MESON Chess Problem Database

Problem Display
PID: 119898 (4Q2R/6bq/5p2/6P1/6k1/7N/4P1NP/1n5K w - - 0 1)

Marik, Josef V

Bohemia, 1903

4Q2R/6bq/5p2/6P1/6k1/7N/4P1NP/1n5K

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Se3#
    • 1...Qc2
      • 2.Se3#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qf5
      • 2.Se3#
      • 2.Rh4#
      • 2.Qh5#
    • 1...Qg6
      • 2.Se3#
    • 1...Qg8
      • 2.Se3#
      • 2.Qe4#
  • Tries
    • 1.Rxh7?
      • threat
        • 2.Se3#
        • 2.Qe4#
      • 1...Kf5
        • 2.Se3#
      • 1...Sd2
        • 2.Se3#
      • 1...Sc3
        • 2.Se3#
      • 1...f5
        • 2.Se3#
        • 2.Rh4#
        • 2.Qh5#
      • 1...Bh6!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Sf2#
      • 1...Kxh3
        • 2.Qf5#
      • 1...Qxg6
        • 2.Se3#
      • 1...Qxh3
        • 2.gxf6#
      • 1...Qh4
        • 2.Rxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(b);S_FLIGHT::S(C)
    • Q(e);::S(C)
    • Q(e);N_GUARD,P_PINS(C)::QAR2(G),XQ(e)
  • Tries
    • Try
      • R(H);XQ(e)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::S(C)
        • S(a);::S(C)
      • Refutation
        • B(d);
  • Actual
    • Q(G);
    • Threat
      • S(E)
    • Vars
      • K(b);P_SPINQ(e),S_FLIGHT,XS(E)::QAB(G)
      • Q(e);XQ(G)::S(C)
      • Q(e);N_GUARD,P_PINP(D),XS(E)::QAR(G)+P(F),XP(c)
      • Q(e);OGATE::R1(H),XQ(e)
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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).