MESON Chess Problem Database

Problem Display
PID: 169204 (8/8/8/8/4nKN1/4Q3/4p3/4rkN1 w - - 0 1)

Hadzi-Vaskov, Georgi

Sp. Comm., SuperProblem (Blackjack 5), 2014

8/8/8/8/4nKN1/4Q3/4p3/4rkN1

#2

4 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qf2#
    • 1...Sf2
      • 2.Qxf2#
    • 1...Sc3
      • 2.Qf2#
    • 1...Sg3
      • 2.Qf2#
    • 1...Sc5
      • 2.Qf2#
    • 1...Sg5
      • 2.Qf2#
    • 1...Sd6
      • 2.Qf2#
    • 1...Sf6
      • 2.Qf2#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Qg1#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Kg2!
    • 1.Qf3+?
      • 1...Sf2
        • 2.Qxf2#
      • 1...Kxg1!
  • Keys
    • 1.Sh3!
      • threat
        • 2.Qg1#
      • 1...Kg2
        • 2.Qf3#
      • 1...Sf2
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • S(d);N_GUARD::QAR1(B)
    • S(d);N_GUARD::QAR1(B),XS(d)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(B)
      • Vars
        • S(d);N_GUARD::QAR1(B),XS(d)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAR1(B),XS(d)
      • Refutation
        • K(b);P-FLIGHT,XS(A)
  • Actual
    • S(A);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • S(d);N_GUARD::QAR1(B),XS(d)
HTML5 logo

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).