MESON Chess Problem Database

Problem Display
PID: 22182 (qk6/Np6/8/1K6/5R2/8/Q7/8 w - - 0 1)

Tuxen, Harri Viggo

4th Prize, Leninska molodi, 1967

qk6/Np6/8/1K6/5R2/8/Q7/8

#2

4 + 3

3713 Snap 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Rf7?
      • 1...b6
        • 2.Qh2#
      • 1...Qxa7!
    • 1.Qg8+?
      • 1...Kxa7
        • 2.Ra4#
      • 1...Kc7!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Ra4#
      • 1...Kxa7
        • 2.Ra4#
      • 1...Kc7
        • 2.Rd4#
      • 1...Qxa7
        • 2.Rf8#
      • 1...b6
        • 2.Rf7#

This anticipates 67254(2006), 69864(2006)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • P(a);::QAB(A)
      • Refutation
        • Q(b);XS(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(D)::R(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(B)
    • Vars
      • K(c);S_FLIGHT,XS(D)::R(B)
      • K(c);S_FLIGHT::QAB(A)+R(B)
      • Q(b);SBLOCK,XS(D)::QAB(A)+R(B),DCHECK
      • P(a);::QAB(A)+R(B)
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).