MESON Chess Problem Database

Problem Display
PID: 178251 (1KR3b1/p1ppPn2/1pk2pP1/qnN1b2r/3pNp1P/rQp2B2/8/8 w - - 0 1)

Popovski, Aleksandr

Vratnica-64, 2003

1KR3b1/p1ppPn2/1pk2pP1/qnN1b2r/3pNp1P/rQp2B2/8/8

#2

9 + 16

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sbd6
      • 2.Rxc7#
    • 1...Sd8
      • 2.exd8S#
    • 1...d5
      • 2.e8Q#
      • 2.e8B#
    • 1...d6
      • 2.e8Q#
      • 2.e8B#
  • Tries
    • 1.Sd6+?
      • 1...Kxc5
        • 2.Sb7#
      • 1...Kxd6!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Sed6#
        • 2.Qc4#
      • 1...Rxb3
        • 2.Sed6#
      • 1...d5
        • 2.e8Q#
        • 2.e8B#
      • 1...d6
        • 2.e8Q#
        • 2.e8B#
      • 1...Qa4
        • 2.Sed6#
      • 1...Qb4
        • 2.Sed6#
      • 1...Ra4
        • 2.Sed6#
      • 1...Bd6
        • 2.Sg5#
      • 1...Sbd6
        • 2.Rxc7#
      • 1...Sg5
        • 2.Sd8#
      • 1...Sfd6
        • 2.Sd8#
      • 1...Sh6
        • 2.Sd8#
      • 1...Sd8
        • 2.Sxd8#
        • 2.exd8S#
      • 1...Sh8
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD,S_CUTB(g)::R1(I),XP(m)
    • S(o);OGATE::PXS(o)=S
    • P(n);::P=Q
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(j);P-FLIGHT,XS(E)::S(C)
      • Refutation
        • K(j);N_SPINP(m),P-FLIGHT,XS(C)
  • Actual
    • S(E);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);XQ(A)::B(B)+S(C)
      • P(n);::P=Q
      • Q(e);::B(B)+S(C)
      • R(a);::B(B)+S(C)
      • B(g);S_CUTP(n)::B(B)+S(C)
      • S(f);N_GUARD,S_CUTB(g)::R1(I),XP(m)
      • S(o);N_GUARD::S(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).