MESON Chess Problem Database

Problem Display
PID: 43271 (n7/4QNp1/R2p2p1/1r1r1kB1/B7/1p4nK/8/2R5 w - - 0 1)

Kosovac, Adi

StrateGems, 2002

n7/4QNp1/R2p2p1/1r1r1kB1/B7/1p4nK/8/2R5

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Bd7#
    • 1...Ra5
      • 2.Bd7#
    • 1...Rbc5
      • 2.Bd7#
    • 1...Rb6
      • 2.Bd7#
    • 1...Rb8
      • 2.Bd7#
    • 1...Rdc5
      • 2.Sxd6#
    • 1...Re5
      • 2.Sxd6#
    • 1...Sf1
      • 2.Rxf1#
    • 1...Se4
      • 2.Qd7#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Rf4#
        • 2.Qd7#
      • 1...Rb7
        • 2.Rf4#
      • 1...Rb4
        • 2.Bd7#
        • 2.Qd7#
      • 1...Re5
        • 2.Sxd6#
        • 2.Rf4#
      • 1...Se2
        • 2.Qe4#
        • 2.Qd7#
      • 1...Se4
        • 2.Qxe4#
        • 2.Qd7#
      • 1...Sh5
        • 2.Qe4#
        • 2.Qd7#
      • 1...Sb6
        • 2.Rf4#
      • 1...Sc7
        • 2.Rf4#
      • 1...Rd4!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Sxd6#
      • 1...Rbxc5
        • 2.Bd7#
      • 1...dxc5
        • 2.Qe6#
      • 1...Rb6
        • 2.Bd7#
        • 2.Rxd5#
      • 1...Se4
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(c);OGATE::B(C)
    • R(d);N_GUARD::S(G),XP(f)
    • S(b);N_GUARD::R(A),XS(b)
    • S(b);SBLOCK::QAB(F)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::R1(A)
        • S(i);::R1(A)
      • Refutation
        • R(d);
  • Actual
    • R(A);P_PINR(d)
    • Threat
      • S(G),XP(f)
    • Vars
      • R(c);N_SPINR(d),OGATE,XR(A)::B(C)
      • P(f);N_SPINR(d),XR(A)::QAB1(F)
      • S(b);SBLOCK::QAB(F)
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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).