Website founded by
Milan Velimirović
in 2006

11:10 UTC
ISC 2024



Remember me

Forgot your
Click here!
to create your account if you don't already have one.

Rating lists


MatPlus.Net Forum General White Line Combinations in Selfmate
You can only view this page!
Page: [Previous] [Next] 1 2
(21) Posted by Frank Richter [Friday, Sep 22, 2023 14:32]

I think, this mechanism is not new.
Following position is quite ugly too, but saves one third of pieces:

(= 8+10 )

1.Rb5! f5 2.d4+ Ke4#
1.- c:b5 2.Qd5+ K:d5#

Without Pe6 we would have also 1.- e6 2.Qd4+, but there are cooks.
(Read Only)pid=25304
(22) Posted by Hauke Reddmann [Friday, Sep 22, 2023 15:11]

@Frank: My beef here would be that Rb4 stands behind the Q,
so "three lines" is debatable. What about

(= 11+10 )

with sort of a "Sonderform"? (White first opens the line
which is subsequently closed). Also, I immediately see the
possibility that Se3 could threat something like Sxg4 Rxg4#.

EDIT: Like this?
(= 11+10 )

(Read Only)pid=25305
(23) Posted by Viktoras Paliulionis [Saturday, Sep 23, 2023 01:14]

WR is unused.
(Read Only)pid=25308
(24) Posted by Hauke Reddmann [Saturday, Sep 23, 2023 20:28]

True, but not exactly an unknown blemish
considering the same theme in the #2. :-)

(= 10+11 )

At least a bit more play and tries with the unused rook.

@Frank: digging up a concrete anticipation would
be of help if I even write an article :-)
(Read Only)pid=25310
(25) Posted by Viktoras Paliulionis [Sunday, Sep 24, 2023 13:11]

Vladimir N. Zabunov
4193 Schach , p. 60, 02/1963
(= 8+14 )

1.Bh5! [2.Bxf3+ Bxf3#]
1... g4 2.c4+ Ke4#
1... c4 2.e4+ Kc5#

Move Be8->g6, then 1.Bg6-h5 will unguard e4.
(Read Only)pid=25311
(26) Posted by Viktoras Paliulionis [Sunday, Sep 24, 2023 14:18]

Another example:

Laszlo Talaber
340 Problem 05/1953
1st Prize
(= 11+13 )

1.Qc3! ~ 2.Rf4+ Kxf4#
1...Sb1/Sb3 2.Se3+ Qxe3#
1...Sf3 2.e4+ Kf4#
1...Se4 2.dxe4+ Kf4#
1...Sc4 2.Qxf6+ Kxf6#

The g4 square (more precisely, the mating line) is attacked by two white linear pieces bR and wB (indirectly after e4+).
It is possible to get a third guard of g4 by changing the position a little:

(= 11+13 )

(= 11+13 )
1.Qh8? f6! 1.Qc3!
(Read Only)pid=25312
(27) Posted by Hauke Reddmann [Sunday, Sep 24, 2023 18:36]

@Viktoras: THX for the interesting examples.
Note, though, that in the latter ones Sf3 doesn't (preemptively)
cut a line to a flight but a line to an interference.
(Read Only)pid=25313

No more posts
Page: [Previous] [Next] 1 2

MatPlus.Net Forum General White Line Combinations in Selfmate