MESON Chess Problem Database

Problem Display
PID: 71353 (1K6/8/8/Rn6/1Bk2N2/1n6/Q1N5/8 w - - 0 1)

Boros, Sandor

Sp. Prize, Chemnitzer Wochenschach (Allgemeine Zeitung Chemnitz), 1926

1K6/8/8/Rn6/1Bk2N2/1n6/Q1N5/8

#2

6 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Rc5#
    • 1...Sc3
      • 2.Rc5#
    • 1...Sd4
      • 2.Rc5#
    • 1...Sd6
      • 2.Rc5#
    • 1...Sa7
      • 2.Rc5#
    • 1...Sc7
      • 2.Rc5#
  • Tries
    • 1.Kb7?
      • 1...Sa3
        • 2.Rc5#
      • 1...Sc3
        • 2.Rc5#
      • 1...Sd4
        • 2.Rc5#
      • 1...Sa7
        • 2.Rc5#
      • 1...Sc7
        • 2.Rc5#
      • 1...Sd6+!
    • 1.Ka8?
      • 1...Sa3
        • 2.Rc5#
      • 1...Sc3
        • 2.Rc5#
      • 1...Sd4
        • 2.Rc5#
      • 1...Sd6
        • 2.Rc5#
      • 1...Sa7
        • 2.Rc5#
      • 1...Sc7+!
  • Keys
    • 1.Qb2!
      • 1...Sxa5
        • 2.Se3#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sa1
        • 2.Se3#
      • 1...Sc1
        • 2.Se3#
      • 1...Sd2
        • 2.Se3#
      • 1...S3d4
        • 2.Se3#
      • 1...Sc5
        • 2.Se3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...S5d4
        • 2.Qc3#
      • 1...Sd6
        • 2.Qc3#
      • 1...Sa7
        • 2.Qc3#
      • 1...Sc7
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 6
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE::R1(E)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • S(c);OGATE::R1(E)
      • Refutation
        • S(c);CHECK
    • Try
      • K(F);P-FLIGHT
      • Vars
        • S(c);OGATE::R1(E)
      • Refutation
        • S(c);CHECK
  • Actual
    • Q(A);N_PINS(a)
    • Vars
      • S(a);XR(E)::S(B)
      • S(c);N_GUARD::QAR1(A)
      • S(a);::S(B)
      • S(c);N_GUARD::QAR1(A),XS(c)
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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).