MESON Chess Problem Database

Problem Display
PID: 93930 (6QK/2n1p2p/8/4r2k/6p1/6n1/7P/4r2R w - - 0 1)

Janek, Rudolf J

Cesky denik, 1945

6QK/2n1p2p/8/4r2k/6p1/6n1/7P/4r2R

#2

4 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...R1e3
      • 2.hxg3#
    • 1...R1e4
      • 2.hxg3#
    • 1...Rg5
      • 2.Qxh7#
  • Keys
    • 1.h4!
      • threat
        • 2.Qxh7#
      • 1...Kh6
        • 2.Qxh7#
      • 1...gxh4 ep
        • 2.Rxh3#
      • 1...Re6
        • 2.Qg5#
      • 1...Sf5
        • 2.Qg5#
      • 1...h6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::R(A)+P(B),XS(b)
    • R(d);SBLOCK::QAR2(C),XP(h)
  • Actual
    • P(B);
    • Threat
      • QAR2(C),XP(h)
    • Vars
      • K(e);P-FLIGHT::QAR1(C),XP(h)
      • P(c);EP,OGATEB,P_SPINP(c),XP(B)::R(A),XP(c)
      • R(d);N_GUARD::QAR1(C)
      • S(b);S_CUTR(d)::QAR1(C)
      • P(h);SBLOCK::QAB(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).