The victory improved Mariner's tally to 21 points from 12 matches, two adrift of third-place Mohamme-dan, while Ajax remained on their first phase collection of 11 points from the same number of outings.

The winners scored all four goals in the first half.

Pakistani Yamin Bhatti opened the floodgates in the 18th minute with a field goal. After nine minutes Pakistani Kasim Imran netted another field goal while Yousuf Ali Biswas increased the margin for the Arambagh-based outfit four minutes later.

Asaduzzaman Chandan put the result beyond doubt converting a penalty-corner in the 33rd minute.

Ajax had to wait until 62nd minute before Tutul Kumar Nag scored a consolation goal from a penalty stroke.

Today Usha Krira Chakra will go in search of a win against Moha-mmedan Sporting Club to ensure a maiden league title for them.

Anything but a victory will leave second-placed Abahani with an outside chance of lifting the title.

Leaders Usha will start the crucial match on 30 points while Aba-hani have 26 with two rounds to go.