MESON Chess Problem Database

Problem Display
PID: 207239 (4N3/1p1B4/1Bnp4/Pk1r4/p7/K2p2Q1/3P4/8 w - - 0 1)

Paclt, Josef

Svetozor, 1869

4N3/1p1B4/1Bnp4/Pk1r4/p7/K2p2Q1/3P4/8

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Sc7#
    • 1...Re5
      • 2.Qxd3#
    • 1...Rf5
      • 2.Qxd3#
    • 1...Rg5
      • 2.Qxd3#
    • 1...Rh5
      • 2.Qxd3#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Sc7#
      • 1...Ka6
        • 2.Sc7#
      • 1...Rd4!
    • 1.Qh4?
      • threat
        • 2.Sc7#
      • 1...Ka6
        • 2.Sc7#
      • 1...Rd4!
    • 1.Qg4?
      • threat
        • 2.Sc7#
      • 1...Ka6
        • 2.Sc7#
      • 1...Rd4!
  • Keys
    • 1.Qg8!
      • 1...Kc4
        • 2.Sxd6#
      • 1...Ka6
        • 2.Sc7#
      • 1...Rd4
        • 2.Sc7#
      • 1...Rc5
        • 2.Sc7#
      • 1...Re5
        • 2.Sc7#
      • 1...Rf5
        • 2.Sc7#
      • 1...Rg5
        • 2.Sc7#
      • 1...Rh5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINS(e),S_FLIGHT::S(G)
    • R(d);N_GUARD::QAB(C),XP(a)
  • Tries
    • Try
      • Q(C);
      • Threat
        • S(G)
      • Vars
        • K(c);N_SPINS(e),S_FLIGHT::S(G)
      • Refutation
        • R(d);
    • Try
      • Q(C);
      • Threat
        • S(G)
      • Vars
        • K(c);N_SPINS(e),S_FLIGHT::S(G)
      • Refutation
        • R(d);
    • Try
      • Q(C);
      • Threat
        • S(G)
      • Vars
        • K(c);N_SPINS(e),S_FLIGHT::S(G)
      • Refutation
        • R(d);
  • Actual
    • Q(C);
    • Vars
      • K(c);N_SPINS(e),P_SPINR(d),S_FLIGHT::S(G),XP(f)
      • K(c);N_SPINS(e),S_FLIGHT::S(G)
      • R(d);::S(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).