MESON Chess Problem Database

Problem Display
PID: 247264 (5b2/Kb1p4/p2rp3/2Q1R2B/N1p3N1/2Bk4/1Pn4p/6q1 w - - 0 1)

Otto, Max

Die Schwalbe, 1929

5b2/Kb1p4/p2rp3/2Q1R2B/N1p3N1/2Bk4/1Pn4p/6q1

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Sxf2#
    • 1...Qxc5+
      • 2.Sxc5#
    • 1...Qa1
      • 2.Sf2#
    • 1...Qb1
      • 2.Sf2#
    • 1...Qc1
      • 2.Sf2#
    • 1...Qd1
      • 2.Sf2#
    • 1...Qh1
      • 2.Sf2#
    • 1...Rd5
      • 2.Bg6#
    • 1...Rc6
      • 2.Bg6#
    • 1...Bc8
      • 2.Bg6#
  • Keys
    • 1.Qf2!
      • threat
        • 2.Sc5#
      • 1...Qxf2+
        • 2.Sxf2#
      • 1...Rd4
        • 2.Qd2#
        • 2.Qe2#
      • 1...Rd5
        • 2.Bg6#
      • 1...Rb6
        • 2.Qd2#
        • 2.Qe2#
      • 1...Rc6
        • 2.Bg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::S(D),XQ(a)
    • Q(a);CHECK,XQ(E)::S(C),XQ(a)
    • Q(a);N_GUARD,N_PINQ(E)::S(D)
    • R(g);S_CUTB(i)::B(G)
    • B(i);N_GUARD::B(G)
  • Actual
    • Q(E);
    • Threat
      • S(C)
    • Vars
      • Q(a);CHECK,XQ(E)::S(D),XQ(a)
      • R(g);S_CUTB(i)::B(G)
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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).