MESON Chess Problem Database

Problem Display
PID: 129819 (3K4/3p4/4N3/7p/7k/3p1p1P/Qn1p1P1R/4bb2 w - - 0 1)

Rosol, Karel

Svobodne Slovo, 1951

3K4/3p4/4N3/7p/7k/3p1p1P/Qn1p1P1R/4bb2

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qc4#
      • 2.Qa4#
    • 1...Sa4
      • 2.Qc4#
      • 2.Qxa4#
    • 1...Sc4
      • 2.Qxc4#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qe4#
        • 2.Qd4#
        • 2.Qg5#
      • 1...Bxf2
        • 2.Qg5#
      • 1...dxe6!
    • 1.Qxb2?
      • threat
        • 2.Qd4#
        • 2.Qf6#
        • 2.Qb4#
      • 1...Bxh3
        • 2.Qd4#
        • 2.Qb4#
      • 1...dxe6
        • 2.Qf6#
      • 1...d1Q
        • 2.Qd4#
        • 2.Qf6#
      • 1...d1S
        • 2.Qd4#
        • 2.Qf6#
      • 1...d1B
        • 2.Qd4#
        • 2.Qf6#
      • 1...d1R
        • 2.Qd4#
        • 2.Qf6#
      • 1...d5
        • 2.Qd4#
        • 2.Qf6#
      • 1...Bxf2!
    • 1.Qa4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxa4!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qd4#
      • 1...Bxf2
        • 2.Qxf2#
      • 1...dxe6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD::QAR(A),XS(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);XP(B)::QAB1(A)
      • Refutation
        • P(i);XS(E)
    • Try
      • Q(A);XS(c)
      • Threat
        • DUALS(3)
      • Vars
        • P(i);XS(E)::QAB(A)
      • Refutation
        • B(a);XP(B)
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR(A),XS(c)
      • Refutation
        • S(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • B(a);OGATE,XP(B)::QAB(A),XB(a)
      • P(i);OGATE,XS(E)::QAB(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).