenis said.

'I've always said it's important that we get Champions League points, but it's just as important how we get them. I think we've done well on both counts.'

After going behind, the Belgians stormed straight back, peppering the Kiev goal with chance after chance.

Even before Vladyslav Vaschuk deflected the ball past his own keeper after 10 minutes, Anderlecht had looked dangerous and could easily have doubled their final tally.

Tomasz Radzinski was a constant threat with his blistering pace and the much-maligned Alin Stoica finally found the confidence in central midfield to set up a number of dangerous attacks.

Justice was served when Radzinski headed in a low cross from Bertrand Crasson after 37 minutes and followed that four minutes later with a second goal from close in after an Anderlecht free kick had been charged down.

Stoica scored the fourth on the stroke of halftime after a superb solo run down the left wing from Bart Goor and a deft inside pass from giant Czech striker Jan Koller, whose strength gave the Ukrainians futher trouble.

Kiev, who travelled to Brussels confident of victory, had careless defending to blame for the margin of their defeat, but also met Anderlecht at the height of their powers, spurred on by an unusually noisy home crowd.

After the fireworks of the first period, the second half was the inevitable anti-climax.

Anderlecht were happy to play the ball around and preserve their advantage, while Kiev lacked the heart to mount a serious counter-attack.

Radzinski came close on a couple of occasions to what have been a well-deserved hattrick, but as Anderlecht's defence slumbered Andrii Husin blasted a long-range effort just over the bar before Valentin Bialkevich scored a consolation goal two minutes from time.

With an unexpected six points from their four games, Anderlecht are starting to believe they could get to the next stage of the competition. Next Tuesday is the crunch game in Brussels against Manchester United.

Asked what his team's chances were against the group favourites who humbled them 5-1 in Manchester, Anthuenis was realsitic.

'I'd say it's 20 percent for us and 80 percent for them.'