I was very excited yesterday.
I got a chance to give Fritz 11 a whirl on a family member's computer. He got Fritz 11. So I grabbed one of my old games and fired up Fritz 11.
Now in this position, I let Fritz 11 do an infinite analysis on this position (see diagram on left). After letting this position run for over 3 minutes, Fritz threw up the surprising line:
Analysis by Fritz 11: 1. -+ (-1.62): 36.Rxf6 Re1 37.Rxh6 Rxe5 38.dxe5 d4 ... (see 2nd diagram on left)
..... what the... ? 36. Rxf6??
Fritz is kidding, right? No.
Even more surprising is that after the move 36. Rxf6 was played, Fritz now throws up the following evaluation (see 3rd diagram on left) after analysing for about 3 minutes...
1. -+ (-7.17): 36...Qxg3+ 37.Kxg3 Rxe6 38.Rf5 Rd6 39.Rf3 Rd1 ....
What? After taking the first move, Fritz now decides that the position has swung from a -1 evaluation to a -7!
If you look at the first evaluation in the 2nd diagram, for some strange reason, Fritz didn't analyse or see the line 36. Rxf6 Qxg3+ 37.Kxg3 Rxe6.
This is very odd.
If anyone is interested to give this a whirl, I've copied the FEN position below.
4r1k1/2q3p1/4bp1p/3pR3/3P4/5RQP/5PPK/2r5 w - - 0 36