MESON Chess Problem Database

Problem Display
PID: 21614 (n3k2n/1N1p2K1/5p2/2B2p2/r5pb/4N3/1Q2R3/1b6 w - - 0 1)

Hartong, Jan

1st HM., Die Wochenschau, 1920

n3k2n/1N1p2K1/5p2/2B2p2/r5pb/4N3/1Q2R3/1b6

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sc2#
    • 1...Ra2
      • 2.Sc2#
    • 1...Ra5
      • 2.Sc2#
    • 1...Ra7
      • 2.Sc2#
    • 1...Ba2
      • 2.Sc4#
    • 1...d5
      • 2.Qb5#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qg8#
      • 1...d5
        • 2.Qxa4#
        • 2.Qb5#
      • 1...d6
        • 2.Qe6#
      • 1...Ba2
        • 2.Sc4#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Rc4!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qg8#
      • 1...Rxa2
        • 2.Sc2#
      • 1...Bxa2
        • 2.Sc4#
      • 1...d5
        • 2.Qxa4#
      • 1...d6
        • 2.Qe6#
      • 1...Rc4
        • 2.Qxa8#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::R(B)+S(C)
    • B(a);N_GUARD::R(B)+S(C)
    • P(g);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(g);N_GUARD::QAR2(A)
        • B(a);N_GUARD::R(B)+S(C)
        • S(j);N_GUARD::QAB1(A)
        • S(j);N_GUARD::QAB1(A),XS(j)
      • Refutation
        • R(b);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • R(b);N_GUARD,XQ(A)::R(B)+S(C)
      • B(a);N_GUARD,XQ(A)::R(B)+S(C)
      • P(g);OGATEB::QAB(A),XR(b)
      • P(g);N_GUARD::QAR2(A)
      • R(b);OGATE::QAR(A),XS(h)
      • S(j);N_GUARD::QAB1(A)
      • S(j);N_GUARD::QAB1(A),XS(j)
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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).