MESON Chess Problem Database

Problem Display
PID: 81936 (7N/2n1N1b1/7p/1Q2P2k/4p2P/2n3K1/8/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1949

7N/2n1N1b1/7p/1Q2P2k/4p2P/2n3K1/8/8

#2

6 + 6

6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5+
      • 2.Qxe5#
    • 1...Sb1
      • 2.Qe2#
    • 1...Sd1
      • 2.Qe2#
    • 1...Sa2
      • 2.Qe2#
    • 1...Se2+
      • 2.Qxe2#
    • 1...Sa4
      • 2.Qe2#
    • 1...S3d5
      • 2.Qe2#
    • 1...S7d5
      • 2.Qe8#
    • 1...Sa6
      • 2.Qe8#
    • 1...Se6
      • 2.Qe8#
    • 1...Sa8
      • 2.Qe8#
    • 1...Se8
      • 2.Qxe8#
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sf4#
      • 1...Se2+
        • 2.Qxe2#
      • 1...S3xd5
        • 2.Qe2#
      • 1...S7xd5
        • 2.Qe8#
      • 1...Se6
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • B(f);CHECK,OGATE,P_SPINB(f),XP(D)::QAR(C),XB(f)
    • S(a);N_GUARD::QAB(C)
    • S(a);CHECK,N_GUARD::QAB(C),XS(a)
    • S(e);N_GUARD::QAB(C)
    • S(e);N_GUARD,SBLOCK::QAB(C)
    • S(e);N_GUARD::QAB(C),XS(e)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • S(a);CHECK,N_GUARD::QAB(C),XS(a)
      • S(a);N_GUARD,XS(E)::QAB(C)
      • S(e);N_GUARD,XS(E)::QAB(C)
      • S(e);N_GUARD::QAB(C)
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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).