MESON Chess Problem Database

Problem Display
PID: 231098 (8/8/8/4K1N1/8/3pk3/4n3/3BQ3 w - - 0 1)

Goldschmidt, Ervin

Magyar Sakkvilag, 1927

8/8/8/4K1N1/8/3pk3/4n3/3BQ3

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Qxe2#
  • Tries
    • 1.Sf3?
      • 1...d2
        • 2.Qxe2#
      • 1...Kxf3!
    • 1.Sh3?
      • 1...d2
        • 2.Qxe2#
      • 1...Kf3!
    • 1.Se6?
      • 1...d2
        • 2.Qxe2#
      • 1...Kf3!
    • 1.Sf7?
      • 1...d2
        • 2.Qxe2#
      • 1...Kf3!
    • 1.Sh7?
      • 1...d2
        • 2.Qxe2#
      • 1...Kf3!
    • 1.Qf1?
      • 1...d2
        • 2.Qxe2#
        • 2.Qf3#
      • 1...Sc1
        • 2.Qf4#
      • 1...Sg1
        • 2.Qf4#
      • 1...Sc3
        • 2.Qf4#
      • 1...Sg3
        • 2.Qf4#
      • 1...Sd4
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Kd2!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qf2#
      • 1...Kf3
        • 2.Qg3#
      • 1...d2
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR1(B),XS(a)
  • Tries
    • Try
      • S(D);
      • Vars
        • P(b);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(c);P-FLIGHT,XS(D)
    • Try
      • S(D);
      • Vars
        • P(b);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • P(b);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • P(b);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • P(b);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);N_PINS(a)
      • Vars
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB1(B)
    • Vars
      • K(c);P-FLIGHT::QAR1(B)
      • P(b);N_GUARD::QAR1(B),XS(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).