Selfmates 9


Here we have other s#2 with Black correction that I found during very quick search in my materials. They can serve as examples for selfmate section of League of Macedonian problemists 2000.
Luigi Ceriani
Die Schwalbe 1932

1.Be3! zz,
1...Qe4~ 2.Qe4+ Qxe4#
1...Qe5! (Qf4!, Qg4+!, Qxe3!, Qg6+!) 2.Qg3+ Qxg3#
1...Qe6! (Qf5!) 2.Qh3+ Qxh3#

Two groups of queen corrections leading to two different white continuations.









s#2 (5+6)

Luigi Ceriani
Anton Trilling
Nenad Petrovic

Die Schwalbe 1932

1.Bxe2! zz,
1...Qe4~ 2.Qe4+ Qxe4#
1...Qe5! (Qf4!, Qg4+!, Qe3!, Qg2+!) 2.Qg5+ Qxg5#
1...Qf3! (Qe6+!, Qd4!, Qc6+!) 2.Qf6+ Qxf6#
1...Qxe2! 2.Qh5+ Qxh5#

Here the authors managed to add one more correction with different white attack in 2nd move compared to previous work.









s#2 (11+4)

Gerald Frank Anderson
5th HM British Chess Federation 1947

1.Ba7! th. 2.f3+ Rxf3#
1...Rc3~+ 2.Qe5+ Bxe5#
1...Rc5+! 2.Qd4+! Bxd4#
1...Bf5 2.Sc5+ Rxc5#
1...Rxa7 2.Qc6+ Rxc6#
1...Rb6 2.Qd3+ Rxd3#

Black correction is only of small part of 5 variations complex including complete white halfpin use. Error of Rc3~ is opening a1-f6 line for black bishop, in Rc5! it is neutralized by additional guarding of e5, but it carries further error of closing a7-d4 line.









s#2 (8+6)

Karl A. K. Larsen
The Problemist 1958

1.Ra5! zz,
1...Se4~ 2.Qb4+ Bxb4#
1...Sd6! 2.Qf7+! Sxf7#
1...Sc5! 2.Qe6+! Sxe6#
1...Kd5 2.Kb4! Bxe7#

Pure work. Key blocks a5 for white king anticipating black king's run to flight that pins Se4. Its random move opens f3-d5 allowing Pelle move (move along pin line) by white queen, corrections cut line of this move, but they create masked battery that is transformed into normal battery by subsequent white check and fired. Variation 1...Kd5 is delicious too.









s#2 (11+9)

Alexander Grin
The Problemist 1973

1.Qb5! th. 2.Qxc5! Rxb1#
1...Sc5~ 2.c4+ Rxb1#
1...Sd3! 2.c3! Rxb1#
1...Rxb1+ 2.Qf1+ Rxf1#
1...e4 2.Sc4 Rxb1#

White hunts Sc5, its run from c5 allows White to fire Bb1-pc2-Kf5 battery. The correction is a bit strange - it doesn't defend secondary threat of c4+ by removing check (as normal pinning black knight would force Rxb1 too), but by anticipatory removing guard from e4 by Bb1 (1...Sd3! 2.c4? Ke4!!) - Lewman defence. Thus white mustn't close the line of Rc4. Variation 1...e4 completes black halfpin.









s#2 (11+8)

Valentin Rudenko
Viktor Chepizhny

6th Place 1st WCCT 1975

a) 1.Bh2! zz,
1...Sc7~ 2.Rf4+ Bxf4#
1...Sxe6! 2.Bf4! Bb8~#

b) 1.Re8! zz,
1...Sc7~ 2.Bf4+ Bxf4#
1...Sxe6! 2.Rf4! Bb8~#

Excellent reciprocal change - it may be also called secondary le Grand as it is in fact reciprocal secondary threat paradox.









s#2 (11+7)
b) g4 -» e3

Jozef Taraba
Sachove Umenie 1982

1...Bd3~ 2.Scxe2+ Sxe2#
1...Bxc2! 2.Sdxe2+ Sxe2#
1.Bb1! zz,
1...Bd3~ 2.Sdxe2+ Sxe2#
1...Bxb1! 2.Scxe2+ Sxe2#

Another problem with correction in two phases, less ambitious theme, but it is done in set play and solution. Again white moves reciprocally change their functions of secondary threat and continuation after correction, but the black correction isn't the same in two phases.









s#2 (6+10)

Comments to Juraj Lörinc.
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