Deep Blue wouldn't stand a chance.
That's somewhat questionable. Deep blue was a computer that contained only 15 million transistors. Today's home computers have billions of transistors, thanks to the progression of Moore's Law. Blue Gene can do much more work than deep blue, being a super computer designed to do one petaflop (or one quadrillion) floating operations per second. Deep Blue could only preform one trillion floating operations per second, much less than Blue Gene. But here's a problem; as much computing power as blue gene has in comparison to deep blue, Blue Gene is not designed to play chess. And once you get a computer to analyze 200 million positions per second (averagely), and analyze rational possibilities for 6-20 future moves? You've pretty much beaten every human on the planet indefinitely. Yes, there are many possible chess games out there, but it's likely that each computer will choose the correct scenario considering they can see so far ahead. And deep blue was specifically made to use ALL computing power to play chess. Chess software only uses a fraction. I'm betting it's more likely that deep blue would end in a stalemate with whatever it faced. Too a computer that can see so far ahead, and has analyzed 700,000 grandmaster games? Chess to it becomes more like Tic-Tac-Toe rather than the complex game it is to us humans. While there are tricks around chess software, deep blue was built to be more of a free thinker out of parameters. Unfortunately, it has been disassembled, so there really isn't any testing to prove my statements.
15 years of hardware improvements (= enormosly much!) plus gigant steps in the algorithms for evauating positions.
Just look how Houdini is turing old TOP engines (like Fritz 6) into pieces. Fritz doesn't stand a chance.
Of course, Houdnini would probably win by a large margin.
(What ever happened to Hydra, btw; poor M.Adams ... )