MESON Chess Problem Database

Problem Display
PID: 221070 (8/8/8/1Q6/8/K1Pn4/p7/kb6 w - - 0 1)

Ernst, Erich

Badische Neueste Nachrichten, 1991

8/8/8/1Q6/8/K1Pn4/p7/kb6

#2

3 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qb2#
    • 1...Se1
      • 2.Qb2#
    • 1...Sb2
      • 2.Qxb2#
    • 1...Sf2
      • 2.Qb2#
    • 1...Sf4
      • 2.Qb2#
    • 1...Sc5
      • 2.Qb2#
    • 1...Se5
      • 2.Qb2#
  • Tries
    • 1.c4?
      • 1...Sc1
        • 2.Qb2#
        • 2.Qe5#
      • 1...Se1
        • 2.Qb2#
        • 2.Qe5#
      • 1...Sb2
        • 2.Qxb2#
      • 1...Sf2
        • 2.Qb2#
        • 2.Qe5#
      • 1...Sb4
        • 2.Qe5#
      • 1...Sf4
        • 2.Qb2#
        • 2.Qe5#
      • 1...Sc5
        • 2.Qb2#
      • 1...Se5
        • 2.Qb2#
        • 2.Qxe5#
      • 1...Bc2!
  • Keys
    • 1.Qb3!
      • 1...Sc1
        • 2.Qb2#
      • 1...Bc2
        • 2.Qxa2#
      • 1...Se1
        • 2.Qb2#
      • 1...Sb2
        • 2.Qxb2#
      • 1...Sf2
        • 2.Qb2#
      • 1...Sb4
        • 2.Qb2#
      • 1...Sf4
        • 2.Qb2#
      • 1...Sc5
        • 2.Qb2#
      • 1...Se5
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD::QAB1(C)
    • S(d);N_GUARD::QAB1(C),XS(d)
  • Tries
    • Try
      • P(B);
      • Vars
        • S(d);N_GUARD::QAB1(C),XS(d)
        • S(d);N_GUARD::QAB(C)
        • S(d);N_GUARD::QAB1(C)
      • Refutation
        • B(b);
  • Actual
    • Q(C);
    • Vars
      • S(d);N_GUARD::QAB1(C)
      • B(b);N_GUARD::QAR1(C),XP(c)
      • S(d);N_GUARD::QAB1(C),XS(d)
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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).