EPD file fun for humans but very easy for engines

[MikeGL]

http://download1324.mediafire.com/4oh78 ... tudies.epd

This is a 566kb EPD file containing tough studies. Best moves are very easy
for engines but the puzzle is fun and difficult for humans. No best move supplied in EPD for each
position, because solutions can be easily spotted by most strong engines. Haven't
checked all puzzles if there are tough ones for engines.

Some puzzles have cooked solutions, which spoils the fun.
Source and composer of puzzles were intentionally omitted to reduce file size.

[MikeGL]

How many minutes until top engines can give a
0.00 score for position 13,475 on above epd?

[d]rr6/2K5/8/P7/8/R7/RPPPP2k/8 b - - 0 1
Looks like this is a perpetual check even with 5 pawns up for white.
SF9 gives a +6 advantage for white, but looks drawish if black won't capture a single pawn.

[MikeB]

How many minutes until top engines can give a
0.00 score for position 13,475 on above epd?

[d]rr6/2K5/8/P7/8/R7/RPPPP2k/8 b - - 0 1
Looks like this is a perpetual check even with 5 pawns up for white.
SF9 gives a +6 advantage for white, but looks drawish if black won't capture a single pawn.

I don't see it. Would you care to play this out? I'll take white, you play black.

[MikeGL]

How many minutes until top engines can give a
0.00 score for position 13,475 on above epd?

[d]rr6/2K5/8/P7/8/R7/RPPPP2k/8 b - - 0 1
Looks like this is a perpetual check even with 5 pawns up for white.
SF9 gives a +6 advantage for white, but looks drawish if black won't capture a single pawn.

I don't see it. Would you care to play this out? I'll take white, you play black.

My apologies, before posting that position I tried to calculate it without using engine. I thought it was a perpetual, but theres a win after this position:
[d]1r3r2/8/8/P7/K7/R7/RPPPP2k/8 b - - 0 1
there's Ra2 x-ray for Kh2, after Rf4+ e4 Rxe4+ d4 Rxd4+ c4 Rxc4+ b4+ is a check. at first, i thought Ka4 hole is not possible because of mate.
So a4 is a good foxhole for whites king without getting checkmated.

I only found out after your hint that there's a win, and checked the source from my dusty backups.
[Date "1978"]
[White "Composer: Valeri Khortov"]
[Result "1-0"]