MESON Chess Problem Database

Problem Display
PID: 163633 (1qNk1K2/8/1PR5/5B2/8/8/8/8 w - - 0 1)

Kukin, Gennady

Uralski Problemist, 1994

1qNk1K2/8/1PR5/5B2/8/8/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6+
      • 2.Rxd6#
    • 1...Qc7
      • 2.bxc7#
    • 1...Qa8
      • 2.Rd6#
    • 1...Qxc8
      • 2.Rxc8#
  • Tries
    • 1.Sa7?
      • 1...Qd6+
        • 2.Rxd6#
      • 1...Qxa7
        • 2.Rc8#
      • 1...Qxb6
        • 2.Rc8#
      • 1...Qh2
        • 2.Rc8#
      • 1...Qg3
        • 2.Rc8#
      • 1...Qf4
        • 2.Rc8#
      • 1...Qe5
        • 2.Rc8#
      • 1...Qc7
        • 2.bxc7#
      • 1...Qa8
        • 2.Rd6#
      • 1...Qc8
        • 2.Rxc8#
      • 1...Qb7!
    • 1.Se7?
      • 1...Qxb6
        • 2.Rc8#
      • 1...Qh2
        • 2.Rc8#
      • 1...Qg3
        • 2.Rc8#
      • 1...Qf4
        • 2.Rc8#
      • 1...Qe5
        • 2.Rc8#
      • 1...Qd6
        • 2.Rxd6#
        • 2.Rc8#
      • 1...Qa7
        • 2.Rc8#
      • 1...Qc7
        • 2.bxc7#
      • 1...Qa8
        • 2.Rd6#
      • 1...Qc8
        • 2.Rxc8#
      • 1...Qb7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Qxd6+
        • 2.Rxd6#
      • 1...Qa7
        • 2.Rc8#
      • 1...Qc7
        • 2.bxc7#
      • 1...Qb7
        • 2.Sxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(a);CHECK,N_GUARD::R(C),XQ(a)
    • Q(a);OGATE::P(B),XQ(a)
    • Q(a);N_GUARD::R(C)
    • Q(a);OGATE,XS(D)::R1(C),XQ(a)
  • Tries
    • Try
      • S(D);
      • Vars
        • Q(a);CHECK,N_GUARD::R(C),XQ(a)
        • Q(a);N_GUARD,XS(D)::R1(C)
        • Q(a);N_GUARD,XP(B)::R1(C)
        • Q(a);N_GUARD::R1(C)
        • Q(a);N_GUARD,P_PINB(A)::R1(C)
        • Q(a);OGATE::P(B),XQ(a)
        • Q(a);N_GUARD::R(C)
        • Q(a);N_GUARD::R1(C),XQ(a)
      • Refutation
        • Q(a);
    • Try
      • S(D);
      • Vars
        • Q(a);N_GUARD,XP(B)::R1(C)
        • Q(a);N_GUARD::R1(C)
        • Q(a);N_GUARD,P_PINB(A)::R1(C)
        • Q(a);OGATE::P(B),XQ(a)
        • Q(a);N_GUARD::R(C)
        • Q(a);N_GUARD::R1(C),XQ(a)
      • Refutation
        • Q(a);
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • Q(a);CHECK,OGATE,XS(D)::R(C),XQ(a)
      • Q(a);N_GUARD::R1(C)
      • Q(a);OGATE::P(B),XQ(a)
      • Q(a);N_GUARD::S(D),XQ(a)
HTML5 logo

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).