Massive turn-around in the endgame -- Rybka now evals at -1.25 (as does Houdini), as it looks like Black has the chances with RRB+3 vs RR+6. One question here is whether the engines understand that (for instance) RB vs RPP is "dominated" by RB vs R, in that if the RB-side can't win with the pawns off, there is no win. Maybe even RRB vs RR (+pawns). There's also a few lines that lead to White having 4 (or 5) pawns for a Rook. All quite delicate.
