Dedicated test position
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Dedicated test position
[fen]8/8/8/8/3N4/K5N1/1rp1R2p/3k4 w - - 0 1[/fen]
This is a good test of dedicated chess computers ability to spot zugzwang late in the search. My own budget Novak and Mephistopheles brands want to play 1.Rxh2 which leads to a draw. Can any dedicated comps find the key move 1.Ne4!!
This is a good test of dedicated chess computers ability to spot zugzwang late in the search. My own budget Novak and Mephistopheles brands want to play 1.Rxh2 which leads to a draw. Can any dedicated comps find the key move 1.Ne4!!
Cubeman wrote:Well kudos to Mephisto Master for finding 1.Ne4 but it is not a mate in 4 but should be saying Mate in 6
I must have double pressed 'enter' button.
I reset the position... now the Master is stumped. It did, however, announce
a mate in four. Can old chess computers have senior moments?
L
Just wonder if you had the board set up right, remember black pawns are 1 square away from promotingLarry wrote:Cubeman wrote:Well kudos to Mephisto Master for finding 1.Ne4 but it is not a mate in 4 but should be saying Mate in 6
I must have double pressed 'enter' button.
I reset the position... now the Master is stumped. It did, however, announce
a mate in four. Can old chess computers have senior moments?
L
Okay something weird is happening if computers are making Mate in 4 announcement. The main line runs 1.Ne4 Rb3+ 2.Kxb3 c1=N+ 3.Kb2 Nxe2 4.Nf3 h1=N 5.Kb1 Ng3 6.Nf2#
I wonder if the computers that are making the false mate in 4 claim understand underpromotion. The position after 5.Kb1 is rather cute as both sides have KNN but black is forced to move which allows the mate. I have tested the position on high-end PC programs like Hiarcs, Stockfish, Komodo and all confirm that it is Mate in 6.
I wonder if the computers that are making the false mate in 4 claim understand underpromotion. The position after 5.Kb1 is rather cute as both sides have KNN but black is forced to move which allows the mate. I have tested the position on high-end PC programs like Hiarcs, Stockfish, Komodo and all confirm that it is Mate in 6.
- spacious_mind
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Who knows perhaps they don't count the move just played plus the last move.Cubeman wrote:Okay something weird is happening if computers are making Mate in 4 announcement. The main line runs 1.Ne4 Rb3+ 2.Kxb3 c1=N+ 3.Kb2 Nxe2 4.Nf3 h1=N 5.Kb1 Ng3 6.Nf2#
I wonder if the computers that are making the false mate in 4 claim understand underpromotion. The position after 5.Kb1 is rather cute as both sides have KNN but black is forced to move which allows the mate. I have tested the position on high-end PC programs like Hiarcs, Stockfish, Komodo and all confirm that it is Mate in 6.
Nick
- Scally
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Hi all,Cubeman wrote:Thanks I thought the Lang programs would find it with correct announcement. I feel that the King program from Tasc or RISC 2500 would be very fast.
I have a Tasc R30 on route (will try on arrival), plus I need to get my Berlin 68000 out for the weekend so will try both the Berlin & London 68000 tomorrow.
Cheers,
Al.