MESON Chess Problem Database

Problem Display
PID: 17748 (8/2Q3N1/1n3pp1/4p3/2n1Nk1P/3R1P1R/b3P3/2b4K w - - 0 1)

Brehmer, Siegfried

7th HM., German Ring Ty., 1949

8/2Q3N1/1n3pp1/4p3/2n1Nk1P/3R1P1R/b3P3/2b4K

#2

9 + 8

3691 100 und ein Schachproblem von Siegfried Brehmer 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qxc1#
    • 1...Sd2
      • 2.e3#
    • 1...Sa3
      • 2.Qxc1#
    • 1...Sa5
      • 2.Qxc1#
    • 1...Sd6
      • 2.Qxc1#
    • 1...f5
      • 2.Se6#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Se6#
      • 1...Sb2
        • 2.Qxc1#
      • 1...Sa3
        • 2.Qxc1#
      • 1...Se3
        • 2.Rd4#
      • 1...Sa5
        • 2.Qxc1#
      • 1...Sd6
        • 2.Qxc1#
      • 1...Sd2!
    • 1.Sd6?
      • threat
        • 2.Se6#
      • 1...Sxd6
        • 2.Qxc1#
      • 1...e4
        • 2.Sxc4#
      • 1...Sb2
        • 2.Qxc1#
      • 1...Sd2
        • 2.e3#
      • 1...Sa3
        • 2.Qxc1#
      • 1...Sa5
        • 2.Qxc1#
      • 1...Se3!
    • 1.Rg3?
      • threat
        • 2.Rg4#
      • 1...f5
        • 2.Se6#
      • 1...Se3!
  • Keys
    • 1.Sg5!
      • threat
        • 2.S5e6#
      • 1...fxg5
        • 2.Qf7#
      • 1...Sb2
        • 2.Qxc1#
      • 1...Sd2
        • 2.e3#
      • 1...Sa3
        • 2.Qxc1#
      • 1...Se3
        • 2.Rd4#
      • 1...Sa5
        • 2.Qxc1#
      • 1...Sd6
        • 2.Qxc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(c);OGATE::QAB(H),XB(a)
    • S(c);N_GUARD,S_CUTB(a)::P(B)
    • S(c);N_SPINP(e),OGATE::QAB(H),XB(a)
    • P(g);SBLOCK::S(I)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(I)
      • Vars
        • S(c);OGATE::QAB(H),XB(a)
        • S(c);SBLOCK::R(C)
        • S(c);N_SPINP(e),OGATE::QAB(H),XB(a)
      • Refutation
        • S(c);
    • Try
      • S(F);N_PINP(e)
      • Threat
        • S(I)
      • Vars
        • S(c);OGATE,XS(F)::QAB(H),XB(a)
        • P(e);::QAB(H)+S(F),XS(c)
        • S(c);OGATE::QAB(H),XB(a)
        • S(c);N_GUARD,S_CUTB(a)::P(B)
      • Refutation
        • S(c);
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • P(g);SBLOCK::S(I)
      • Refutation
        • S(c);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • P(g);OGATEB,XS(F)::QAR(H)
      • S(c);OGATE::QAB(H),XB(a)
      • S(c);N_GUARD,S_CUTB(a)::P(B)
      • S(c);SBLOCK::R(C)
      • S(c);N_SPINP(e),OGATE::QAB(H),XB(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).