MESON Chess Problem Database

Problem Display
PID: 141656 (1n6/1P5Q/1K2P3/1p1kPN2/8/1P1n3B/prp1R1P1/Bb6 w - - 0 1)

Narayanan, Chithathuz Gopatan Sathya

1st Prize, StrateGems, 2011

1n6/1P5Q/1K2P3/1p1kPN2/8/1P1n3B/prp1R1P1/Bb6

#2

11 + 8

56 The Problemist 2013
23 Die Schwalbe 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Se7#
    • 1...Rxb3
      • 2.Se3#
    • 1...Sa6
      • 2.Qd7#
    • 1...Sc6
      • 2.Qd7#
    • 1...Sd7+
      • 2.Qxd7#
  • Tries
    • 1.Bxb2?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Kxe6
        • 2.Se3#
        • 2.Se7#
      • 1...Sxe5
        • 2.Rxe5#
      • 1...c1Q
        • 2.Se7#
      • 1...c1B
        • 2.Se7#
      • 1...Sc6
        • 2.Se3#
        • 2.Qd7#
      • 1...Sxb2!
    • 1.Qe7?
      • threat
        • 2.Qd6#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Rxb3!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qd6#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Kxe6
        • 2.Se3#
      • 1...Rxb3
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • K(g);S_FLIGHT,XP(I)::B(E)+S(G)
    • R(c);XP(D)::S(G)
    • S(h);N_GUARD::QAR2(K)
    • S(h);CHECK,N_GUARD::QAR2(K),XS(h)
  • Tries
    • Try
      • B(A);XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);CHECK,N_GUARD::QAR2(K),XS(h)
        • S(e);OGATE,XP(F)::R1(B),XS(e)
        • P(d);::S(G)
      • Refutation
        • S(e);XB(A)
    • Try
      • Q(K);
      • Threat
        • QAR1(K)
      • Vars
        • S(h);CHECK,N_GUARD::QAR2(K),XS(h)
      • Refutation
        • R(c);XP(D)
  • Actual
    • Q(K);
    • Threat
      • QAR1(K)
    • Vars
      • S(h);CHECK,N_GUARD::QAR2(K),XS(h)
      • K(g);S_FLIGHT,XP(I)::B(E)+S(G)
      • R(c);XP(D)::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).