End Game.....Mate in 19....?

[rightrook]

[d]2k5/8/1pP1K3/1P6/8/8/8/8 w - - 0 1

This was an "end game study" published in one of the old
"Computer Chess Reports" that they mailed out years ago....

any engine today ann. a mate in 19 at move one.....c7....?

Just wondering...

regards
Rob

[zullil]

Both Crafty-23.2 (with endgame tables) and Stockfish-1.6.3 (without tables) say mate in 21 starting with c7.

[rightrook]

Thanks Louis...

Wow..that's pretty good...!

[rlsuth]

It's easy to look up the definitive result at http://www.shredderchess.com/online-che ... abase.html

White wins in 21.

[David Dahlem]

Spark 0.3a: (without tablebases)

36/49 00:10 33.661.961 3.191.614 +M21 c6c7 Kc8xc7 Ke6e7 Kc7b8 Ke7d6 Kb8b7 Kd6d7 Kb7b8 Kd7c6 Kb8a7 Kc6c7 Ka7a8 Kc7xb6 Ka8b8 Kb6a6 Kb8c7 b5b6+ Kc7c8 Ka6a7 Kc8d7 b6b7 Kd7e6 Ka7b6 Ke6e5 Kb6c5 Ke5f4 b7b8Q+ Kf4e4 Qb8g3 Ke4f5 Kc5d5 Kf5f6 Qg3f4+ Kf6g7 Qf4g5+ Kg7h7 Kd5e5 Kh7h8 Ke5f6 Kh8h7 Qg5g7+

[Steve Maughan]

Robert,

This is, for me, an all-time classic position. I first came across it when the Fidelity Mach 3 was released in circa 1989, when the position was used in it's advertising. At the time Mach 3 only found the key move c7 and not the mate. Like Fine 71, this position is really a test of hash table implementation (I think the Mach 3 was the first Sprachlen machine to use hash tables). Over the years I've used it to test many engines and I believe Glaurung was the first engine to announce a mate in reasonable time without table-bases.

Cheers,

Steve