MESON Chess Problem Database

Problem Display
PID: 263955 (8/8/8/3Q4/3b4/3k4/3N4/3K4 w - - 0 1)

Franken, Maurits

Tijdschrift vd KNSB, 1935

8/8/8/3Q4/3b4/3k4/3N4/3K4

#2

3 + 2

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qb3#
    • 1...Ke3
      • 2.Qf3#
  • Tries
    • 1.Kc1?
      • 1...Kc3
        • 2.Qb3#
        • 2.Qc4#
      • 1...Ke3
        • 2.Qf3#
      • 1...Ke2!
    • 1.Ke1?
      • 1...Kc3
        • 2.Qb3#
      • 1...Ke3
        • 2.Qf3#
        • 2.Qe4#
      • 1...Kc2!
    • 1.Qb5+?
      • 1...Kc3
        • 2.Sb1#
        • 2.Se4#
        • 2.Qb3#
      • 1...Ke3!
    • 1.Qf5+?
      • 1...Ke3
        • 2.Sf1#
        • 2.Sc4#
        • 2.Qf3#
      • 1...Kc3!
  • Keys
    • 1.Qd6!
      • 1...Kc3
        • 2.Qa3#
      • 1...Ke3
        • 2.Qg3#

This is a version of 54278

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR1(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR1(C)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR1(C)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(C);CHECK,N_PINB(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK,N_PINB(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR2(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).