MESON Chess Problem Database

Problem Display
PID: 232811 (7R/8/8/8/6N1/1P1K2pp/Q5RN/6bk w - - 0 1)

Kichigin, Viktor Vladimirovich

Freie Presse, 1983

7R/8/8/8/6N1/1P1K2pp/Q5RN/6bk

#2

7 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1?
      • threat
        • 2.Rxg1#
        • 2.Qxg1#
      • 1...gxh2
        • 2.Rxh2#
      • 1...hxg2
        • 2.Sf3#
      • 1...Kxg2!
    • 1.Qa8?
      • threat
        • 2.Rxg3#
      • 1...gxh2
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rxh2#
        • 2.Rg3#
      • 1...hxg2!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Rxg1#
        • 2.Qxg1#
      • 1...Kxg2
        • 2.Qa8#
      • 1...gxh2
        • 2.Rxh2#
      • 1...hxg2
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);P_PINB(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATE,XS(C)::R1(B),XP(c)
        • P(d);SBLOCK,XR(B)::R(G)+S(C)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT,XR(B)
    • Try
      • Q(A);
      • Threat
        • QAB(A)+R(B),XP(c)
      • Refutation
        • P(d);P_SPINP(d),XR(B)
  • Actual
    • Q(A);P_PINB(a)
    • Threat
      • DUALS(2)
    • Vars
      • K(b);N_SPINB(a),OGATEB,S_FLIGHT,XR(B)::QAB(A)
      • P(c);OGATE,XS(C)::R1(B),XP(c)
      • P(d);SBLOCK,XR(B)::R(G)+S(C)
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).