MESON Chess Problem Database

Problem Display
PID: 170511 (1r5k/rb4p1/p1p1Q1K1/6p1/8/8/8/8 w - - 0 1)

Hoffmann, Martin Wolfgang

Basler Nachrichten, 1972

1r5k/rb4p1/p1p1Q1K1/6p1/8/8/8/8

#2

2 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re8
      • 2.Qxe8#
    • 1...Rg8
      • 2.Qh3#
    • 1...Bc8
      • 2.Qe8#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Rg8
        • 2.Qh3#
      • 1...Bc8
        • 2.Qe8#
        • 2.Qd8#
      • 1...Ba8!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Rg8
        • 2.Qh2#
      • 1...Ba8
        • 2.Qxb8#
      • 1...Bc8
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(g);N_GUARD::QAR(A),XR(g)
    • R(g);SBLOCK::QAR(A)
    • B(e);S_CUTR(g)::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(f)
      • Vars
        • K(h);P-FLIGHT::QAR1(A),XP(f)
        • R(g);SBLOCK::QAR(A)
      • Refutation
        • B(e);
  • Actual
    • Q(A);P_PINP(f)
    • Threat
      • QAB1(A),XP(f)
    • Vars
      • K(h);N_SPINP(f),P-FLIGHT::QAR1(A),XP(f)
      • R(g);SBLOCK::QAR(A)
      • B(e);N_GUARD::QAR(A),XR(g)
      • B(e);S_CUTR(g)::QAR(A)
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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).