In a big setback for its efforts to claw back some of the ground it has lost to Sega Enterprises Ltd, Nintendo Co says that the launch of its new Ultra 64 video game system, planned for this year’s Christmas season, will be delayed until next April. The final chip set has now been completed by Silicon Graphics Inc and Nintendo but it plans to concentrate for this year’s holiday season on new games for its 16-bit Super Nintendo Entertainment System, and for its hand-held Gameboy device. It will also launch its Virtual Boy three-dimensional system this summer. After 19 months of intense development, we have attained our two main goals for Nintendo Ultra 64 – to develop a chip set capable of delivering the world’s best video game experience, and to do it at a price that can deliver a hardware set below $250 retail, Nintendo of America said.