MESON Chess Problem Database

Problem Display
PID: 117106 (8/6B1/2r2N2/8/2pkBP2/Q1n5/3p1p2/5NnK w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Novoye Vremya, 1908-1909

8/6B1/2r2N2/8/2pkBP2/Q1n5/3p1p2/5NnK

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qe3#
    • 1...Sa2
      • 2.Qe3#
    • 1...Se2
      • 2.Qe3#
    • 1...Sa4
      • 2.Qe3#
    • 1...Sxe4
      • 2.Qe3#
    • 1...Sb5
      • 2.Qe3#
  • Tries
    • 1.Qa7+?
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rc5!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Sf5#
      • 1...Ke3
        • 2.Sd5#
      • 1...Rxf6
        • 2.Qa7#
      • 1...Rc5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(d);OGATE::QAB1(C)
    • S(d);OGATE,XB(D)::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAB(C),XR(g)
      • Refutation
        • R(g);P_SPINR(g)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(f);P_SPINS(d),S_FLIGHT::S(F)
      • R(g);N_GUARD,P_SPINR(g),XS(F)::QAB(C)
      • R(g);N_GUARD::B(G)+S(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).