MESON Chess Problem Database

Problem Display
PID: 242916 (n7/K5Qn/bPpkN3/1p2p3/8/4P3/Br6/B7 w - - 0 1)

Ulbing, Hans

Die Schwalbe, 1929

n7/K5Qn/bPpkN3/1p2p3/8/4P3/Br6/B7

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Bxe5#
    • 1...Rc2
      • 2.Bxe5#
    • 1...Rd2
      • 2.Bxe5#
    • 1...Re2
      • 2.Bxe5#
    • 1...Rf2
      • 2.Bxe5#
    • 1...Rg2
      • 2.Bxe5#
    • 1...Rh2
      • 2.Bxe5#
    • 1...Rb4
      • 2.Bxe5#
    • 1...Sxb6
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
  • Tries
    • 1.Qf8+?
      • 1...Kd7
        • 2.Sc5#
        • 2.Qd8#
      • 1...Sxf8!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Se4#
      • 1...Kxc5
        • 2.Qe7#
      • 1...Rxa2
        • 2.Qxe5#
      • 1...Rb3
        • 2.Qxe5#
      • 1...Rb4
        • 2.Qxe5#
      • 1...Sg5
        • 2.Qf8#
      • 1...Sf6
        • 2.Qf8#
      • 1...e4
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 9
  • Sets
    • R(a);OGATE::B(A),XP(c)
    • S(h);N_GUARD,XP(D)::QAB1(G)
    • S(h);N_GUARD::QAB1(G),XS(h)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • S(g);XQ(G)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(f);S_FLIGHT,XS(E)::QAB(G)
      • R(a);XB(B)::QAB1(G),XP(c)
      • R(a);::QAB1(G),XP(c)
      • S(g);N_GUARD::QAB(G)
      • P(c);::S(E),XP(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).