MESON Chess Problem Database

Problem Display
PID: 77001 (6kq/6pR/8/5QKN/8/8/8/8 w - - 0 1)

Subotic, Miroslav

The Problemist, 2007

6kq/6pR/8/5QKN/8/8/8/8

#2

4 + 3

3713 Snap 2008
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...g6
      • 2.Qf7#
  • Tries
    • 1.Kg4?
      • 1...g6
        • 2.Qf7#
      • 1...g5
        • 2.Qf7#
      • 1...Qxh7!
    • 1.Sg3?
      • 1...g6
        • 2.Qf7#
      • 1...Qxh7!
    • 1.Sf4?
      • 1...g6
        • 2.Qf7#
      • 1...Qxh7!
    • 1.Qe6+?
      • 1...Kf8
        • 2.Rxh8#
      • 1...Kxh7!
    • 1.Qg6?
      • 1...Qxh7
        • 2.Qe8#
      • 1...Kf8!
    • 1.Qf7+?
      • 1...Kxh7
        • 2.Sf6#
      • 1...Kxf7!
  • Keys
    • 1.Qd7!
      • 1...Kxh7
        • 2.Sf6#
      • 1...Kf8
        • 2.Rxh8#
      • 1...Qxh7
        • 2.Qe8#
      • 1...g6
        • 2.Qf7#

Anticipated by 38470(1925), 15517(1985)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);::QAB1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • Q(c);XR(D)
    • Try
      • S(C);
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • Q(c);XR(D)
    • Try
      • S(C);
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • Q(c);XR(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(D),XQ(c)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • Q(c);SBLOCK,XR(D)::QAR2(A)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XR(D)::S(C)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT,XR(D)::S(C)
      • K(b);P-FLIGHT::R(D),XQ(c)
      • Q(c);SBLOCK,XR(D)::QAR2(A)
      • P(a);::QAB1(A)
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).