MESON Chess Problem Database

Problem Display
PID: 164453 (1K2R3/3k1pP1/Q7/8/6n1/8/8/8 w - - 0 1)

Pikhurov, Dimitry Egorovich

Sachmatija, 2007

1K2R3/3k1pP1/Q7/8/6n1/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qe6#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Re6?
      • threat
        • 2.Qc8#
        • 2.Qd6#
      • 1...Kd8
        • 2.Qd3#
        • 2.Qc8#
        • 2.Qd6#
      • 1...fxe6!
    • 1.Re7+?
      • 1...Kd8
        • 2.Qd6#
      • 1...Kxe7!
    • 1.Rd8+?
      • 1...Ke7
        • 2.Qd6#
      • 1...Kxd8!
    • 1.Qb7+?
      • 1...Kxe8
        • 2.g8Q#
        • 2.g8R#
      • 1...Kd6!
    • 1.Qd6+?
      • 1...Kxe8
        • 2.g8Q#
        • 2.g8R#
      • 1...Kxd6!
  • Keys
    • 1.g8S!
      • 1...Kxe8
        • 2.Qc8#
      • 1...Sf2
        • 2.Sf6#
      • 1...Sh2
        • 2.Sf6#
      • 1...Se3
        • 2.Sf6#
      • 1...Se5
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sh6
        • 2.Sf6#
      • 1...f5
        • 2.Qe6#
      • 1...f6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAB1(A)
  • Tries
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);XR(D)
    • Try
      • R(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
    • Try
      • R(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(D)::P=Q
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(D)::P=Q
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
  • Actual
    • P(B);
    • Vars
      • K(b);S_FLIGHT,XR(D)::QAR2(A)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • P(c);N_GUARD::QAB1(A)
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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).