MESON Chess Problem Database

Problem Display
PID: 225512 (7b/4p3/4R3/1N1kP2Q/4RK2/8/8/8 w - - 0 1)

Hernitz, Zvonimir

Praca, 1957

7b/4p3/4R3/1N1kP2Q/4RK2/8/8/8

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5+
      • 2.Qxe5#
    • 1...Bf6
      • 2.exf6#
  • Tries
    • 1.Sc3+?
      • 1...Kxe6
        • 2.Qf5#
      • 1...Kc5!
    • 1.Rd4+?
      • 1...Kxe6
        • 2.Sc7#
        • 2.Qf5#
      • 1...Kc5!
    • 1.Qe2?
      • threat
        • 2.Qc4#
      • 1...Bxe5+
        • 2.R4xe5#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kxe6!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qc6#
      • 1...Bxe5+
        • 2.R6xe5#
      • 1...Kc5
        • 2.Qc6#
      • 1...Kxe6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(c);CHECK,OGATE,P_SPINB(c),XP(D)::QAR1(E),XB(c)
    • B(c);OGATE::QAR(E)+P(D),XB(c)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(F)::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • B(c);CHECK,OGATE,XP(D)::R1(A),XB(c)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • B(c);CHECK,OGATE,XP(D)::R1(F),XB(c)
      • K(a);P-FLIGHT::QAR1(E)
      • K(a);P_SPINP(b),S_FLIGHT,XR(F)::S(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).