MESON Chess Problem Database

Problem Display
PID: 255603 (4k3/8/4K3/b7/8/8/Q7/8 w - - 0 1)

Renner, Kurt

Wiener Schachzeitung, 1934

4k3/8/4K3/b7/8/8/Q7/8

#2

2 + 2

15601 Albrecht-Leiss-Degener Collection 2021
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Qa8#
    • 1...Bd2
      • 2.Qa8#
    • 1...Bc3
      • 2.Qa8#
    • 1...Bb4
      • 2.Qa8#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...Bb4
        • 2.Qa8#
      • 1...Bc3
        • 2.Qa8#
      • 1...Kd8!
    • 1.Qb2?
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8
        • 2.Qh8#
      • 1...Bc3
        • 2.Qb8#
      • 1...Bb4!
    • 1.Qa4+?
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8
        • 2.Qh8#
      • 1...Bb4
        • 2.Qb8#
      • 1...Bc3
        • 2.Qb8#

Anticipated by 47227(1849), 36807(1898)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • B(a);OGATE::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(b);P-FLIGHT,S_CUTB(a)::QAR2(A)
        • K(b);P-FLIGHT::QAR2(A)
        • B(a);N_GUARD::QAR(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(b);P-FLIGHT,S_CUTB(a)::QAR2(A)
      • K(b);P-FLIGHT::QAR2(A)
      • B(a);N_GUARD::QAR(A)
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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).