MESON Chess Problem Database

Problem Display
PID: 229942 (8/8/1n1pNn2/1P1k1Pp1/3P4/3P3p/K1P1P1r1/7Q w - - 0 1)

Bottger, Horst

Freie Presse, 1972

8/8/1n1pNn2/1P1k1Pp1/3P4/3P3p/K1P1P1r1/7Q

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.c4#
    • 1...Sbd7
      • 2.c4#
    • 1...Sa8
      • 2.c4#
    • 1...Sc8
      • 2.c4#
    • 1...Sg4
      • 2.e4#
    • 1...Sh5
      • 2.e4#
    • 1...Sfd7
      • 2.e4#
    • 1...Sh7
      • 2.e4#
    • 1...Se8
      • 2.e4#
    • 1...Sg8
      • 2.e4#
  • Tries
    • 1.Qxg2+?
      • 1...Se4
        • 2.Qxe4#
      • 1...hxg2!
    • 1.c3?
      • threat
        • 2.Sc7#
      • 1...Sa8
        • 2.c4#
      • 1...Se8!
    • 1.e3?
      • threat
        • 2.Sc7#
      • 1...Se8
        • 2.e4#
      • 1...Sa8!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sc7#
      • 1...Sa8
        • 2.c4#
      • 1...Se8
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • S(e);N_GUARD::P(C)
    • S(g);N_GUARD::P(D)
  • Tries
    • Try
      • Q(A);CHECK,XR(a)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAB1(A),XS(g)
      • Refutation
        • P(b);XQ(A)
    • Try
      • P(C);P_SPINP(D)
      • Threat
        • S(I)
      • Vars
        • S(e);N_GUARD::P(C)
      • Refutation
        • S(g);
    • Try
      • P(D);P_SPINP(C)
      • Threat
        • S(I)
      • Vars
        • S(g);N_GUARD::P(D)
      • Refutation
        • S(e);
  • Actual
    • Q(A);N_PINR(a)
    • Threat
      • S(I)
    • Vars
      • S(e);N_GUARD::P(C)
      • S(g);N_GUARD::P(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).