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MatPlus.Net Forum Promenade White Super-AUW with orthodox material

### White Super-AUW with orthodox material

Josef Krejcik created the following brilliancy:

(= 13+6 )

Selfmate in 16

1.e8K!! Kf5 2.d8S! Kg6 3.h8B! Kf5 4.b8S! Kg6 5.a8R! Kf5 6.f8P!! Kg6 7.Sf7 Kf5 8.c8Q+ Kg6 9.Qg5+ Kh7 10.Qg1 Kg8 11.Qcg4 Kh7 12.Sd7 Kg8 13.Rd8 Kh7 14.Qh1+ Kg8 15.Sxe5 Rxe5+ 16.Qe6+ Rxe6 mate

Can this be shown without duals?

The problem is, unfortunately, orthodoxly cooked as noted in P1244385: 1. d8=N+ Kf5 2. Kd7 Kg6 3. h8=B Kf5 4. Kc8 Kg6 5. f8=B Kf5 6. g8=B Kg6 7. Nf7 Kf5 8. Qh7+ Ke6 9. N7xe5+ Kd6 10. B8h6 Rxe5 11. e8=N+ Rxe8#

If the goal is to do a Super-AUW with orthodox material, but not necessarily legal position, I offer the following scheme.

s#10
(= 13+11 )

Solution (?): 1. gxh8=R+ Kg7 2. f8=B+ Kf6+ 3. e8=N+ Ke6 4. d8=P+ Kd5 5. cxb8=K Kc6 6. a8=Q+ Kb6 7. Ra4 e4 8. Ne5/7 (minor dual) e3 9. Rxa3 Qxa3 10. Qa7+ Qxa7#

This is for sure cooked or dualed in some way, but it is a start nonetheless.

The only other Super-AUW with orthodox material I know of is a Rex Multiplex problem, which is at P1322528.

Gustav Joachim Sontag, Feenschach 12/1982
h=6
(= 9+14 )

Your scheme is cooked with promotions RRRQQK:

1.gxh8=R+ Kg7 2.cxb8=K Kf6 3.f8=Q+ Ke6 4.a8=Q Kd6 5.d8=R+ Kc5 6.e8=R+ Kb6 7.Ra4 e4 8.Ne5 e3 9.Rxa3 Qxa3 10.Qa7+ Qxa7#

This is just one of the 63 solutions found with the following Jacobi input:

EnglishN
forsyth 1bB4r/P1PPPPPk/6NN/4p2P/4R3/pp6/qrp1Q3/rbB5
stip u#10
cond SiameseKings PromOnly P S B R Q K
test dia forsyth 1XBXXX1X/q7/1k5N/4N2P/8/1p2p3/1rp1Q3/rbB5

This is a *partial* test, where the stipulation u#10 is testing for a s#10 where black has a unique legal move at each step, and where the last line is enforcing the intended final position (but leaving the choice of promotion free with X). Maybe this test can help you compose a problem that is more likely to be sound?

Thanks Francois. That will be very useful to me. There is actually a cook in 8: 1. gxh8=R+ Kg7 2. cxb8=K Kf6 3. f8=Q+ Ke6 4. a8=Q Kd6 5. d8=R+ Kc5 6. e8=Q/B+! Kb6 7. Qfxa3 Qxa3 8. Qa7+ Qxa7+#

Coming back to this, I’ve managed what is no doubt a correct 5/6 Super-AUW. A s#7 version with a bishop promotion is possible as well: 4nR2/PP1P1PkP/5NBp/1P2PP2/8/7N/6p1/6Bb

s#6
(= 11+5 )

Sol: 1. h8=Q+ Ke7 2. dxe8=R+ Kd7 3. f8=N+ Kc7 4. a8=K h5 5. b8=P h4 6. Ba7 g1=~#

Does this Super-AUW work? It likely doesn’t.

s#9
(= 12+10 )

Sol: 1. bxa8=Q+ Kb6 2. cxb8=R+ Kc7 3. d8=B+ Kd6 4. e8=N+ Ke6 5. Bxd5+ Kf5 6. fxg8=P Kg6 7. h8=K Kf5 8. Nd6+ Kg6 9. Rxh3 Rxh3#

I can't see any obvious cooks. If you had wK already on the board, so then the victory condition was checkmate one king to win, well it would be cooked because there of fxg8=K! So best you have it the way it is with no wK on the board at the beginning

Frank, if 1. axb8=R+?, then 5. Bxd5+ Kxd5!

Does something like this work?
1. bax8=Q+ Kb6 2. cxb8=R+ Kc7 3. fxg8=R Kd6
4. e8=Q Kc7 5. h8=K Kd6 6. g6 Kc7 7. g7 Kd6
8. Qf8+ Kc7/Ke6 9. Rxh3 Rxh3#

Okay, I see ... I need new glasses or at least playable diagrams here ...

The position after 1.bxa8=Q+ Kb6 2.cxb8=R+ Kc7 3.hxg8K! Kd6 gives an orthodox s#5 with 6 solutions according to Gustav, f.ex. 4.d8=N Kc7 5.Kh8 Kd6 6.e8=N+ Ke7 7.Qa7,b7+ Kf8 8.R:h3 R:h3# or even 4.Kh7 Kc7 5.Bc2 Kd6 6.d8=Q+ Ke6 7.e8=R,f8=N K(x)f7 8.R:h3 R:h3#

Many thanks for the manual/computer testing, Frank and Andrew. The task must be made more “forcingly” then. Since less moves means less possible cooks, I found two 7-mover Super-AUWs. The first one is much more likely to be sound.

s#7
(= 12+9 )

Sol: 1. bxa8=Q+ (=R+? 5... Kxd5!) Kb6 2. cxb8=R+ Kc7 3. d8=L+ Kd6 4. e8=N+ Ke6 5. d5+ Kf5 6. fxg8=P+ Kg6 7. gxh8=K Bg7#,Bxf8#.

s#7
(= 12+9 )

1. bxa8=R+ Kb7 2. c8=B+ Kc6 3. d8=N+ Kd6 4. exf8=Q+ Ke5 5. Nc6+ Kf6 6. fxg8=P+ Kg6 7. gxh8=K Bg7#,Bxf8#

This matrix is my most fruitful yet. The limiting dummy pawn is the true difficulty,

UPDATE: I’ve managed a Super-AUW in 6 moves-the minimum number of moves possible. It was very difficult to pull off.

s#6
(= 13+10 )

Sol: 1. c8=B+ Kc6 2. axb8=N+ Kd6 3. exf8=Q+ Kxe6 4. dxe8=R+ Kf6 5. fxg8=P+ Kg6 6. h8=K Bxf8#,Bg7#

The shorter the representation, the greater the probability of soundness.

Some little typos:
1. c8=B+ Kc6 2. axb8=N+ Kd6 3. exf8=Q+ Kxe6 4. dxe*8*=R+ Kf6 5. fxg8=P+ Kg6 6. gxh8=K Bxf*8*#,Bg7#

How about 5. fxg8=R+ Kg6 6. gxh8=K+ Bg7# though?

Can one shift wPg7 to h7 in the start position, and remove bRh8?

What does Gustav say?

Thanks for finding those types-fixed.

QUOTE

Can one shift wPg7 to h7 in the start position, and remove bRh8?

No, because after fxg8=P, black can play Bh6xf8.

Well ... even if this is super-sound, it is at least super-ugly and very far from chess composition as an ART FORM.

(18) Posted by Andrew Buchanan [Thursday, May 21, 2020 08:00]; edited by Andrew Buchanan [20-05-21]

John Nunn wrote in his forward to Jeremy Morse's "Chess Problems: Tasks and Records"

"Most chess composition is first and foremost about achieving an artistic effect. [..] By contrast, in task or record problems the artistic element is secondary. The main point is to achieve a particular extreme effect and the means are subordinate to the end."

Morse explores this point in greater detail. Let me pick a soundbite from section 1.21:

"Some problemists are not interested in tasks and records unless they are also 'good chess'. They stress the aesthetic; [T.R.]Dawson stresses the mathematical; and [Alain ] White tries to balance the two."

A task composer is not necessarily "un-artistic", but the challenge they have set themselves can be so hard, that it would be a mistake for them to focus prematurely on the inessential. Once a successful matrix has been identified, then it's possible to explore round from that point, see how big a design space has in fact been stumbled upon, and decide if it's possible to refine what they have achieved to introduce other secondary ideas.

I think this dimension of difference enriches our culture. "We are all independent spirits" and (particularly for relative newcomers) do not merit scorn.