Madrasi Rex Inclusiv with active kings 4

We have already seen a few problem where both white and black kings move, either because they want (e.g. in h#2 by N. Shankar Ram) or because they are obliged to (e.g. checked kings). Let's look at a few more examples.
Yves Cheylan
Comm Rex Multiplex 1985

1.Kc2! zz
1...Sxf2 2.Kd3 d1Q#
1...Sxe3 2.Kb1 d1R#
1...Sxc3 2.Kb3 d1B#
1...Sxb2 2.Kxb2 d1S#
1...K~ 2.Re1 dxe1S#

Compare this to this Y. Cheylan's #2: the scheme of squares P-promotion + K vs. K is the same, moreover king is mated on connected squares after RSB promotions, just the sides are switched. But there is more strategy here as we have one more move and it is indeed very well used: 1...Sxf2 paralyzes Sg4 so that White cannot paralyze Qd1, 1...Sxe3 captures Re3e so that White cannot paralyze Rd1, 1...Sxc3 guards a2 and finally 1...Sxb2 allows wK to enter b2. If bK takes initiative, then White makes sure that bp can promote to knight at e1.

r#2 (11+5)
Madrasi Rex Inclusiv

Norman A. Macleod
dedicated to Bo Lindgren
feenschach 1988

1.b7! zz
1...g1Q 2.Ke6 Qg4#
1...g1R 2.Kc6 Rc1#
1...g1B 2.Kd6 Bh2#
1...g1S 2.Sf3 Ke6#
1...Kd6 2.c8B Rd8#

The mechanism of the problem is completely different if Black promotes already in the 1st move. White waits for promotion and then chooses the right square for self-paralysis of king. Queen promotion is met by single possibility as expected, with hidden wQa4 threatening to paralyze Qc1, Qh2 and Qb6 if wK moved wrongly to c6 or d6. Knight promotion is different this time, White unparalyzes Rd3 and Black fires royal battery. Black king might move also in 2nd move and then it is White who promotes.

semi-r#2 (11+6)
Madrasi Rex Inclusiv

Roméo Bedoni
113 feenschach 157 - XII 2004

1.Kc2 Kg2 2.Kxb3(b2) Kf3 3.Ka4 b4 4.Kb5 Ke4 5.Kc6 Kd5 6.c3 b5#

Only wp can mate, but it is tightly paralyzed, so that bK has capture him and that is why he circles own pawn instead of going more quickly to c6 via e4. Also wK has the reason to paralyze himself: his immobility allows shortest possible move by white pawn.

h#7 (2+2)
Double Maximummer, Circe
Madrasi Rex Inclusiv

René J. Millour
10553 Springaren 96 - 2004

1.e8Q{Ig5} 2.Qe5{Ig2} 3.Kg4{If3} 4.Kxf5{Ie4} 5.Qh2{Ih1} 6.Ke6{Ig2} 7.Qc7{Ib7} 8.Qf7{Ie7}+ Kxf7{Id8}#

Probably very difficult problem for human solving, although my computer has solved it in less than 6 seconds. I would try to construct mating position where bQ would be the mating piece. The right way to finale is however capture of bQ by wK - that self-paralyzes this way. But with imitator the paralysis can be one-way only! So wQ frees wK, he moves away and after check by wQ, she is captured and bK mates, while he is not paralyzed. Extremely weird indeed!

ser-s#8 (2+2+1)
Madrasi Rex Inclusiv
imitator g4

Juraj Lörinc
4959 Phenix 142, VII-VIII 2005

1...Kg5 2.LId2#
1...Kg3 2.LIc7#

1.LIe1? zz
1...Kg5 2.LIe3#
1...Kg3 2.LIe5#
1...Kg4 2.LIb4#
mais 1...h2!

1.LId8! th. 2.Kg5#
1...Kg5 2.LIf6#
1...Kg3 2.LId6#
1...Kg4 2.LId4#

Something more standard. Three-phase change of mates of type Z-(2,3,3)-38 results from quite basic idea of changing the position of one lion. What is the difference between try and solution? Of course, it is the threat, in which wK moves and mates by antibattery. There is no threat in the try so that 1...h2 is expected refutation.

#2 (8+7)
Madrasi Rex Inclusiv
4+2 lion

Krasimir Gandev
F0523 StrateGems 29 - I 2005

1.Kc4 2.Kb3 3.nGc2 4.Kc3 Kxc2(nGc1)#

1.Kc4 2.nGd4 3.Kd3 4.nGd2 Kxd2(nGd1)#

1.Kd4 2.nGe4 3.Ke3 4.nGe2 Kxe2(nGe1)#

And finally something usual for recent years: 3-fold echo. Neutral grasshopper cannot jump away, black king cannot move away. Clear. The only drawback is the unbalanced forking of solutions.

ser-h#4 (1+1+1)
Madrasi Rex Inclusiv, Circe
neutral grasshopper a4
1.2.1... & 1.1.1...

Comments to Juraj Lörinc.
Back to main page of Chess Composition Microweb.