MESON Chess Problem Database

Problem Display
PID: 39614 (1K5R/7B/QP6/1P6/8/1PrR4/1pkNp3/2rb4 w - - 0 1)

Janevski, Zivko

6th Place, Match: Macedonia - USA, 2001

1K5R/7B/QP6/1P6/8/1PrR4/1pkNp3/2rb4

#2

9 + 6

145 StrateGems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8+
      • 2.Rxc8#
      • 2.Qxc8#
    • 1...b1S
      • 2.Qa2#
  • Tries
    • 1.Qc8?
      • threat
        • 2.Rd4#
        • 2.Rd5#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rdd8#
        • 2.Qxc3#
      • 1...Rxc8+
        • 2.Rxc8#
      • 1...Ra1
        • 2.Qxc3#
      • 1...Rb1
        • 2.Qxc3#
      • 1...b1Q
        • 2.Qxc3#
      • 1...b1B
        • 2.Qxc3#
      • 1...b1R
        • 2.Qxc3#
      • 1...e1Q
        • 2.Qxc3#
      • 1...e1S
        • 2.Qxc3#
      • 1...e1R
        • 2.Qxc3#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rc7
        • 2.Qxc7#
      • 1...b1S!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qxc3#
      • 1...Rc8+
        • 2.Rxc8#
      • 1...Rxb3
        • 2.Rxb3#
      • 1...Rxd3
        • 2.Rc8#
      • 1...b1S
        • 2.Qa2#
      • 1...Rc4
        • 2.Rd4#
      • 1...Rc5
        • 2.Rd5#
      • 1...Rc6
        • 2.Rd6#
      • 1...Rc7
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAR2(E)
  • Tries
    • Try
      • Q(E);P_PINR(f)
      • Threat
        • DUALS(6)
      • Vars
        • R(f);CHECK,N_SPINR(f),OGATE,XQ(E)::R(I),XR(f)
        • R(a);::QAR1(E),XR(f)
        • P(c);::QAR1(E),XR(f)
        • P(e);::QAR1(E),XR(f)
        • R(f);OGATEB::QAR2(E),XR(f)
        • R(f);OGATEB::QAR(E),XR(f)
      • Refutation
        • P(c);
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XR(f)
    • Vars
      • R(f);CHECK,OGATEB::R(I),XR(f)
      • R(f);OGATE,XP(B)::B(G)+R(C),XR(f)
      • R(f);OGATEB,P_SPINR(f),XR(C)::R(I)
      • P(c);OGATEB::QAR2(E)
      • R(f);N_GUARD::B(G)+R(C)
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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).