MESON Chess Problem Database

Problem Display
PID: 91731 (8/7K/8/4P1k1/3P3n/4N2R/5n2/2Q2R2 w - - 0 1)

Niemeijer, Meindert

Probleemblad, 1961

8/7K/8/4P1k1/3P3n/4N2R/5n2/2Q2R2

#2

7 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rxf2?
      • 1...Kh5
        • 2.Rf5#
      • 1...Sg2
        • 2.Rf5#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sg6
        • 2.Rf5#
        • 2.Qg1#
      • 1...Sf3!
  • Keys
    • 1.Qc8!
      • 1...Kf4
        • 2.Qg4#
      • 1...Kh5
        • 2.Qf5#
      • 1...Sxh3
        • 2.Qg4#
      • 1...Sd1
        • 2.Qg4#
      • 1...Sh1
        • 2.Qg4#
      • 1...Sd3
        • 2.Qg4#
      • 1...Se4
        • 2.Qg4#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Sg2
        • 2.Qf5#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sg6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);XS(a)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R(B)
        • S(b);N_GUARD::R1(B)
        • S(b);N_GUARD::R1(B),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINS(a),S_FLIGHT::QAR1(A)
      • K(c);P-FLIGHT,P_SPINS(b)::QAR2(A)
      • S(a);N_GUARD,XR(D)::QAR1(A)
      • S(a);N_GUARD::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
      • S(b);N_GUARD::QAR1(A)
      • S(b);N_GUARD::QAR1(A),XS(b)
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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).