New Delhi:Showcasing her talents in Rapid chess, Woman Grandmaster Kateryna Lahno marched way ahead of World's youngest GM Parimarjan Negi. She scored three straight wins in the Amity Grandmasters Challenge in New Delhi on Saturday. As a result, the Ukrainian leads Negi 6.5-2.5 at the half-way stage of this 18-games match. She needs just three points from the remaining nine games to win the Rs three lakh winner's purse. The Indian will now have to focus hard if he has to retain any hopes of winning the title. It was the first rapid game that had a big say in the subsequent events. In this Guicco Piano game, Negi had Kateryna in all sorts of troubles, and had a good advantage coming into the middle game. However, a series of erroneous moves, along with some good counter-attack by the Ukrainian, turned the tide as Kateryna turned an inferior position into a full point after 65 moves. The second game of the day saw Negi going for a wrong early plan leading to a much worse endgame. The Spanish opening has been the flavour of this match and Kateryna yet again used a familiar set-up that eventually came good. Negi resigned when he could no longer match menacing black pawns. The game lasted 49 moves. The ninth game of the match also fell the Ukrainian's way as Kateryna used her positional acumen to come out on top. The fourth victory by Kateryna was the easiest so far in the match with Negi admitting he was not able to put up much of a resistance.