Author: Terry McCracken
Date: 11:29:51 03/07/02
Go up one level in this thread
On March 07, 2002 at 14:18:47, Robert Hyatt wrote: >On March 07, 2002 at 12:11:12, Terry McCracken wrote: > >>On March 07, 2002 at 10:44:02, Robert Hyatt wrote: >> >>>On March 07, 2002 at 00:24:32, Terry McCracken wrote: >>> >>>>On March 06, 2002 at 23:46:44, Robert Hyatt wrote: >>>> >>>>>On March 06, 2002 at 17:26:05, Terry McCracken wrote: >>>>> >>>>>>On March 06, 2002 at 17:07:51, Robert Hyatt wrote: >>>>>> >>>>>>>On March 06, 2002 at 16:55:53, Terry McCracken wrote: >>>>>>> >>>>>>>>On March 06, 2002 at 15:59:21, Robert Hyatt wrote: >>>>>>>> >>>>>>>>>On March 06, 2002 at 13:55:14, Terry McCracken wrote: >>>>>>>>> >>>>>>>>>>On March 06, 2002 at 13:09:05, Robert Hyatt wrote: >>>>>>>>>> >>>>>>>>>>>On March 06, 2002 at 11:20:17, Terry McCracken wrote: >>>>>>>>>>> >>>>>>>>>>>>[D]8/8/8/8/8/6P1/6k1/4KR1R w >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>>Mate in 3 >>>>>>>>>>>> >>>>>>>>>>>>Terry >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>>This is a mate in 4, not a mate in 3, as confirmed by EGTBs... >>>>>>>>>> >>>>>>>>>>Dr. Hyatt with all due respect, EGTBs will _not_ help you with this type >>>>>>>>>>of problem. EGTBs look at it as an endgame where it's assumed the King and both >>>>>>>>>>Rooks have been moved. Maybe EGTBs can be adjusted for this situation? >>>>>>>>>> >>>>>>>>>>Castling is the correct solution, which forces mate in 3. >>>>>>>>>> >>>>>>>>>>BTW CM8000 in mate mode or in normal mode will find mate in 3 instantly! >>>>>>>>>> >>>>>>>>>>This problem created 145 years ago by Samuel Lloyd when he was not yet 16 years >>>>>>>>>>of age, is still considered one of the most famous problems in chess history. >>>>>>>>>> >>>>>>>>>>http://www.chessbase.com/puzzle/puzzle9/puzz9-6a.htm >>>>>>>>>> >>>>>>>>>>The solution can be found at this link. >>>>>>>>>> >>>>>>>>>>http://www.chessbase.com/puzzle/puzzle9/games/p9_6.htm >>>>>>>>>> >>>>>>>>>>Regards, >>>>>>>>>> Terry McCracken >>>>>>>>> >>>>>>>>> >>>>>>>>>Sorry, but if you check the +EPD+ posted for the position, there is _no_ >>>>>>>>>castling possible. Which means this is a simple mate in 4 and the EGTB >>>>>>>>>results are perfect. >>>>>>>> >>>>>>>>You've got to be joking!? If it's the fault of how I set the diagram, please >>>>>>>>forgive me! >>>>>>>> >>>>>>>>Forget FEN, Forget EPD and look at it as a _position only_ with the only clue >>>>>>>>Mate in 3! >>>>>>>> >>>>>>>>I'll check the rules on what is or is not needed at the end of the FEN. >>>>>>>> >>>>>>>>But really, you must have understood my intent and that this _position_ >>>>>>>>forgeting the *Rule Base* for FEN and or EPD is a mate in 3? >>>>>>> >>>>>>>Actually I didn't give it much thought, because the idea of grabbing a >>>>>>>position that is not legal never entered my mind. In the position you gave, >>>>>>>white has no castling rights by the FEN string, and white has no rook to >>>>>>>castle with either. Also it is not exactly "white to move" because white >>>>>>>has already started to make a move but has not completed it. >>>>>>> >>>>>>>Which was my point in the first place... what is the interest in grabbing >>>>>>>a position on the board at some random point in time, rather than grabbing it >>>>>>>only when one side is to move in a legal position? >>>>>>> >>>>>>>How convoluted! Please! I agree you gave it little thought, except for your >>>>>>defence! >>>>> >>>>> >>>>>I gave it all the thought it deserved. I assume _legal_ positions. I don't >>>>>care for positions with rooks "in transit" or any other such nonsense since >>>>>FEN does _not_ allow for such, and for good reason... >>>>> >>>>So? Why trample on a composition of Beauty? >>> >>>I didn't trample on _anything_. I pointed out that you had posted an >>>invalid FEN position and that was that. >>> >>Then explain how please to give the correct FEN for this position, thanks. > >The first field is the FEN string describing the 64 squares. The next field >is w or b for white-to-move or black-to-move. The next field is composed of >1-4 characters... K means white can castle kingside, Q means white can castle >queenside, k means black can castle kingside and q means black can castle >queenside. "-" means neither side can castle. The remaining to fields have >to do with the move number and number of moves since the last irreversable >move for 50 move draws... > > >Thanks Dr. Hyatt! Regards, Terry > > > >>> >>>> >>>>Look at the position for what it is. A very clever composition! >>> >>>I believe I gave you credit for something "clever". But I also pointed out >>>that it was "broken" according to the precise specification for FEN position >>>strings. >>> >>>Ok I made a note of that and gave you a reply somewhere here!:) >> >> >>> >>>>> >>>>> >>>>>> >>>>>>I was unaware of these rules with FEN when I posted....I thought maybe you would >>>>>>see my error, (In this case not knowing the FEN Rules) and understand I was >>>>>>setting up a Mate in 3 Problem and to attempt to solve it! >>>>>> >>>>>>Of course this means you would look at it as if I set it up on a *Real* board >>>>>>and said look Bob; Here's a mate in 3 White to Move, do you see it? >>>>>>> >>>>>>> >>>>>>>> >>>>>>>>Now try your EGTBs with the castling rule, thanks! >>>>>>> >>>>>>>EGTBs don't include castling because it would be a waste of time and >>>>>>>space. >>>>>>> >>>>>>>Yes I guess it would be 99.999% of the time. >>>>>>>> >>>>>>>>Terry
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