MESON Chess Problem Database

Problem Display
PID: 268328 (4r3/8/1pp5/p1k1r2R/p5P1/P1q1N3/5BK1/b1QR1B2 w - - 0 1)

Kiss, Janos

3rd Prize, KeyStip 27A. Ty., 1981

4r3/8/1pp5/p1k1r2R/p5P1/P1q1N3/5BK1/b1QR1B2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxc4#
    • 1...Ra8
      • 2.Rxe5#
    • 1...Rb8
      • 2.Rxe5#
    • 1...Rc8
      • 2.Rxe5#
    • 1...Rf8
      • 2.Rxe5#
    • 1...Rg8
      • 2.Rxe5#
    • 1...Rh8
      • 2.Rxe5#
  • Tries
    • 1.Sc2+?
      • 1...Qe3
        • 2.Sxa1#
      • 1...Qd4!
    • 1.Sc4+?
      • 1...Kb5
        • 2.Sd6#
      • 1...Qe3
        • 2.Sb2#
      • 1...Qd4!
    • 1.Sd5+?
      • 1...Re3
        • 2.Se7#
      • 1...Kd6!
  • Keys
    • 1.Sf5+!
      • 1...Re3
        • 2.Se7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(b);OGATE::QAR1(A),XQ(b)
    • R(i);N_GUARD::R(I),XR(f)
    • R(i);N_GUARD,P_PINP(H)::R(I),XR(f)
  • Tries
    • Try
      • S(G);CHECK,N_PINQ(b)
      • Vars
        • Q(b);P_SPINQ(b)::QAR(A)+S(G),XB(a)
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • S(G);CHECK,N_PINQ(b)
      • Vars
        • K(e);P-FLIGHT::B(C)+S(G),DCHECK
        • Q(b);P_SPINQ(b)::QAR(A)+S(G)
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • S(G);CHECK,N_PINR(f)
      • Vars
        • R(f);P_SPINR(f)::R(I)+S(G)
      • Refutation
        • K(e);N_SPINQ(b),S_FLIGHT
  • Actual
    • S(G);CHECK,N_PINR(f)
    • Vars
      • R(f);P_SPINR(f)::R(I)+S(G)
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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).