MESON Chess Problem Database

Problem Display
PID: 99665 (8/8/8/3Q4/1k1Pn3/1P6/8/1R2K3 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

8/8/8/3Q4/1k1Pn3/1P6/8/1R2K3

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Qa5#
    • 1...Kc3
      • 2.Qc4#
    • 1...Sd2
      • 2.Qc5#
    • 1...Sf2
      • 2.Qc5#
    • 1...Sc3
      • 2.Qc5#
    • 1...Sg3
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sg5
      • 2.Qc5#
    • 1...Sd6
      • 2.Qc5#
    • 1...Sf6
      • 2.Qc5#
  • Tries
    • 1.Qc4+?
      • 1...Ka3
        • 2.Qa4#
      • 1...Ka5!
    • 1.Qb5+?
      • 1...Ka3
        • 2.Qa4#
        • 2.Qa5#
      • 1...Kc3
        • 2.Qc4#
      • 1...Kxb5!
    • 1.Qe5?
      • 1...Ka3
        • 2.Qa5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sf2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sg3
        • 2.Qc5#
      • 1...Sg5
        • 2.Qc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sf6
        • 2.Qc5#
      • 1...Kc3!
    • 1.Qf5?
      • 1...Ka3
        • 2.Qa5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sf2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sg3
        • 2.Qc5#
      • 1...Sg5
        • 2.Qc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sf6
        • 2.Qc5#
      • 1...Kc3!
  • Keys
    • 1.Qc6!
      • 1...Ka3
        • 2.Qa4#
      • 1...Ka5
        • 2.b4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sf2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sg3
        • 2.Qc5#
      • 1...Sg5
        • 2.Qc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sf6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAR2(E)
    • K(a);S_FLIGHT::QAR1(E)
    • S(b);N_GUARD::QAB1(E)
    • S(b);N_GUARD::QAB1(E),XS(b)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
        • S(b);N_GUARD::QAB1(E),XS(b)
        • S(b);N_GUARD::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
        • S(b);N_GUARD::QAB1(E),XS(b)
        • S(b);N_GUARD::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);OGATE,S_FLIGHT::P(C)
      • S(b);N_GUARD::QAB1(E),XS(b)
      • S(b);N_GUARD::QAB1(E)
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).