Problem Display
PID: 160569 (2K5/p2P4/1PQ5/k7/8/1P6/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

2K5/p2P4/1PQ5/k7/8/1P6/8/8

#2

5 + 2


15148 Sadier Collection 2017

SOLUTION


  • SOUND
  • Sets
    • 1...axb6
      • 2.Qa4#
    • 1...a6
      • 2.Qc5#
  • Tries
    • 1.Kb7?
      • threat
        • 2.Qa4#
        • 2.Qc5#
      • 1...axb6
        • 2.Qa4#
        • 2.Qxb6#
      • 1...Kb4!
    • 1.Kc7?
      • threat
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa4#
      • 1...Kb4!
    • 1.b4+?
      • 1...Ka6
        • 2.b7#
      • 1...Kxb4!
    • 1.b7?
      • 1...a6
        • 2.Qc5#
      • 1...Kb4!
    • 1.d8Q?
      • threat
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa4#
        • 2.b7#
      • 1...Kb4!
    • 1.d8B?
      • threat
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa4#
        • 2.b7#
      • 1...Kb4!
  • Keys
    • 1.Qc4!
      • 1...Kxb6
        • 2.d8Q#
        • 2.d8B#
      • 1...axb6
        • 2.Qa4#
      • 1...a6
        • 2.Qc5#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XP(B)::QAR1(C)
    • P(b);SBLOCK::QAR2(C)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(E);P-FLIGHT
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(C)+P(B)
      • Refutation
        • K(a);S_FLIGHT,XP(A)
    • Try
      • P(B);
      • Vars
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(D);
      • Threat
        • QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(D);
      • Threat
        • QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT,XP(B)::P=Q
      • P(b);SBLOCK,XP(B)::QAR1(C)
      • P(b);SBLOCK::QAR2(C)


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).