MESON Chess Problem Database

Problem Display
PID: 82188 (3Nn2b/p3Q1nB/2Kp3N/7p/2pkP3/2p5/2P5/2B5 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Tidskrift for Schack, 1976

3Nn2b/p3Q1nB/2Kp3N/7p/2pkP3/2p5/2P5/2B5

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Sxf5#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sc7
      • 2.Qf6#
  • Tries
    • 1.Shf7?
      • threat
        • 2.Qxa7#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sc7
        • 2.Qf6#
      • 1...a5
        • 2.Qa7#
      • 1...a6
        • 2.Qa7#
      • 1...Sf5!
    • 1.Se6+?
      • 1...Ke5
        • 2.Sf7#
        • 2.Bf4#
      • 1...Sxe6!
    • 1.Sdf7?
      • threat
        • 2.Qxa7#
      • 1...Sf5
        • 2.Sxf5#
      • 1...Sc7
        • 2.Qf6#
      • 1...a5
        • 2.Qa7#
      • 1...a6
        • 2.Qa7#
      • 1...Se6!
    • 1.Qg5?
      • threat
        • 2.Be3#
        • 2.Qd5#
      • 1...Sf6
        • 2.Be3#
        • 2.Qxf6#
      • 1...Sc7
        • 2.Be3#
        • 2.Qf6#
      • 1...d5
        • 2.Be3#
        • 2.Qxd5#
      • 1...Sf5!
    • 1.Qe6?
      • threat
        • 2.Qd5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sc7
        • 2.Qf6#
      • 1...d5
        • 2.Qxd5#
      • 1...Sxe6!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Qxa7#
      • 1...Sf5
        • 2.Sxf5#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sc7
        • 2.Qf6#
      • 1...a5
        • 2.Qa7#
      • 1...a6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(g);N_GUARD::S(E),XS(g)
    • S(h);N_GUARD::QAB(F),XS(h)
    • S(h);N_GUARD::QAB(F)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB(F),XP(f)
      • Vars
        • S(g);N_GUARD::S(H),XS(g)
        • S(h);N_GUARD::QAB(F)
        • P(f);::QAB(F)
      • Refutation
        • S(g);
    • Try
      • S(H);CHECK
      • Refutation
        • S(g);XS(H)
    • Try
      • S(H);
      • Threat
        • QAB(F),XP(f)
      • Vars
        • S(g);N_GUARD::S(E),XS(g)
        • S(h);N_GUARD::QAB(F)
        • P(f);::QAB(F)
      • Refutation
        • S(g);
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Refutation
        • S(g);
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • S(h);N_GUARD::QAB(F),XS(h)
        • S(h);N_GUARD::QAB(F)
        • P(e);::QAR1(F),XP(e)
      • Refutation
        • S(g);XQ(F)
  • Actual
    • B(A);
    • Threat
      • QAB(F),XP(f)
    • Vars
      • S(g);N_GUARD::S(E),XS(g)
      • S(g);N_GUARD::S(H),XS(g)
      • S(h);N_GUARD::QAB(F)
      • P(f);::QAB(F)
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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).