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MatPlus.Net  Forum Competitions A construction task for you all |
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| | | (1) Posted by Hauke Reddmann [Thursday, Apr 3, 2008 14:01] | A construction task for you all
Surely one has come up with this before me, but anyway:
Construct a #2 (legal, no promoted pieces):
1. The key threatens N mates. Your task is to maximize N.
(Bonus points for decent key.)
2. Black can parry all threats with one move.
This should ideally be no check, which would ease the task.
(Bonus points for quiet move, too.)
3. White has now a different mate (obviously :-)
To my knowledge, the Fleck record still stands at 8 variants.
Here, you have no Fleck and just one Karlström, so you should
not even begin below about 15-20 variants (because such has my
old position which I can't find anymore at the moment :-)
Hauke
| | | (2) Posted by Sarah Hornecker [Thursday, Apr 3, 2008 16:06]; edited by Sarah Hornecker [08-04-03] |
 (= 6+8 )
SH, Original
Mate in 2
1. Bxe6 (threatens 2.Sd6/Qxc7/Qxd7/Bxd7 mate)
1...Bf6!? 2.Qxc7 mate
1...bxc6!? 2.Bxd7 mate
better:
1...Be5! 2.Sa7 mate!
1...Bb6! 2.Rh8 mate!
It has two variations, but only 4 mates.
| | | (3) Posted by Frank Richter [Thursday, Apr 3, 2008 18:08] |
Because we are looking for a task, the result should be something like the following:
FR, Scheme, #2
 (= 9+7 )
The ugly key 1.R:g3 gives 22 threats (14 by rook g3 and 8 by queen). After the check 1.- h:g3 only 2.B:g3# answers.
(This is my first result, I think, it is possible to add more threats).
| | | (4) Posted by Sarah Hornecker [Thursday, Apr 3, 2008 18:11] |
Wrong! It gives the threat R~ and eight by queen, so it's nine threats. There's no threat by moving the rook to a certain field, but by moving it at all.
| | | (5) Posted by Frank Richter [Thursday, Apr 3, 2008 18:47] |
Here I'm not agree. R~ isn't a real move, and we should count real moves as threats.
| | | (6) Posted by Sarah Hornecker [Thursday, Apr 3, 2008 19:35]; edited by Sarah Hornecker [08-04-03] |
Then everyone could do something like this (only that it should be the other way round but this is just as a scheme):
 (= 8+2 )
SH, Original
1.Sd6? Bxd4!
1.Rc3!
PS: Milan, please move the last three replies to a new thread since it is a little offtopic. (SH, FR, SH)
PPS: Or this.
 (= 10+3 )
SH, Original
Black to move, white mates
1...Sxd5 2.Se6 mate
| | | (7) Posted by Hauke Reddmann [Friday, Apr 4, 2008 14:45] |
I would count Franks R~ as separate (although it's not in the
"spirit" of Fleck), nevertheless, my position, which I'm still
searching :-), doesn't have any battery, but a 12 Q cross plus
assorted this&that.
Hauke
| | | (8) Posted by Hauke Reddmann [Saturday, Apr 5, 2008 15:46] |
Addendum: I had something like Qf4/Rg4/Be4/Bg3 - Kc5/Qh3,
1.Bg2! Qxg4! 2.Bf2# in mind. Complete matrix at will.
Hauke
| | | (9) Posted by Jan Hein Verduin [Monday, Apr 7, 2008 07:00] |
Well here's my (rather schematic) 2 cents:
 (= 8+5 )
... with 28 threats after 1.Sxc5.
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