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Problem Display

PID: 274338 (1B6/8/8/K2Q2p1/1p5q/1p1Nk3/1R6/8 w - - 0 1)

Kupper, Josef

Zurcher Woche, 1960

1B6/8/8/K2Q2p1/1p5q/1p1Nk3/1R6/8

#2

5 + 5

15601	Albrecht-Leiss-Degener Collection	2023

SOLUTION

SOUND
Sets
- 1...Qe1
  - 2.Ba7#
- 1...Qf2
  - 2.Ba7#
- 1...Qg3
  - 2.Ba7#
- 1...Qh1
  - 2.Ba7#
- 1...Qh2
  - 2.Ba7#
- 1...Qh3
  - 2.Ba7#
- 1...Qh5
  - 2.Ba7#
- 1...g4
  - 2.Bf4#
  - 2.Ba7#
Tries
- 1.Se1?
  - threat
    - 2.Sg2#
    - 2.Qd3#
  - 1...Qf2
    - 2.Qd3#
    - 2.Qe5#
  - 1...Qg3
    - 2.Qd3#
  - 1...Qh1
    - 2.Qd3#
  - 1...Qh2
    - 2.Qd3#
  - 1...Qh3
    - 2.Qd3#
    - 2.Qe5#
  - 1...Qc4
    - 2.Sg2#
  - 1...Qd4
    - 2.Qf3#
  - 1...Qe4
    - 2.Qd2#
  - 1...Qg4
    - 2.Qd3#
  - 1...Qh7
    - 2.Sg2#
  - 1...Qxe1!
- 1.Sf4?
  - threat
    - 2.Sg2#
    - 2.Re2#
    - 2.Qd3#
  - 1...gxf4
    - 2.Ba7#
  - 1...Qe1
    - 2.Sg2#
    - 2.Qd3#
  - 1...Qf2
    - 2.Rxb3#
    - 2.Qd3#
  - 1...Qg3
    - 2.Re2#
    - 2.Qd3#
  - 1...Qh1
    - 2.Re2#
    - 2.Qd3#
  - 1...Qh2
    - 2.Qd3#
  - 1...Qh3
    - 2.Re2#
    - 2.Qd3#
  - 1...Qg4
    - 2.Qd3#
  - 1...Qh5
    - 2.Sg2#
    - 2.Qd3#
  - 1...Qh7
    - 2.Sg2#
    - 2.Re2#
  - 1...Qxf4!
Keys
- 1.Se5!
  - 1...Kf4
    - 2.Qf3#
  - 1...Qc4
    - 2.Sxc4#
  - 1...Qe1
    - 2.Sc4#
    - 2.Sg4#
  - 1...Qf2
    - 2.Sc4#
    - 2.Sg4#
  - 1...Qg3
    - 2.Sc4#
  - 1...Qh1
    - 2.Sc4#
    - 2.Sg4#
  - 1...Qh2
    - 2.Sc4#
    - 2.Sg4#
  - 1...Qh3
    - 2.Sc4#
  - 1...Qd4
    - 2.Qf3#
  - 1...Qe4
    - 2.Qd2#
  - 1...Qf4
    - 2.Qd3#
  - 1...Qg4
    - 2.Sxg4#
  - 1...Qh5
    - 2.Sc4#
  - 1...Qh6
    - 2.Sc4#
    - 2.Sg4#
  - 1...Qh7
    - 2.Sc4#
    - 2.Sg4#
  - 1...Qh8
    - 2.Sc4#
    - 2.Sg4#
  - 1...g4
    - 2.Sc4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 3
- ADDED MATES = 7
- REMOVED MATES = 4
Sets
- Q(d);N_GUARD::B(E)
Tries
- Try
  - S(B);
  - Threat
    - DUALS(2)
  - Vars
    - Q(d);::QAR1(D)
    - Q(d);::S(B)
    - Q(d);SBLOCK::QAR1(D)
    - Q(d);SBLOCK::QAB1(D)
  - Refutation
    - Q(d);XS(B)
- Try
  - S(B);
  - Threat
    - DUALS(3)
  - Vars
    - P(e);SBLOCK,XS(B)::B(E)
    - Q(d);::QAR1(D)
  - Refutation
    - Q(d);XS(B)
Actual
- S(B);
- Vars
  - K(b);N_GUARD,S_FLIGHT::QAR1(D)
  - Q(d);N_GUARD::S(B),XQ(d)
  - Q(d);N_GUARD::S(B)
  - Q(d);SBLOCK::QAR1(D)
  - Q(d);SBLOCK::QAB1(D)
  - P(e);S_CUTQ(d)::S(B)

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).