"zyoda" 8d shows us a New Move!
Black: zyoda 8d (Michael Zhaonian Chen)
White: gowithwi 9d (Dongfang Li)
23 (Black R5) is a brand new move!
normal move would be Black P2 instead (followed by White S2 atari, Black Q1 capture, White R7
extension). Black S2 (instead of R5 in the game) is also possible.
result in the actual game looks acceptable for Black: some thickness + sente.
the game I asked gowithwi 9d for his thoughts on R5, and he said that he had never seen it before.
the game file you can find some variations shown by gowithwi afterwards. He admits that he doesn't know whether R5 is
good or not.
it is certainly an interesting idea!
The result of the ko in the upper
right corner and the subsequent furikawari was too good for White...
Just as the game was over I also asked gowithwi what
he thought of Chen's level, and he said that zyoda was maybe a little bit scared. :)