Author: Heiner Marxen
Date: 11:49:47 03/01/05
Go up one level in this thread
On March 01, 2005 at 14:34:36, Uri Blass wrote:
>On March 01, 2005 at 14:24:44, Dann Corbit wrote:
>
>>On March 01, 2005 at 14:22:49, Uri Blass wrote:
>>
>>>On March 01, 2005 at 13:53:34, Dann Corbit wrote:
>>>
>>>>The opposite of a good test move (one best move choice) is one with lots of
>>>>equally good winning moves. I was playing around, analyzing some Orangutan
>>>>games and stumbled on this position:
>>>>[D]1Q6/8/2K5/3NQ1p1/8/8/5k2/8 w - - acn 2564; acs 0; bm Nc3 Ne3 Qb1 Qb3 Qb4 Qb5
>>>>Qbb2+ Qbh8 Qc3 Qc8 Qe3+ Qe4 Qe6 Qe7 Qee8 Qf5+ Qf8+ Qg3+ Qh2+; ce 32762; dm 3; pv
>>>>Qf5+ Kg2 Ne3+ Kg1 Qf1#;
>>>>
>>>>Which made me wonder,
>>>>In a real game, what is the most ever equally good (DTM) simultaneous best
>>>>moves?
>>>>
>>>>19 equal mates in 3 is interesting, but I wonder if there has ever been (for
>>>>example) 100 best moves leading to mate in some minimum distance.
>>>
>>>I think that it will be hard to find more than 100 legal move in games(you can
>>>construct position with more than 200 moves but if you talk about positions from
>>>real games then my experience is that even more than 80 is very rare).
>>>
>>>constructing a position with more than 19 mates in 1 is easy
>>>
>>>
>>>
>>>[D]k7/2PPPPPP/7K/2Q5/2Q5/2Q5/6R1/1R5B w - - 0 1
>>>
>>>Here is first position that I composed and I am sure it is easy to compose a
>>>better example.
>>
>>That is why I restricted the set to "real games" rather than constructed
>>problems. But that is an equally interesting alternative question.
>
>I think that the second example that I compose is better
>
>[D]1Q5B/2N1Q1R1/4N3/Q1B1k3/3RBR2/8/7Q/Q3Q1K1 w - - 0 1
>
>I can modify movei to calculate how many mates in 1 white has in a short time
>but it seems that every move of the pieces except the kings and the queens is
>indirect mate because every square near the king is protected by at least 2
>white pieces and only one can stop defending it.
>
>I am sure that there is a better example than it.
>
>
>Uri
Not bad, 57 mate in 1:
W: Kg1 Qa1 Qa5 Qb8 Qe1 Qe7 Qh2 Rd4 Rf4 Rg7 Bc5 Be4 Bh8 Nc7 Ne6 (15)
B: Ke5 (1)
FEN: 1Q5B/2N1Q1R1/4N3/Q1B1k3/3RBR2/8/7Q/Q3Q1K1 w - -
analysing (mate in 1 moves):
Solution (in 1 moves):
Ne6 - d8
Ne6 - f8
Ne6 - g5
Nc7 - a8
Nc7 - a6
Nc7 - b5
Nc7 - d5
Nc7 - e8
Be4 - f5
Be4 - g6
Be4 - h7
Be4 - d3
Be4 - c2
Be4 - b1
Be4 - f3
Be4 - g2
Be4 - h1
Be4 - d5
Be4 - c6
Be4 - b7
Be4 - a8
Bc5 - d6
Bc5 - b4
Bc5 - a3
Bc5 - b6
Bc5 - a7
Rg7 - h7
Rg7 - f7
Rg7 - g8
Rg7 - g6
Rg7 - g5
Rg7 - g4
Rg7 - g3
Rg7 - g2
Rf4 - g4
Rf4 - h4
Rf4 - f5
Rf4 - f6
Rf4 - f7
Rf4 - f8
Rf4 - f3
Rf4 - f2
Rf4 - f1
Rd4 - c4
Rd4 - b4
Rd4 - a4
Rd4 - d5
Rd4 - d6
Rd4 - d7
Rd4 - d8
Rd4 - d3
Rd4 - d2
Rd4 - d1
Qh2 - h5
Qe7 - g5
Qe7 - f6
Qe7 - d6
Cheers,
Heiner
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