MESON Chess Problem Database

Problem Display
PID: 245952 (8/n2K2BN/1p1N2Pp/3k4/pP1PpP2/3r4/7Q/b5r1 w - - 0 1)

Kopyl, Valery Volodimirovich

Problemist Ukraini, 2019

8/n2K2BN/1p1N2Pp/3k4/pP1PpP2/3r4/7Q/b5r1

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qh5#
    • 1...Rc1
      • 2.Qh5#
    • 1...Rgd1
      • 2.Qh5#
    • 1...Re1
      • 2.Qh5#
    • 1...Rf1
      • 2.Qh5#
    • 1...Rdd1
      • 2.Qa2#
    • 1...Rxd4
      • 2.Sf6#
    • 1...Bc3
      • 2.Qa2#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qc4#
      • 1...Rxd4
        • 2.Sf6#
      • 1...Rc3
        • 2.Qxe4#
      • 1...Bc3
        • 2.Qa2#
      • 1...b5
        • 2.Qc5#
      • 1...Rc1!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe4#
      • 1...Rxd4
        • 2.Sf6#
      • 1...Re1
        • 2.Qh5#
      • 1...Re3
        • 2.Qc4#
      • 1...e3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAR(A)
    • R(c);N_GUARD::QAB(A)
    • R(c);SBLOCK,XP(C)::S(I)
    • B(a);S_CUTR(c)::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);SBLOCK,XP(C)::S(I)
        • R(c);OGATE::QAB1(A),XP(e)
        • B(a);S_CUTR(c)::QAB(A)
        • P(g);N_GUARD::QAR1(A)
      • Refutation
        • R(b);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(e)
    • Vars
      • R(c);SBLOCK,XP(C)::S(I)
      • R(b);N_GUARD::QAR(A)
      • R(c);OGATE::QAB1(A)
      • P(e);OGATEB::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).