MESON Chess Problem Database

Problem Display
PID: 90072 (8/3N4/8/1N5Q/2P1k3/8/3Kn3/8 w - - 0 1)

Rosberger, Jack

Die Schwalbe, 1995

8/3N4/8/1N5Q/2P1k3/8/3Kn3/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qg4#
    • 1...Sg1
      • 2.Qg4#
    • 1...Sc3
      • 2.Qg4#
    • 1...Sg3
      • 2.Qg4#
    • 1...Sd4
      • 2.Qg4#
    • 1...Sf4
      • 2.Sc5#
      • 2.Sf6#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Qc5#
        • 2.Qd5#
      • 1...Sxc3
        • 2.Qg4#
      • 1...Kf4!
    • 1.Sd6+?
      • 1...Kd4
        • 2.Qc5#
        • 2.Qd5#
        • 2.Qe5#
        • 2.Qh8#
      • 1...Kf4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Qh4#
      • 1...Sxd4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAR2(D)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);XS(C)::QAR2(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(D)
    • Vars
      • K(b);P-FLIGHT,XS(C)::QAR1(D)
      • K(b);P-FLIGHT::QAR2(D)
      • S(a);N_GUARD,SBLOCK,XS(C)::QAR2(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).