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| (21) Posted by James Malcom [Tuesday, Nov 10, 2020 00:31] |
Those are irrelevant in this case, Jacques-refer to Haueke's problems as well. This is the task of White choosing where the Black king goes-in the dual free cases we are exploring all squares must be covered of course
But with mine empty squares are needless to bring up in this little niche-in this case-of giving all available mates to a single piece.
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| (22) Posted by Jacques Rotenberg [Tuesday, Nov 10, 2020 01:22] |
sorry, at least not at all what I intend to do.
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| (23) Posted by Sarah Hornecker [Tuesday, Nov 10, 2020 06:52] |
If fairy pieces are allowed, the task is easy.
 (= 2+1 )
Ubi a1
Mate in 1
SH, original
1.U:b3 mate
60 squaares (all except a1, b3, c2, d3)
Not: 1.c:b3+ K:a1!
(an Ubi essentially is a fairy piece that can moves as if it could make any number of consecutive knight moves, but it can't move on after a capture)
with wK
 (= 2+2 )
Ubi a1
Mate in 1
SH, original
1.U:b3 mate
57 squares
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| (24) Posted by Jacques Rotenberg [Tuesday, Nov 10, 2020 09:35] |
anticipated
https://matplus.net/start.php?px=1604858389&app=forum&act=posts&fid=xshowm&tid=595
(16) to (22)
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| (25) Posted by Hauke Reddmann [Tuesday, Nov 10, 2020 10:02] |
@Jacques: These are simply two different tasks (mate sK on
each legal field/mate on choses fields) and it surely make
sense to start with the latter anyway, since it is easier.
With the gained knowledge, one can start then with the former.
@Siegfried: See "other" thread linked here by Rewan ;-)
@Rewan: Good job. Here is a sketch with promoted material
that might be reduced to beat 8:
 (= 10+15 )
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| (26) Posted by Jacques Rotenberg [Tuesday, Nov 10, 2020 15:13] |
btw it seems easy to bring this to 11...
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| (27) Posted by Hauke Reddmann [Tuesday, Nov 10, 2020 18:13] |
Correct, Jacques :-) I also added a few superfluous figures
such that the bK can only stand on these 11 fields.
 (= 11+21 )
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| (28) Posted by Jacques Rotenberg [Tuesday, Nov 10, 2020 19:27] |
nice ! seems a maximum with one rook
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| (29) Posted by Hauke Reddmann [Tuesday, Nov 10, 2020 20:21] |
Now the King. Cf. my sensational :-) Problem-Forum #521 with some
elaborate dual-avoidance trickery, so the following is
just a first obvious try with 4 batteries, more might
be possible. Again, some "filler" for Jacques :-)
 (= 10+9 )
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| (30) Posted by James Malcom [Tuesday, Nov 10, 2020 21:58] |
For a bishop, at least 8 can be done. For Jacques, once more as well, all non-BK squares are filled in. :)
 (= 12+17 )
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| (31) Posted by Hauke Reddmann [Wednesday, Nov 11, 2020 00:06] |
Rewan, you are guilty that I don't get any sleep tonight :-)
(And I'm too tired to check it thoroughly. In any case, 10 still might be possible.)
 (= 12+18 )
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| (32) Posted by Jacques Rotenberg [Wednesday, Nov 11, 2020 03:17] |
5 for king
 (= 13+3 )
Kg8 : Kb5#
Kf7 : Kd3#
Ke6 : Kd4#
Ke2 : Kd5#
Kf1 : Kb3#
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| (33) Posted by Hauke Reddmann [Wednesday, Nov 11, 2020 09:16] |
I *knew* it :-) (But there are mating duals with the BB. One is easily eliminated
with Ba8->b7,+sBa8, but alas, the board is too small for the other :-( (On a 9*9,
obviously 6 K # are possible with the same idea, so let's go all the way...)
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| (34) Posted by Hauke Reddmann [Wednesday, Nov 11, 2020 23:57] |
 (= 5+19 )
Knew I still could up the ante a bit - and I get no sleep again :-) 13 Q# (no filler)
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| (35) Posted by Jacques Rotenberg [Thursday, Nov 12, 2020 07:27] |
wonderful Hauke !! and so light!,
A big step !
Anyhow, the fact there is no solution with the king on a4 or d1 is a problem
5 for the king :
 (= 11+5 )
1#
b)e1->f3
c)e1->e5
d)e1->f6
e)e1->g7
a)
1.Kc2‡!
b)
1.Kb4‡!
c)
1.Kd3‡!
d)
1.Kd2‡!
e)
1.Kc4‡!
anyhow, here also, the fact there is no mate if the black king is on d1 is a problem (for the other empty squares it is easy to find something to do)
it is all the difference between a succession of twins and a short sentence " wherever the black king is he is mated in one"
In fact, if you refer to the title of this thread "- without being on the board -" you can see easily that if you need to show the places he is, there is something "wrong"
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| (36) Posted by Hauke Reddmann [Thursday, Nov 12, 2020 10:12] |
Good work, Jacques, I already had a hunch the horizontal battery
could be utilized.
As I already said, I simply count the distinction "valid even
in Kriegsspiel" and "just a construction" as two different tasks,
the former earning a bit more mojo :-) Feel free to edit my
position even if it might cost one or two mates.
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| (37) Posted by Hauke Reddmann [Thursday, Nov 19, 2020 10:10] |
Update:
https://www.schachfeld.de/threads/36849-konstruktion-matt-in-1-auf-n-feldern?p=602189#post602189
Here are two improved (for Jacques' needs :-) version of S8 and P6 by "Gelegenheitspatzer".
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