MESON Chess Problem Database

Problem Display
PID: 244389 (b5K1/5Q2/4p1N1/6k1/r6R/8/2B1N3/b3r3 w - - 0 1)

Dittrich, Stefan

Buletin Problemistic, 1977

b5K1/5Q2/4p1N1/6k1/r6R/8/2B1N3/b3r3

#2

6 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qf4#
    • 1...Ra3
      • 2.Qf4#
    • 1...Rd4
      • 2.Qe7#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Ra5
      • 2.Qf4#
    • 1...Ra6
      • 2.Qf4#
    • 1...Ra7
      • 2.Qf4#
    • 1...Bd4
      • 2.Qf4#
    • 1...e5
      • 2.Qf5#
      • 2.Qe7#
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qf4#
        • 2.Qe7#
      • 1...Rxd4
        • 2.Qe7#
      • 1...Bxd4
        • 2.Qf4#
      • 1...Rf1
        • 2.Sxe6#
      • 1...Re4
        • 2.Sf3#
      • 1...Ra7
        • 2.Qf4#
      • 1...Be4
        • 2.Sxe6#
      • 1...e5
        • 2.Se6#
        • 2.Qf5#
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::QAB1(E)
    • R(c);S_CUTB(a)::QAB(E)
    • R(c);N_GUARD::QAB1(E),XR(c)
    • B(a);S_CUTR(c)::QAB1(E)
  • Actual
    • S(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);XS(B)::QAB(E)
      • B(a);XS(B)::QAB1(E)
      • R(b);N_GUARD::S(B),XP(e)
      • R(b);S_CUTB(f)::S(B)
      • R(c);::QAB1(E)
      • B(f);S_CUTR(b)::S(B),XP(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).