MESON Chess Problem Database

Problem Display
PID: 57229 (1K2R3/3p4/1N1k4/NPp5/1r1r1qp1/2Q5/4p2R/4B2b w - - 0 1)

Kuligin, Nikolai Volodimirovich

Troll, 1995

1K2R3/3p4/1N1k4/NPp5/1r1r1qp1/2Q5/4p2R/4B2b

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Rh6#
    • 1...Qh6
      • 2.Rxh6#
    • 1...Re4
      • 2.Sb7#
    • 1...Rd5
      • 2.Sb7#
      • 2.Sc8#
    • 1...Bd5
      • 2.Sc8#
    • 1...Bb7
      • 2.Sxb7#
    • 1...c4
      • 2.Qxb4#
  • Tries
    • 1.Rh6+?
      • 1...Qf6
        • 2.Rxf6#
      • 1...Qxh6!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Rh6#
      • 1...c4
        • 2.Bxb4#
      • 1...Re4
        • 2.Sb7#
      • 1...Be4
        • 2.Qxf4#
      • 1...Bd5
        • 2.Sc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD::R(B)
    • Q(e);N_GUARD::R(B),XQ(e)
    • R(d);S_CUTB(a)::S(D)
    • B(a);SBLOCK::S(F)
    • B(a);N_GUARD::S(D),XB(a)
    • P(g);OGATEB::QAB(C),XR(c)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e)::R(B),XQ(e)
      • Refutation
        • Q(e);XR(B)
  • Actual
    • Q(C);P_PINQ(e)
    • Threat
      • R(B)
    • Vars
      • P(g);OGATEB::B(A),XR(c)
      • R(d);S_CUTB(a)::S(D)
      • B(a);S_CUTR(d)::QAB(C),XQ(e)
      • B(a);SBLOCK::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).