MESON Chess Problem Database

Problem Display
PID: 226888 (4Q1br/2N1Pp1n/3P1k2/4p3/7N/r1p1B1K1/qb6/8 w - - 0 1)

Nemo, Ottmar (Weiss, Ottmar)

Die Schwalbe, 1928

4Q1br/2N1Pp1n/3P1k2/4p3/7N/r1p1B1K1/qb6/8

#2

7 + 10

SOLUTION

  • SOUND
  • Tries
    • 1.Qb5?
      • threat
        • 2.e8S#
      • 1...Kg7
        • 2.Se8#
      • 1...Qe6
        • 2.Se8#
      • 1...Ra8!
    • 1.Qb8?
      • threat
        • 2.e8S#
      • 1...Kg7
        • 2.Se8#
      • 1...Qe6
        • 2.Se8#
      • 1...e4!
    • 1.Qc8?
      • threat
        • 2.Se8#
        • 2.e8S#
      • 1...Kg7
        • 2.Se8#
      • 1...Qe6
        • 2.Se8#
      • 1...e4!
    • 1.Qd8?
      • threat
        • 2.e8S#
      • 1...Kg7
        • 2.Se8#
      • 1...e4!
    • 1.Qf8?
      • threat
        • 2.Qh6#
        • 2.e8S#
      • 1...Sxf8
        • 2.e8S#
      • 1...Ra8
        • 2.Qh6#
      • 1...Qb1
        • 2.e8S#
      • 1...Qe6
        • 2.Se8#
        • 2.Qh6#
      • 1...Sg5
        • 2.e8S#
      • 1...e4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.e8S#
      • 1...Kg7
        • 2.Se8#
      • 1...e4
        • 2.Qd4#
      • 1...Qe6
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);
      • Threat
        • P=S
      • Vars
        • K(f);S_FLIGHT::S(E)
        • Q(a);SBLOCK::S(E)
      • Refutation
        • R(c);
    • Try
      • Q(G);
      • Threat
        • P=S
      • Vars
        • K(f);S_FLIGHT::S(E)
        • Q(a);SBLOCK::S(E)
      • Refutation
        • P(e);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(f);S_FLIGHT::S(E)
        • Q(a);::S(E)
      • Refutation
        • P(e);
    • Try
      • Q(G);
      • Threat
        • P=S
      • Vars
        • K(f);S_FLIGHT::S(E)
      • Refutation
        • P(e);
    • Try
      • Q(G);P_PINP(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);N_SPINP(g),XQ(G)::P=S
        • R(c);::QAR2(G)
        • Q(a);::P=S
        • S(h);::P=S
      • Refutation
        • P(e);
  • Actual
    • Q(G);
    • Threat
      • P=S
    • Vars
      • K(f);S_FLIGHT::S(E)
      • P(e);OGATEB::QAB(G)
      • Q(a);SBLOCK::S(E)
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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).