MESON Chess Problem Database

Problem Display
PID: 176068 (1N5q/4B3/b7/Pk2N1R1/pp4p1/3p4/3KP3/4Q3 w - - 0 1)

Ederer, Alois

Schach-Echo, 1936

1N5q/4B3/b7/Pk2N1R1/pp4p1/3p4/3KP3/4Q3

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa5
      • 2.Sc4#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qxb4#
      • 1...Kxa5
        • 2.Sc4#
        • 2.Qxb4#
      • 1...b3!
  • Keys
    • 1.Kxd3!
      • threat
        • 2.Qxb4#
      • 1...Kxa5+
        • 2.Sc4#
      • 1...Qh3+
        • 2.Sf3#
      • 1...Qh7+
        • 2.Sg6#
      • 1...Qd8+
        • 2.Sed7#
      • 1...b3
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT,XP(D)::R(F)+S(E),DCHECK
  • Tries
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAR1(A),XP(c)
      • Refutation
        • P(c);
  • Actual
    • K(B);P-FLIGHT,XP(a)
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINP(c),XP(D)::R(F)+S(E),DCHECK
      • Q(g);CHECK,N_GUARD::R(F)+S(E)
      • P(c);::QAR1(A)
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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).