MESON Chess Problem Database

Problem Display
PID: 157407 (n1b3BK/8/2p2p2/QpN1kN1R/6R1/5q2/5p2/b2nr3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1955

n1b3BK/8/2p2p2/QpN1kN1R/6R1/5q2/5p2/b2nr3

#2

7 + 11

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Sd3#
    • 1...Qg2
      • 2.Sd3#
    • 1...Qd3
      • 2.Sxd3#
    • 1...Ba6
      • 2.Sd7#
    • 1...Bb7
      • 2.Sd7#
    • 1...Bd7
      • 2.Sxd7#
    • 1...Se3
      • 2.Sd3#
    • 1...Sc7
      • 2.Qxc7#
    • 1...b4
      • 2.Sd3#
      • 2.Sd7#
  • Tries
    • 1.Qd8?
      • threat
        • 2.Qd6#
      • 1...Qxf5
        • 2.Sd3#
      • 1...Bxf5
        • 2.Qe7#
      • 1...Qd3
        • 2.Sxd3#
      • 1...Bd7
        • 2.Sxd7#
      • 1...Qd5!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qd6#
      • 1...Qxf5
        • 2.Qf4#
      • 1...Bxf5
        • 2.Sd7#
      • 1...Qd5
        • 2.Qf4#
      • 1...Qd3
        • 2.Sxd3#
        • 2.Qf4#
      • 1...Bd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(e);N_GUARD,P_PINR(E)::S(C)
    • Q(e);N_GUARD::S(C)
    • Q(e);N_GUARD::S(C),XQ(e)
    • B(k);N_GUARD::S(C)
    • B(k);N_GUARD::S(C),XB(k)
    • S(b);S_CUTQ(e)::S(C)
    • S(j);N_GUARD::QAB(B),XS(j)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e),XS(D)::S(C)
        • B(k);N_GUARD,P_SPINB(k),XS(D)::QAR2(B)
        • Q(e);N_GUARD::S(C),XQ(e)
        • B(k);N_GUARD::S(C),XB(k)
      • Refutation
        • Q(e);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • Q(e);N_GUARD,P_SPINQ(e),XS(D)::QAB1(B)
      • B(k);N_GUARD,P_SPINB(k),XS(D)::S(C)
      • Q(e);N_GUARD::QAB1(B)
      • B(a);N_GUARD::QAB1(B),XB(a)
HTML5 logo

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).