Author: Robert Hyatt
Date: 11:18:47 03/07/02
Go up one level in this thread
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... >> >>> >>>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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