Crafty refusing to analyze a position?

[matthewlai]

It seems like Crafty really doesn't want to analyze this position -
[fen]setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1[/fen]

I am doing

Code: Select all

xboard
protover 2
setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1
post
analyze

And Crafty 24.0 just sits there. No output at all, and not using any CPU.

The same command sequence works if I use the FEN for the start position instead.

What am I doing wrong?

Thanks

[Dirt]

[d]2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1

[matthewlai]

Thanks!

[michiguel]

It seems like Crafty really doesn't want to analyze this position -
[fen]setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1[/fen]

I am doing

Code: Select all

xboard
protover 2
setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1
post
analyze

And Crafty 24.0 just sits there. No output at all, and not using any CPU.

The same command sequence works if I use the FEN for the start position instead.

What am I doing wrong?

Thanks

Wild guess: it is mate in two, and maybe, Crafty does not show the first N plies of the search in some sort of a quiet mode. Some engines don't. I think Crafty has a parameter for it. Does it show anything if you type

force
sd 4
go

after setboard?

Miguel

[Ferdy]

type noise 0

[matthewlai]

It seems like Crafty really doesn't want to analyze this position -
[fen]setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1[/fen]

I am doing

Code: Select all

xboard
protover 2
setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1
post
analyze

And Crafty 24.0 just sits there. No output at all, and not using any CPU.

The same command sequence works if I use the FEN for the start position instead.

What am I doing wrong?

Thanks

Wild guess: it is mate in two, and maybe, Crafty does not show the first N plies of the search in some sort of a quiet mode. Some engines don't. I think Crafty has a parameter for it. Does it show anything if you type

force
sd 4
go

after setboard?

Miguel

Yes, it moves immediately with Qg6.

It does sound likely that it just doesn't output anything for the first N plies. The behaviour seems wrong in analyze mode though, where it just doesn't output anything.

[matthewlai]

type noise 0

That worked. Thanks!

[bob]

It seems like Crafty really doesn't want to analyze this position -
[fen]setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1[/fen]

I am doing

Code: Select all

xboard
protover 2
setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1
post
analyze

And Crafty 24.0 just sits there. No output at all, and not using any CPU.

The same command sequence works if I use the FEN for the start position instead.

What am I doing wrong?

Thanks

That looks like a gui bug. It is a mate in 2, that takes 0 seconds of time. You might try "noise 0" in your crafty.rc file... Version 24.1 actually has a fix for that problem, in that it will always show the last pv it searched, regardless of how noise is set.

[matthewlai]

It seems like Crafty really doesn't want to analyze this position -
[fen]setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1[/fen]

I am doing

Code: Select all

xboard
protover 2
setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1
post
analyze

And Crafty 24.0 just sits there. No output at all, and not using any CPU.

The same command sequence works if I use the FEN for the start position instead.

What am I doing wrong?

Thanks

That looks like a gui bug. It is a mate in 2, that takes 0 seconds of time. You might try "noise 0" in your crafty.rc file... Version 24.1 actually has a fix for that problem, in that it will always show the last pv it searched, regardless of how noise is set.

Eh? Why is this a GUI bug? What is GUI supposed to do? "noise" is not in the xboard protocol.

I am not using a GUI. I'm just typing those commands directly.

And thanks, I'll upgrade to 24.1 once it's released.

[bob]

It seems like Crafty really doesn't want to analyze this position -
[fen]setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1[/fen]

I am doing

Code: Select all

xboard
protover 2
setboard 2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1
post
analyze

And Crafty 24.0 just sits there. No output at all, and not using any CPU.

The same command sequence works if I use the FEN for the start position instead.

What am I doing wrong?

Thanks

That looks like a gui bug. It is a mate in 2, that takes 0 seconds of time. You might try "noise 0" in your crafty.rc file... Version 24.1 actually has a fix for that problem, in that it will always show the last pv it searched, regardless of how noise is set.

Eh? Why is this a GUI bug? What is GUI supposed to do? "noise" is not in the xboard protocol.

I am not using a GUI. I'm just typing those commands directly.

And thanks, I'll upgrade to 24.1 once it's released.

I should have deleted that. I have seen cases, however, where Crafty made a "choice" too quickly and the GUI would fail to display the output. But in this case it is the "noise" feature. 24.1 solves this completely as it will ALWAYS show the last PV output before ending the search and waiting for input.