MESON Chess Problem Database

Problem Display
PID: 181769 (1K6/8/1Q3R1R/4p3/5pk1/8/1p2P3/1q6 w - - 0 1)

Volf, Josef

Lidove noviny, 1905

1K6/8/1Q3R1R/4p3/5pk1/8/1p2P3/1q6

#2

5 + 5

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Qg1#
    • 1...Qc2
      • 2.Qg1#
    • 1...Qf5
      • 2.Qg1#
    • 1...Qg6
      • 2.Qg1#
    • 1...Qh7
      • 2.Qg1#
    • 1...Qg1
      • 2.Qxg1#
  • Tries
    • 1.Rfg6+?
      • 1...Qxg6
        • 2.Qxg6#
      • 1...Kf5!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qg6#
      • 1...Kg3
        • 2.Rg5#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Qxf5
        • 2.Qg1#

Anticipated by 230964(1899)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::QAR(B)
    • Q(a);N_GUARD::QAR(B),XQ(a)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • Q(a);OGATE,XR(C)::QAR2(B),XQ(a)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(C);
    • Threat
      • QAR2(B)
    • Vars
      • K(d);P-FLIGHT::R(C)
      • K(d);S_FLIGHT,XR(C)::QAB1(B)
      • Q(a);N_GUARD,SBLOCK,XR(C)::QAR(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).