MESON Chess Problem Database

Problem Display
PID: 181827 (6rk/6R1/7N/6nN/8/4p3/4K3/6Q1 w - - 0 1)

van Dijk, Johannes

Schaakblad, 1905

6rk/6R1/7N/6nN/8/4p3/4K3/6Q1

#2

5 + 4

6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Sf7#
    • 1...Sh3
      • 2.Sf7#
    • 1...Se4
      • 2.Sf7#
    • 1...Se6
      • 2.Sf7#
    • 1...Sf7
      • 2.Sxf7#
    • 1...Sh7
      • 2.Sf7#
      • 2.Rxg8#
  • Tries
    • 1.Rh7+?
      • 1...Sxh7
        • 2.Sf7#
        • 2.Qxg8#
      • 1...Kxh7!
    • 1.Qxg5?
      • threat
        • 2.Sf7#
      • 1...Rxg7
        • 2.Qxg7#
      • 1...Rf8!
  • Keys
    • 1.Qa1!
      • 1...Rxg7
        • 2.Qxg7#
      • 1...Ra8
        • 2.Ra7#
        • 2.Qxa8#
      • 1...Rb8
        • 2.Rb7#
      • 1...Rc8
        • 2.Rc7#
      • 1...Rd8
        • 2.Rd7#
      • 1...Re8
        • 2.Re7#
      • 1...Rf8
        • 2.Rf7#
      • 1...Sf3
        • 2.Sf7#
      • 1...Sh3
        • 2.Sf7#
      • 1...Se4
        • 2.Sf7#
      • 1...Se6
        • 2.Sf7#
      • 1...Sf7
        • 2.Sxf7#
      • 1...Sh7
        • 2.Sf7#
        • 2.Rxg8#

This anticipates 138396(1935)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::S(D)
    • S(b);N_GUARD::S(D),XS(b)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(d);P-FLIGHT,XR(E)
    • Try
      • Q(A);XS(b)
      • Threat
        • S(D)
      • Vars
        • R(c);OGATE,XR(E)::QAB1(A),XR(c)
      • Refutation
        • R(c);
  • Actual
    • Q(A);
    • Vars
      • R(c);OGATE,P_SPINR(c),XR(E)::QAB1(A),XR(c)
      • R(c);N_GUARD::QAB(A)+R(E)
      • S(b);N_GUARD::S(D)
      • S(b);N_GUARD::S(D),XS(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).