MESON Chess Problem Database

Problem Display
PID: 82258 (4Nn2/4KP2/6p1/3Pkp1b/R4p2/8/1N1R2n1/7Q w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1984

4Nn2/4KP2/6p1/3Pkp1b/R4p2/8/1N1R2n1/7Q

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qh8#
    • 1...Be2
      • 2.Qh8#
    • 1...Bf3
      • 2.Qh8#
    • 1...Bg4
      • 2.Qh8#
    • 1...Se1
      • 2.Sc4#
    • 1...Se3
      • 2.Sd3#
    • 1...Sh4
      • 2.Sd3#
      • 2.Sc4#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sbc4#
      • 1...Be2
        • 2.Qh8#
      • 1...Se3
        • 2.Sd3#
      • 1...f3!
    • 1.Sf6?
      • threat
        • 2.Sd3#
        • 2.Sc4#
      • 1...f3
        • 2.Sd3#
      • 1...Se1
        • 2.Sc4#
      • 1...Se3
        • 2.Sd3#
      • 1...Be2!
    • 1.Rdd4?
      • threat
        • 2.Sd3#
      • 1...Be2
        • 2.Qh8#
      • 1...Se1!
    • 1.Rad4?
      • threat
        • 2.Sc4#
      • 1...Be2
        • 2.Qh8#
      • 1...Se3!
    • 1.Qa1?
      • threat
        • 2.Sd1#
      • 1...Bd1
        • 2.Sxd1#
      • 1...Se6!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Sd3#
      • 1...Be2
        • 2.Qh8#
      • 1...Se1
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • B(e);OGATE::QAB(A)
    • S(a);::S(B)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(B)
      • Vars
        • B(e);OGATE::QAB(A)
        • S(a);::S(B)
      • Refutation
        • P(b);
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::S(B)
        • S(a);::S(B)
      • Refutation
        • B(e);
    • Try
      • R(C);
      • Threat
        • S(B)
      • Vars
        • B(e);OGATE::QAB(A)
      • Refutation
        • S(a);
    • Try
      • R(D);
      • Threat
        • S(B)
      • Vars
        • B(e);OGATE::QAB(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAB(A)+S(B)
      • Vars
        • B(e);::QAB(A)+S(B),XB(e)
      • Refutation
        • S(g);
  • Actual
    • S(H);
    • Threat
      • S(B)
    • Vars
      • B(e);OGATE::QAB(A)
      • S(a);::S(B)
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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).