MESON Chess Problem Database

Problem Display
PID: 232896 (4Q1b1/7r/5p2/8/5K1k/8/6P1/8 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Kudesnik, 2005

4Q1b1/7r/5p2/8/5K1k/8/6P1/8

#2

3 + 4

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Qe1#
  • Tries
    • 1.Qxg8?
      • threat
        • 2.Qxh7#
        • 2.Qg4#
      • 1...Kh5
        • 2.Qxh7#
      • 1...Rh5
        • 2.Qg3#
        • 2.Qg4#
      • 1...Rh6
        • 2.Qg4#
      • 1...Ra7
        • 2.Qg4#
      • 1...Rb7
        • 2.Qg4#
      • 1...Rc7
        • 2.Qg4#
      • 1...Rd7
        • 2.Qg4#
      • 1...Re7
        • 2.Qg4#
      • 1...Rf7
        • 2.Qg4#
      • 1...Rh8
        • 2.Qg4#
        • 2.Qxh8#
      • 1...f5
        • 2.Qxh7#
        • 2.Qg5#
      • 1...Rg7!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qg4#
      • 1...Rg7
        • 2.Qh6#
      • 1...Be6
        • 2.Qxh7#
      • 1...f5
        • 2.Qg5#

Anticipated by 38183(1993)

This anticipates 182608(2015)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(c);SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);XB(d)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(C),XR(c)
        • R(c);::QAR1(C)
      • Refutation
        • R(c);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • R(c);N_GUARD::QAR2(C)
      • B(d);N_GUARD::QAR(C),XR(c)
      • P(b);N_GUARD::QAB1(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).