MESON Chess Problem Database

Problem Display
PID: 136971 (8/8/6Q1/7r/R3K2k/7r/6P1/8 w - - 0 1)

Janicijevic, Svetislav

Liga Problemista, 1982/I

8/8/6Q1/7r/R3K2k/7r/6P1/8

#2

4 + 3

6490 yacpdb 2010
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Kd3#
      • 2.Ke3#
      • 2.Kf3#
    • 1...Rh2
      • 2.Kd3#
      • 2.Ke3#
      • 2.Kf3#
    • 1...Rd3
      • 2.Kxd3#
    • 1...Re3+
      • 2.Kxe3#
    • 1...Rf3
      • 2.Kxf3#
    • 1...Rd5
      • 2.Kxd5#
    • 1...Re5+
      • 2.Kxe5#
    • 1...Rf5
      • 2.Kxf5#
    • 1...Rh6
      • 2.Kd5#
      • 2.Ke5#
      • 2.Kf5#
    • 1...Rh7
      • 2.Kd5#
      • 2.Ke5#
      • 2.Kf5#
    • 1...Rh8
      • 2.Kd5#
      • 2.Ke5#
      • 2.Kf5#
  • Keys
    • 1.Kf4!
      • threat
        • 2.Qg4#
      • 1...Rf3+
        • 2.Kxf3#
      • 1...Rf5+
        • 2.Kxf5#
      • 1...Rg3
        • 2.Qxg3#
      • 1...Rg5
        • 2.Qxg5#

This anticipates 169279(2017)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);::R(B)+K(C),XR(a)
    • R(a);CHECK::R(B)+K(C),XR(a)
    • R(c);::R(B)+K(C),XR(c)
    • R(c);CHECK::R(B)+K(C),XR(c)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAR1(D)
    • Vars
      • R(a);CHECK::R(B)+K(C),XR(a)
      • R(c);CHECK::R(B)+K(C),XR(c)
      • R(a);N_GUARD::QAB1(D),XR(a)
      • R(c);N_GUARD::QAB1(D),XR(c)
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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).