MESON Chess Problem Database

Problem Display
PID: 214704 (n7/B3K3/1q6/P1kBQ3/2P3p1/P5P1/6Nn/6b1 w - - 0 1)

Klark, Dmitry Vasilevich

Vsemirnaya Illustrantiya, 1880

n7/B3K3/1q6/P1kBQ3/2P3p1/P5P1/6Nn/6b1

#2

9 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qxe3#
    • 1...Bd4
      • 2.Qd6#
    • 1...Sc7
      • 2.Bxb6#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Sd3#
        • 2.Se6#
      • 1...Sc7
        • 2.Sd3#
        • 2.Bxb6#
      • 1...Qxa7+!
    • 1.Qc7+?
      • 1...Sxc7
        • 2.Bxb6#
      • 1...Kd4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Bh1#
        • 2.Bg2#
        • 2.Bf3#
        • 2.Be4#
        • 2.Bb7#
        • 2.Bxa8#
      • 1...Qxa7+
        • 2.Bb7#
      • 1...Bxe3
        • 2.Qxe3#
      • 1...Sf3
        • 2.Bxf3#
      • 1...Sc7
        • 2.Bxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB(G),XB(a)
    • B(a);SBLOCK::QAB1(G)
    • S(f);N_GUARD::B(H),XQ(e)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Refutation
        • Q(e);CHECK,N_SPINQ(e),XB(H)
    • Try
      • Q(G);CHECK
      • Vars
        • S(f);XQ(G)::B(H),XQ(e)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(A);
    • Threat
      • DUALS(6)
    • Vars
      • Q(e);CHECK,N_SPINQ(e),XB(H)::QAR(G)+B(F)
      • B(a);OGATE,XS(A)::QAB(G),XB(a)
      • S(b);::QAR(G)+B(F),XS(b)
      • S(f);N_GUARD::B(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).