MESON Chess Problem Database

Problem Display
PID: 190184 (4Q1bb/7p/1n1p4/3k4/1P2R1nr/8/K1N1P3/8 w - - 0 1)

Janet, Frank

Richmond Advance, 1913

4Q1bb/7p/1n1p4/3k4/1P2R1nr/8/K1N1P3/8

#2

6 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Rxd4#
    • 1...Sf2
      • 2.Se3#
    • 1...Sh2
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sf6
      • 2.Se3#
    • 1...Sh6
      • 2.Se3#
    • 1...Sa4
      • 2.Qa8#
    • 1...Sc4
      • 2.Qa8#
    • 1...Sd7
      • 2.Qa8#
    • 1...Sa8
      • 2.Qxa8#
  • Tries
    • 1.Rf4?
      • threat
        • 2.Qe4#
      • 1...Be6
        • 2.Qb5#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Sf2
        • 2.Se3#
      • 1...Se5
        • 2.Se3#
      • 1...Sf6
        • 2.Se3#
      • 1...Be5!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qe4#
      • 1...Kxc4
        • 2.Qc6#
      • 1...Sxc4
        • 2.e4#
      • 1...Be6
        • 2.Qb5#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Be5
        • 2.Qxg8#
      • 1...Sf2
        • 2.Se3#
      • 1...Sh2
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Se5
        • 2.Se3#
      • 1...Sf6
        • 2.Se3#
      • 1...Sh6
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(h);N_GUARD::R1(E),XB(h)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • S(d);N_GUARD::QAB(F)
    • S(d);N_GUARD::QAB(F),XS(d)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAB1(F)
      • Vars
        • B(g);SBLOCK::QAR2(F)
        • B(h);N_GUARD::R1(E),XB(h)
        • S(a);N_GUARD::S(B)
      • Refutation
        • B(h);
  • Actual
    • R(E);
    • Threat
      • QAB1(F)
    • Vars
      • K(c);S_FLIGHT,XR(E)::QAR2(F)
      • S(d);SBLOCK,XR(E)::P(C)
      • B(g);SBLOCK::QAR2(F)
      • B(h);N_GUARD::R1(E),XB(h)
      • B(h);SBLOCK::QAB(F),XB(g)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(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).