18 November 2011

More animals

The fairy pieces I introduce today are less known and not so often used. One reason might be that they are not so flexible and effective on a regular 8x8 board. To exploit their full potential, bigger boards are required. Again, they belong to the family of the leapers: dromedary, antelope, ibis, and flamingo.

Especially the dromedary is quite restricted in its mobility. Compare the following diagrams. On a 8x8 board, it can only go to nine squares no matter where a dromedary is put initially. Using a 10x10 board instead increases the choices just marginally. In that case, there are at most 16 squares available.

[3c4/8/8/c2*1N2c1/8/8/3c4/8]
Dromedary (DR): (0,3)-leaper

[X2X2X2X/2x2x2x1/10/X2*1N2X2X/2*1n2x2x1/10/X2X2X2X/2x2x2x1/10/X2X2X2X]
Mobility of dromedaries on a 10x10 board. All potential destination squares after an arbitrary number of moves are marked respectively.

The ibis can only make monochromatic moves, but it can reach all 32 black or white squares of the 8x8 board. It would require an 11x11 board to show an ibis wheel.

[4c1c4/11/11/11/c9c/5*1N5/c9c/11/11/11/4c1c4]
Ibis (IB): (1,5)-leaper

The flamingo has a similar flaw when being used on an 8x8 board, for it is only moveable outside the area c3-c6-f6-f3. Finally, there is the antelope which is the most flexible piece of today's quartet.

[7c/1*1N6/7c/8/8/8/8/c1c5]
Flamingo (FL): (1,6)-leaper

[7c/8/8/3*1N4/8/8/7c/c5c1]
Antelope (AN): (3,4)-leaper

After this short but surely sufficient introduction it's time for some compositions where those fairy pieces are used.

  1Theodor Steudel  
feenschach 12/2005
 
[5K2/7*1n/6k1/8/8/8/4P3/8]
  h#5
  0.1...
(2+2)  
Dromedary h7

  2Erich Bartel  
Ideal-Mate Review 01-03/1999
Commendation
[8/6P1/8/8/8/k1K*1n4/8/8]
  h=2
  2.1...
(2+2)  
Ibis d3

  3Gabriel Nedeianu  
feenschach 12/2004
[8/7*1N/8/K7/8/8/8/1r5k]
  h#8
  
(2+2)  
Flamingo h7

  4Erich Bartel  
Problem Paradise 1998
[8/1p6/8/8/5b2/4p3/2p4p/2K4*1N]
  ser-=8
  2.1...
(2+5)  
Antelope h1

Solutions
11. - e4 2. DRh4! (2. DRe7?) e5 3. Kh7 e6 4. Kh8 e7 5. DRh7 e8=DR#
21. IBe8 g8=IB 2. IBf3 IB×f3 =
1. IBc8 g8=B 2. IBb3 B×b3 =
31. Kg2 FLb6 2. Kf3 FLh5 3. Ke4 FLb4 4. Kd5 FLh3 5. Kc6 FLb2 6. Kb7 FLh1 7. Ka8 Ka6 8. Rb8 FLg7#
41. ANe5 2. ANb1 3. AN×f4 4. ANxb7 5. AN×e3 6. ANh7 7. ANd4 8. ANh1 =
1. K×c2 2. Kd3 3. Ke4 4. K×f4 5. K×e3 6. Kd4 7. Kc5 8. Kb6 =
Antelope star with eight spikes. Either only king moves or only antelope moves.

By now, I've presented quite a bunch of animals. Each of the selected problems have been lightweight examples to concentrate on just one special piece. Now we might feel a little bit more courageous. How about combining several of those fairy pieces in one composition? Look at the last diagram for today — it shows seven different fairy pieces! That takes lots of different rotated pieces, of course.

Krassimir A. Gandev
feenschach 07/1971
[*1B4K2/P6*2Q/1R*1R*3B1*3NN*1N/3k2Pp/*2N7/4Pp2/p*2N3Pp1/*1N7]
  ser-h#3
  11.1...
(16+5)  
Zebra a1,h6
Nightrider a4, b2
Flamingo a8
Ibis c6
Giraffe d6
Camel f6
Grasshopper h7
    We get to see a Super-Allumwandlung:

1. g1=Q 2. Qg4 3. Qe6 Nc3#
1. g1=R 2. Rxg5 3. Re5 Sf4#
1. g1=B 2. Bh2 3. Be5 Se7#
1. g1=S 2. Se2 3. Sd4 e4#
1. g1=G 2. Gxg6 3. Ke5 Rb5#
1. g1=N 2. Ne2 3. Nxc6 Rb5#
1. g1=Z 2. Ze4 3. Zc7 Gb7#
1. g1=CA 2. CAf4 3. CAe7 Gd7#
1. g1=FL 2. FLxh7 3. FLb8 axb8=Z#
1. g1=IB 2. IBxh6 3. Ke4 Nc3#
1. g1=GI 2. GIc2 3. GIxd6 Nf4#

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