MESON Chess Problem Database

Problem Display
PID: 228692 (B2b2q1/1R6/4b2N/3RP1p1/2P1kPN1/3pP3/2n5/3Q3K w - - 0 1)

Guida, Marco

StrateGems, 2020

B2b2q1/1R6/4b2N/3RP1p1/2P1kPN1/3pP3/2n5/3Q3K

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rd4#
    • 1...Se1
      • 2.Rd4#
    • 1...Sa3
      • 2.Rd4#
    • 1...Sb4
      • 2.Rd4#
    • 1...Sd4
      • 2.Rxd4#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Sf2#
      • 1...Bxg4
        • 2.Rf7#
      • 1...Sxe3
        • 2.Rd4#
      • 1...gxf4!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Rd4#
      • 1...Bxg4
        • 2.Rxd3#
      • 1...Bxd5
        • 2.Bxd5#
      • 1...Sxe3
        • 2.Sf2#
      • 1...Sd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::R1(G)
    • S(a);N_GUARD::R1(G),XS(a)
  • Tries
    • Try
      • R(G);XP(b)
      • Threat
        • S(F)
      • Vars
        • B(e);N_GUARD,XS(F)::B(K)+R(J)
        • S(a);N_GUARD,XP(C)::R1(G)
      • Refutation
        • P(d);XP(E)
  • Actual
    • R(J);
    • Threat
      • B(K)+R(G),DCHECK
    • Vars
      • B(e);N_GUARD,XS(F)::B(K)+R(G),XP(b)
      • B(e);OGATE,P_SPINB(e),XR(G)::B(K),XB(e)
      • S(a);SBLOCK,XP(C)::S(F)
      • S(a);::B(K)+R(G),DCHECK,XS(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).