MESON Chess Problem Database

Problem Display
PID: 175808 (3N1n1r/1Q4p1/4R2p/4nk2/2P1N3/r1P1p1K1/8/8 w - - 0 1)

Braun, Georges

Philadelphia Times, 1898

3N1n1r/1Q4p1/4R2p/4nk2/2P1N3/r1P1p1K1/8/8

#2

7 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qf7#
    • 1...Sf3
      • 2.Qf7#
    • 1...Sxc4
      • 2.Qf7#
    • 1...Sc6
      • 2.Qf7#
    • 1...Seg6
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
    • 1...g5
      • 2.Sd6#
      • 2.Rf6#
    • 1...g6
      • 2.Rf6#
  • Tries
    • 1.Rxe5+?
      • 1...Kxe5
        • 2.Qd5#
      • 1...Kg6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sd4#
      • 1...Kxe4
        • 2.Qb1#
      • 1...Kxe6
        • 2.Sd4#
      • 1...Sxc6
        • 2.Qf7#
      • 1...Sxe6
        • 2.Se7#
      • 1...Sf3
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(c);N_GUARD::QAR2(F)
    • S(c);N_GUARD,XP(C)::QAR2(F)
    • S(c);N_GUARD::QAR2(F),XS(c)
    • P(f);N_GUARD::R1(E)
  • Tries
    • Try
      • R(E);CHECK,XS(c)
      • Vars
        • K(d);P-FLIGHT,XR(E)::QAR1(F)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);OGATEB,P_SPINS(c),S_FLIGHT,XS(D)::QAB(F)
      • K(d);S_FLIGHT,XR(E)::S(G)
      • S(c);N_GUARD,XS(G)::QAR2(F)
      • S(g);SBLOCK,XR(E)::S(G)
      • S(c);N_GUARD::QAR2(F)
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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).