MESON Chess Problem Database

Problem Display
PID: 42917 (3Q1R2/2n5/1q2N1p1/4k3/2RNn1P1/B5p1/1p6/1B4K1 w - - 0 1)

Schoen, Gerhard Ernst

Basselandschaftliche Zeitung, 1978

3Q1R2/2n5/1q2N1p1/4k3/2RNn1P1/B5p1/1p6/1B4K1

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Sf3#
    • 1...Sd2
      • 2.Qg5#
    • 1...Sf2
      • 2.Qg5#
    • 1...Sc3
      • 2.Qg5#
    • 1...Sg5
      • 2.Qxg5#
    • 1...g5
      • 2.Rf5#
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sd3#
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Sf6
        • 2.Sxg6#
      • 1...Qb3
        • 2.Sc6#
        • 2.Sxg6#
      • 1...Qd6
        • 2.Sf3#
      • 1...Sd2
        • 2.Qg5#
      • 1...Sf2
        • 2.Sf3#
        • 2.Qg5#
      • 1...Sc3
        • 2.Qg5#
      • 1...Sc5
        • 2.Sf3#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_PINS(E),SBLOCK,XS(G)::S(E)
    • S(c);N_GUARD::QAR2(H)
    • S(c);N_GUARD,N_PINS(E)::QAR2(H)
    • S(c);N_GUARD::QAR2(H),XS(c)
    • P(f);N_GUARD::R1(I)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(e);CHECK,OGATE,XS(E)::QAB1(H),XQ(e)
      • S(c);S_CUTQ(e)::S(G),XP(f)
      • Q(e);N_PINS(E)::S(E)
      • S(c);N_GUARD::QAR2(H)
      • S(c);N_PINS(E)::S(E)
      • S(c);N_GUARD::QAR2(H),XS(c)
      • S(c);N_GUARD,S_CUTQ(e)::QAB1(H)
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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).