MESON Chess Problem Database

Problem Display
PID: 195165 (5b1q/8/7p/2Rnp2Q/1p1Nk2n/r7/p1PPN3/K7 w - - 0 1)

Janet, Frank

Pittsburgh Gazette-Times, 1918

5b1q/8/7p/2Rnp2Q/1p1Nk2n/r7/p1PPN3/K7

#2

7 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Qg6#
      • 2.Qf5#
    • 1...Sf3
      • 2.Qg6#
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qxg6#
      • 2.Qf5#
    • 1...Sc3
      • 2.Qg4#
      • 2.Qxh4#
    • 1...Sb6
      • 2.Qg4#
      • 2.Qxh4#
    • 1...Sf6
      • 2.Rxe5#
      • 2.Qxe5#
    • 1...Sc7
      • 2.Qg4#
      • 2.Qxh4#
    • 1...Se7
      • 2.Qg4#
      • 2.Qxh4#
    • 1...exd4
      • 2.Qxd5#
  • Tries
    • 1.Qg6+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sxg6!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Rc4#
      • 1...Bxc5
        • 2.Sxc5#
      • 1...Sf3
        • 2.Qg6#
      • 1...Sf5
        • 2.Qh1#
      • 1...Sc3
        • 2.Qg4#
      • 1...Se3
        • 2.d3#
      • 1...Sf4
        • 2.Sg3#
      • 1...Sb6
        • 2.Qg4#
      • 1...Sf6
        • 2.Rxe5#
      • 1...Sc7
        • 2.Qg4#
      • 1...Se7
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD::QAB1(G),XS(e)
    • P(g);OGATE,XS(E)::QAB1(G),XS(f)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(G),XS(e)
      • Refutation
        • S(e);XQ(G)
  • Actual
    • S(E);
    • Threat
      • R(F)
    • Vars
      • B(i);XR(F)::S(E),XB(i)
      • S(e);N_GUARD,SBLOCK::QAB(G)
      • S(e);OGATE,SBLOCK::QAB(G)
      • S(f);N_GUARD::QAR2(G)
      • S(f);SBLOCK::P(C)
      • S(f);SBLOCK::S(D)
      • S(f);OGATE::R1(F),XP(g)
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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).