MESON Chess Problem Database

Problem Display
PID: 190323 (5kB1/3r4/4QK2/8/3N4/7b/8/8 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Sachova skladba, 2010

5kB1/3r4/4QK2/8/3N4/7b/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qf7#
    • 1...Rd5
      • 2.Qf7#
    • 1...Rf7+
      • 2.Qxf7#
    • 1...Rd8
      • 2.Qf7#
  • Tries
    • 1.Qxd7?
      • threat
        • 2.Qf7#
        • 2.Qd8#
      • 1...Kxg8
        • 2.Qg7#
      • 1...Be6
        • 2.Qd8#
      • 1...Bxd7!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Qe8#
      • 1...Rxf7+
        • 2.Qxf7#
      • 1...Bxe6
        • 2.Sxe6#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Re7
        • 2.Qxe7#
      • 1...Rd8
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD,XS(A)::QAR1(B)
    • R(b);N_GUARD::QAR1(B)
    • R(b);CHECK,N_GUARD::QAR1(B),XR(b)
  • Tries
    • Try
      • Q(B);XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT,XB(D)::QAR1(B)
        • B(a);::QAR2(B)
      • Refutation
        • B(a);XQ(B)
  • Actual
    • B(D);
    • Threat
      • QAR1(B)
    • Vars
      • R(b);CHECK,OGATE,XB(D)::QAR1(B),XR(b)
      • B(a);XQ(B)::S(A),XB(a)
      • R(b);N_GUARD,P_PINQ(B)::QAB(B),XR(b)
      • R(b);N_GUARD::QAB1(B),XR(b)
      • R(b);N_GUARD::QAB1(B)
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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).