White resigned on move 47, but play continued for testing purposes.
The Citrine will output "Mate In N" messages on its LCD display unit, but these aren't sent over the serial link to a controlling computer.
The nodes/second display was observed to have values in the 3,000 Hz to 12,000 Hz range with a middlegame average of about 4,500 Hz.
The pieces do not have to be physically moved during autoplay. However, if a cat happens to knock over a few, then the pieces must not be set up again in the starting array as this will cause the autoplay to be canceled and the game memory to be reset.
The nodes/second display was observed to have values in the 3,000 Hz to 12,000 Hz range with a middlegame average of about 4,500 Hz.
are you sure about the 12000 nps figure?
i have played tons of games against the Le Citrine(either myself or against other dedicateds) and have never seen a count that high even in endgames with only K and pawns on the board
your 4500 NPS figure is quite accurate though
i wonder if this could somehow be a result of your interfacing with a PC?
i never do that of course so i guess its possible??
sje wrote:
Yes, up to 12,000. I have seen figures of 11,000+ in simple endgames.
Try:
[D]4k3/8/8/4p3/4p3/8/8/4K3 w - - 0 1
Which in Novag-speak is: "Pcke1bpe4pe5ke8+".
Set the level to AN8 (16 ply, square e8) and watch the NPS display.
ok will verify your result soon
right now i have my latest acquisition occupying the very valuable real estate on my desk and i am close to a brilliant mate resulting from a "Tal "Like Sacrificial attack
Another position, the famed "computers will never solve this endgame from Fine's BCE":
[D]8/k7/3p4/p2P1p2/P2P1P2/8/8/K7 w - - 0 1
Which to the Citrine via the serial link is: Pcka1pa4pd4pf4pd5bpa5pf5pd6ka7+
The Citrine reports NPS numbers in the 8 KHz range. However, after completing its "infinite" level (actually, only 16 ply), the Citrine gets the wrong answer (1. Kb2 instead of 1. Kb1) and so only draws.
I remember the old Super Constellation that I seem to recall had a rather deeper 24 ply search limit. I would set up an endgame position and let it run all weekend without having it terminate its search due to a depth limit.
ok i can verify your results
Le Citrine zoomed right to 13 ply and was smokin 11500+ NPS at the analysis level
I also tested it on another level (30 SEC/MOVE) just to be certain with the same results
it is a bit of a pain having to first set up all of the pieces and then remove them one by one by hand in order to set up a position
there really needs to be a "clear board" function for position setups
Btw.. I happen to be a proud owner of one of those enlongated cables for the Display unit which i of course thank Sir Bryan Whitby for
Steve B wrote:it is a bit of a pain having to first set up all of the pieces and then remove them one by one by hand in order to set up a position
there really needs to be a "clear board" function for position setups
Btw.. I happen to be a proud owner of one of those enlongated cables for the Display unit which i of course thank Sir Bryan Whitby for
Yes, the Citrine manual interface has a few quirks. But with the serial link, position set up is easy.
Without using a serial link, I suppose one could construct a physical template of 32 small magnets glued to some stiff poster board that could immediately force the Citrine to a "new game" state.
One nice touch with the Citrine: with manual play, after the machine moves just pick up its king and put it back down on the same square; this tells the machine to switch sides.
Back in the mid 1980s, the Super Constellation was reported to be the first dedicated chess computer to be able to handle the KBNK endgame and to do this at five seconds per move. Back then, this was quite an accomplishment.
Here's how the Citrine, SC's descendant, does the job:
[D]4k3/8/8/8/8/8/8/2B1K1N1 w - - 0 1
Steve B wrote:
Btw.. I happen to be a proud owner of one of those enlongated cables for the Display unit which i of course thank Sir Bryan Whitby for
Steve
Hi,
Could you please give details on this cable ? Is it something home made or bought somewhere ?
Pascal Georges
Entirely home made by member here Bryan Whitby as far as i know
you might want to PM him to find out how to make one
Sir Bryan (as we collectors call him) makes a hobby out of improving chess computers cosmetically
his latest garden shed creation: http://www.talkchess.com/forum/viewtopi ... 10&t=23844
