MESON Chess Problem Database

Problem Display
PID: 227753 (7Q/7n/6Pk/6nP/6K1/8/8/8 w - - 0 1)

Goldschmidt, Ervin

Magyar Sakkvilag, 1926

7Q/7n/6Pk/6nP/6K1/8/8/8

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qxh7#
    • 1...Sh3
      • 2.Qxh7#
    • 1...Se4
      • 2.Qxh7#
    • 1...Se6
      • 2.Qxh7#
    • 1...Sf7
      • 2.Qxh7#
  • Tries
    • 1.Kh4?
      • 1...Sh3
        • 2.Qxh7#
      • 1...Se4
        • 2.Qxh7#
      • 1...Se6
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sf3+!
    • 1.Kf5?
      • 1...Sf3
        • 2.Qxh7#
      • 1...Sh3
        • 2.Qxh7#
      • 1...Se4
        • 2.Qxh7#
      • 1...Se6
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Kxh5!
    • 1.Qg8?
      • 1...Sf3
        • 2.Qxh7#
      • 1...Sh3
        • 2.Qxh7#
      • 1...Se4
        • 2.Qxh7#
      • 1...Se6
        • 2.Qxh7#
      • 1...Sf7
        • 2.Qxh7#
      • 1...Sf8
        • 2.Qxf8#
      • 1...Sf6+!
  • Keys
    • 1.g7!
      • threat
        • 2.g8S#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAR1(D),XS(c)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAR1(D),XS(c)
      • Refutation
        • S(a);CHECK
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAR1(D),XS(c)
      • Refutation
        • K(b);P-FLIGHT,XP(B)
    • Try
      • Q(D);N_PINS(c)
      • Vars
        • S(a);N_GUARD::QAR1(D),XS(c)
        • S(c);N_GUARD::QAB(D),XS(c)
      • Refutation
        • S(c);CHECK
  • Actual
    • P(C);
    • Threat
      • P=S
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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).