Problem Display
PID: 179672 (8/1P4p1/5pK1/3BNp2/2p2kN1/1PP5/5P2/7R w - - 0 1)

Gorbatenko, Yuri Grigorevich

Kopnin, Aleksey Grigorevich

1st Comm., Sahs (Latvia), 1980

8/1P4p1/5pK1/3BNp2/2p2kN1/1PP5/5P2/7R

#2

9 + 5


6490 yacpdb 2018

SOLUTION


  • SOUND
  • Tries
    • 1.Sxf6?
      • 1...Kxe5
        • 2.b8Q#
        • 2.b8B#
      • 1...cxb3
        • 2.Sd3#
      • 1...gxf6!
    • 1.Sf3?
      • 1...Kxg4
        • 2.Rh4#
      • 1...fxg4
        • 2.b8Q#
        • 2.b8B#
      • 1...cxb3!
    • 1.Sxc4?
      • 1...fxg4
        • 2.b8Q#
        • 2.b8B#
      • 1...Kxg4!
    • 1.Rh4?
      • 1...cxb3
        • 2.Sd3#
      • 1...fxe5
        • 2.Sh2#
        • 2.Se3#
        • 2.Sf6#
        • 2.Sh6#
      • 1...fxg4!
    • 1.Rh5?
      • threat
        • 2.Rxf5#
      • 1...fxg4
        • 2.Rf5#
      • 1...fxe5!
    • 1.bxc4?
      • 1...fxg4
        • 2.Sd3#
      • 1...fxe5!
    • 1.b8Q?
      • 1...cxb3
        • 2.Qb4#
      • 1...fxg4
        • 2.Sd3#
        • 2.Sf3#
        • 2.Sxc4#
        • 2.Sc6#
        • 2.Sd7#
        • 2.Sf7#
      • 1...fxe5!
  • Keys
    • 1.Se3!
      • 1...Kxe5
        • 2.b8Q#
        • 2.b8B#
      • 1...cxb3
        • 2.Sd3#
      • 1...fxe5
        • 2.Rh4#

This is a version of 66781

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);XP(d)
      • Vars
        • K(b);S_FLIGHT,XS(G)::P=Q
        • P(a);N_GUARD,XP(C)::S(G)
      • Refutation
        • P(e);XS(E)
    • Try
      • S(G);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XS(E)::R1(A)
        • P(c);SBLOCK,XS(E)::P=Q
      • Refutation
        • P(a);XP(C)
    • Try
      • S(G);XP(a)
      • Vars
        • P(c);SBLOCK,XS(E)::P=Q
      • Refutation
        • K(b);P-FLIGHT,XS(E)
    • Try
      • R(A);
      • Vars
        • P(a);N_GUARD,XP(C)::S(G)
      • Refutation
        • P(c);P_SPINP(c),XS(E)
    • Try
      • R(A);
      • Threat
        • R1(A),XP(c)
      • Vars
        • P(c);XS(E)::R1(A)
      • Refutation
        • P(d);XS(G)
    • Try
      • P(C);XP(a)
      • Vars
        • P(c);SBLOCK,XS(E)::S(G)
      • Refutation
        • P(d);XS(G)
    • Try
      • P(I);
      • Vars
        • P(a);OGATEB,XP(C)::QAR(I)
      • Refutation
        • P(d);P_SPINP(d),XS(G)
  • Actual
    • S(E);
    • Vars
      • K(b);S_FLIGHT,XS(G)::P=Q
      • P(a);N_GUARD,XP(C)::S(G)
      • P(d);SBLOCK,XS(G)::R(A)


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).