MESON Chess Problem Database

Problem Display
PID: 77626 (5k2/8/3K3P/2pQ4/2P5/8/8/8 w - - 0 1)

Zickermann, Albert

Hamburger Problem-Nachrichten, 1947

5k2/8/3K3P/2pQ4/2P5/8/8/8

#2

4 + 2

5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Qg8#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Qa8#
        • 2.Qd8#
      • 1...Ke8
        • 2.Qa8#
      • 1...Kg8!
    • 1.Qg2?
      • 1...Ke8
        • 2.Qg8#
      • 1...Kf7!
    • 1.Qe5?
      • 1...Kg8
        • 2.Qg7#
      • 1...Kf7!
    • 1.Qg5?
      • 1...Ke8
        • 2.Qe7#
        • 2.Qg8#
      • 1...Kf7!
    • 1.h7?
      • threat
        • 2.Qg8#
        • 2.h8Q#
      • 1...Ke8
        • 2.Qg8#
        • 2.h8Q#
        • 2.h8R#
      • 1...Kg7!
  • Keys
    • 1.Qb7!
      • 1...Ke8
        • 2.Qe7#
      • 1...Kg8
        • 2.Qg7#

Anticipated by 182239(1906), 206698(1925), 227651(1926)

This anticipates 211353(1986)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
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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).