MESON Chess Problem Database

Problem Display
PID: 273380 (8/2K3Qp/4NP1p/1R2pk1P/5N2/3R3P/p7/8 w - - 0 1)

Jada, Faud Emile

diagrammes, 1978

8/2K3Qp/4NP1p/1R2pk1P/5N2/3R3P/p7/8

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxh7#
  • Tries
    • 1.Sd4+?
      • 1...Kxf4
        • 2.Qg4#
      • 1...Ke4!
    • 1.Qg4+?
      • 1...Ke4
        • 2.Sc5#
        • 2.Rb4#
      • 1...Kxf6!
    • 1.Qg5+?
      • 1...Ke4
        • 2.Sc5#
        • 2.Rb4#
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...hxg5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qg4#
      • 1...Ke4
        • 2.Qxh7#
      • 1...Kxe6
        • 2.Qd7#
      • 1...e4
        • 2.Sdf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,N_SPINP(b),S_FLIGHT::QAB(I),XP(e)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINP(b),P-FLIGHT,XS(C)::QAR1(I)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • Q(I);CHECK
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,XP(G)
    • Try
      • Q(I);CHECK
      • Refutation
        • P(d);XQ(I)
  • Actual
    • S(C);N_PINP(b)
    • Threat
      • QAB1(I)
    • Vars
      • K(c);N_GUARD,S_FLIGHT::QAB(I),XP(e)
      • K(c);OGATEB,S_FLIGHT,XS(F)::QAB1(I)
      • P(b);SBLOCK::R(D)+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).