MESON Chess Problem Database

Problem Display
PID: 185354 (8/8/3p4/1b4B1/r2q4/2QN2Nk/5P2/3B2K1 w - - 0 1)

Carrez, Jean-Pierre

Robert, Philippe

diagrammes, 1974

8/8/3p4/1b4B1/r2q4/2QN2Nk/5P2/3B2K1

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf2+
      • 2.Sxf2#
  • Tries
    • 1.Qxd4?
      • threat
        • 2.Sf4#
        • 2.Bg4#
      • 1...Bxd3
        • 2.Bg4#
      • 1...Ra1
        • 2.Sf4#
        • 2.Qh8#
        • 2.Qg4#
        • 2.Qh4#
      • 1...Bd7
        • 2.Sf4#
      • 1...Rxd4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sf4#
      • 1...Qxf2+
        • 2.Sdxf2#
      • 1...Qxd3
        • 2.Qh8#
      • 1...Bxd3
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,XP(C)::S(E),XQ(c)
  • Tries
    • Try
      • Q(D);N_SPINP(C),XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XS(E)::B(A)
        • B(d);::S(E)
      • Refutation
        • R(b);XQ(D)
  • Actual
    • S(F);
    • Threat
      • QAR(D)+S(E),DCHECK
    • Vars
      • Q(c);CHECK,XP(C)::QAR(D)+S(E),DCHECK,XQ(c)
      • Q(c);N_PINP(C),OGATE,P_SPINQ(c),XS(E)::QAR(D)
      • B(d);N_GUARD,P_SPINB(d),XS(E)::QAB(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).