MESON Chess Problem Database

Problem Display
PID: 164241 (8/3p2K1/3r1P1p/2QPkP1R/3pp1n1/4p1P1/7B/8 w - - 0 1)

Lider, Valentin Viktorovich

Novi Temi, 1976

8/3p2K1/3r1P1p/2QPkP1R/3pp1n1/4p1P1/7B/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qe7#
    • 1...Ra6
      • 2.d6#
    • 1...Rb6
      • 2.d6#
    • 1...Re6
      • 2.d6#
      • 2.fxe6#
    • 1...Rxf6
      • 2.d6#
    • 1...Sf2
      • 2.g4#
    • 1...Sxf6
      • 2.g4#
  • Keys
    • 1.f7!
      • threat
        • 2.f6#
      • 1...Rg6+
        • 2.fxg6#
      • 1...Rxd5
        • 2.Qe7#
      • 1...Rf6
        • 2.d6#
      • 1...Sf6
        • 2.g4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(f);OGATE,P_SPINR(f),SBLOCK,XP(D)::QAR2(C)
    • R(f);OGATE::QAR(C)+P(D)
    • R(f);OGATE,XP(G)::QAR(C)+P(D)
    • S(d);OGATE::B(A)+P(B)
    • S(d);OGATE,XP(G)::B(A)+P(B)
  • Actual
    • P(G);
    • Threat
      • R(F)+P(E)
    • Vars
      • R(f);CHECK,OGATE::R(F)+P(E),XR(f)
      • R(f);OGATE,P_SPINR(f),SBLOCK,XP(D)::QAR2(C)
      • R(f);OGATE::QAR(C)+P(D)
      • S(d);OGATE::B(A)+P(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).