MESON Chess Problem Database

Problem Display
PID: 66766 (q1r4k/1rb3p1/pp1pQ1K1/8/8/8/8/8 w - - 0 1)

Hoffmann, Martin Wolfgang

Die Schwalbe, 1987

q1r4k/1rb3p1/pp1pQ1K1/8/8/8/8/8

#2

2 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Qh3#
    • 1...Bb8
      • 2.Qxc8#
    • 1...Bd8
      • 2.Qe8#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Rg8
        • 2.Qh4#
      • 1...Bd8
        • 2.Qf8#
        • 2.Qe8#
      • 1...Bb8!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Rg8
        • 2.Qh3#
      • 1...Bb8
        • 2.Qxc8#
      • 1...Bd8
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(h);SBLOCK::QAR(A)
    • B(e);N_GUARD,S_CUTQ(g)::QAR(A),XR(h)
    • B(e);S_CUTR(h)::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(f)
      • Vars
        • K(i);P-FLIGHT::QAR1(A),XP(f)
        • R(h);SBLOCK::QAR(A)
      • Refutation
        • B(e);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(f)
    • Vars
      • K(i);P-FLIGHT::QAR1(A),XP(f)
      • R(h);SBLOCK::QAR(A)
      • B(e);N_GUARD,S_CUTQ(g)::QAR(A),XR(h)
      • B(e);S_CUTR(h)::QAR(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).