MESON Chess Problem Database

Problem Display
PID: 219619 (5qrb/1R2P1N1/4NkPp/4p3/8/r1QpK3/6R1/8 w - - 0 1)

Gavrilov, Constantin Grigorievich

Tidskrift for Schack, 1909

5qrb/1R2P1N1/4NkPp/4p3/8/r1QpK3/6R1/8

#2

8 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.exf8S?
      • threat
        • 2.Sh7#
        • 2.Rf2#
        • 2.Rf7#
      • 1...Rxg7
        • 2.Rf2#
      • 1...Bxg7
        • 2.Rf2#
        • 2.Rf7#
      • 1...Ra2
        • 2.Sh7#
        • 2.Rf7#
      • 1...Ra4
        • 2.Sh7#
        • 2.Rf7#
      • 1...Ra7
        • 2.Sh7#
        • 2.Rf2#
      • 1...Rxf8!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sh5#
      • 1...exd4+
        • 2.Qxd4#
      • 1...Kxg7
        • 2.e8S#
      • 1...Qxg7
        • 2.Qc6#
      • 1...Rxg7
        • 2.Qc6#
      • 1...Bxg7
        • 2.Qc6#
      • 1...e4
        • 2.Sb3#
      • 1...h5
        • 2.Sxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(G);XQ(f)
      • Threat
        • DUALS(3)
      • Vars
        • R(g);XS(H)::R(A)
      • Refutation
        • R(g);XS(G)
  • Actual
    • S(D);N_PINP(c)
    • Threat
      • S(H)
    • Vars
      • P(c);CHECK,OGATE,P_SPINP(c),XS(D)::QAB(B),XP(c)
      • K(d);S_FLIGHT,XS(H)::P=S
      • Q(f);SBLOCK,XS(H)::QAR(B)
      • R(g);SBLOCK,XS(H)::QAR(B)
      • B(h);SBLOCK,XS(H)::QAR(B)
      • P(c);::QAB(B)+S(D)
      • P(e);::S(H),XP(e)
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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).