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Problem Display

PID: 151930 (6K1/1P3P1P/1n1ppp2/2P1k3/p3P3/3PP3/8/8 w - - 0 1)

Oestreicher, Michael

Die Schwalbe, 2014

6K1/1P3P1P/1n1ppp2/2P1k3/p3P3/3PP3/8/8

#2

8 + 6

SOLUTION

SOUND
Sets
- 1...dxc5
  - 2.b8Q#
  - 2.b8B#
- 1...d5
  - 2.b8Q#
  - 2.b8B#
- 1...f5
  - 2.h8Q#
  - 2.h8B#
Tries
- 1.cxb6?
  - 1...d5
    - 2.b8Q#
    - 2.b8B#
  - 1...f5
    - 2.h8Q#
    - 2.h8B#
  - 1...a3!
- 1.b8Q?
  - threat
    - 2.Qxd6#
  - 1...f5
    - 2.h8Q#
    - 2.h8B#
  - 1...Sc8
    - 2.Qb2#
  - 1...Sc4!
- 1.b8S?
  - threat
    - 2.Sc6#
  - 1...f5
    - 2.h8Q#
    - 2.h8B#
  - 1...dxc5!
- 1.h8S?
  - threat
    - 2.Sg6#
  - 1...dxc5
    - 2.b8Q#
    - 2.b8B#
  - 1...f5!
Keys
- 1.f8S!
  - threat
    - 2.Sg6#
  - 1...dxc5
    - 2.b8Q#
    - 2.b8B#
  - 1...f5
    - 2.h8Q#
    - 2.h8B#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- P(d);XP(D)::P=Q
- P(d);::P=Q
- P(f);::P=Q
Tries
- Try
  - P(D);XS(c)
  - Vars
    - P(d);::P=Q
    - P(f);::P=Q
  - Refutation
    - P(a);
- Try
  - P(E);P_PINP(d)
  - Threat
    - QAB1(E),XP(d)
  - Vars
    - P(f);::P=Q
    - S(c);OGATE::QAB(E)
  - Refutation
    - S(c);
- Try
  - P(E);
  - Threat
    - S(E)
  - Vars
    - P(f);::P=Q
  - Refutation
    - P(d);XP(D)
- Try
  - P(G);
  - Threat
    - S(G)
  - Vars
    - P(d);XP(D)::P=Q
  - Refutation
    - P(f);
Actual
- P(F);
- Threat
  - S(F)
- Vars
  - P(d);XP(D)::P=Q
  - P(f);::P=Q

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).