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Problem 582: Luis Martin - Fairy (HS#)
luis.martin(17.05.2015) Nice Help-Selfmate with ODT and Umnov by Luis Miguel.
 
 
 
 
 
 
 
 
 
582
 
1...Bxb1 2.Be3 Rc2 3.Ke4 Sf3 (Sf5?) 4.Bc5+ Rxc5#
1...Rxc1 2.Rb4 Bc2 3.Kc5 Sf5 (Sf3?) 4.Re4+ Bxe4#
 
Diagonal-orthogonal play. (Author)
 

Comments  

 
+2 #1 Ioannis Kalkavouras 2015-05-17 17:49
Beautiful ODT along with dual avoidance in a very nice setting. Congratulations to the author!
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+2 #2 Seetharaman Kalyan 2015-05-17 18:12
Excellent black grimshaw after critical moves. I think this has been done many times before. But the combination with Zilahi is probably new and very good!
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+5 #3 Kostas Prentos 2015-05-18 02:50
I take the opportunity from Seetharaman's comment to note that there is no Zilahi, according to the definition of the theme (the mating piece in one phase, is captured in the other). Here, the white piece gives the final check and forces the selfmate (not the mate). In helpselfmates, the Zilahi would be performed by Black, although this might feel coincidental, rather than an interesting theme.

However, due to the close relation with the "traditional" Zilahi, I wonder if this effect in helpselfmates (or selfmates), of the piece that forces the selfmate to be captured in the other phase, deserves (or if it already has) a name.
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+2 #4 Seetharaman Kalyan 2015-05-18 05:39
Of course, Zilahi is a theme born from the helpmate genre. But I think it is fits such problems as above. It will also fit selfmates or HS# I think, where there is scope for two types black or white !
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+2 #5 Rodolfo Riva 2015-05-18 09:01
Well found matrix with two nice series of bicolour Umnov.
About #3 and #4: when you allow me to call Zilahi the captures of black giving check units in Helpmate I will agree with similar exploits in HelpSelf and Selfmate. Notice that the so called Zilahi changed sex:
Mrs. W.J. Baird, British Chess Magazine 1893(!)
8/p1S1p3/1p2P3/1PpPK3/1QB2P1B/2r2Rs1/1S4Rb/4k3 (12+8) S#4
1.Qa5!, a6 2.Rxh2(thematic capture),axb5 3.Sxb5, bxa5 4.Re3+, Rxe3#
Bg1 2.Re3+, Bxe3 3.Qxc3(t. c.),Bd2 4.Sa6, Bxc3#
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