MESON Chess Problem Database

Problem Display
PID: 231630 (4K1kr/3Q4/7n/8/8/8/8/8 w - - 0 1)

Torngren, Pehr Hendrik

Tidskrift for Schack, 1927

4K1kr/3Q4/7n/8/8/8/8/8

#2

2 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Qf7#
    • 1...Sf5
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
  • Tries
    • 1.Qa7?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg4
        • 2.Qf7#
      • 1...Sf5
        • 2.Qf7#
      • 1...Rh7!
    • 1.Qb7?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg4
        • 2.Qf7#
      • 1...Sf5
        • 2.Qf7#
      • 1...Rh7!
    • 1.Qc7?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg4
        • 2.Qf7#
      • 1...Sf5
        • 2.Qf7#
      • 1...Rh7!
  • Keys
    • 1.Qe7!
      • 1...Rh7
        • 2.Qf8#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg4
        • 2.Qf7#
      • 1...Sf5
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • R(c);
  • Actual
    • Q(A);
    • Vars
      • R(c);SBLOCK::QAR1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(a);N_GUARD::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).