MESON Chess Problem Database

Problem Display
PID: 227569 (4B3/4p3/2n5/1R2Bkp1/R5p1/4p1p1/4N1K1/8 w - - 0 1)

Neunivako, Pavel Efimovich

Shakhmatny Listok, 1926

4B3/4p3/2n5/1R2Bkp1/R5p1/4p1p1/4N1K1/8

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...e6
      • 2.Sxg3#
  • Tries
    • 1.Sd4+?
      • 1...Ke4
        • 2.Bg6#
      • 1...Sxd4!
  • Keys
    • 1.Ra6!
      • 1...Ke4
        • 2.Bg6#
      • 1...Ke6
        • 2.Sd4#
      • 1...Sxe5
        • 2.Bg6#
      • 1...Sb4
        • 2.Sxg3#
        • 2.Bg6#
      • 1...Sd4
        • 2.Sxg3#
        • 2.Bg6#
      • 1...Sa5
        • 2.Sxg3#
        • 2.Bg6#
      • 1...Sa7
        • 2.Sxg3#
        • 2.Bg6#
      • 1...Sb8
        • 2.Sxg3#
        • 2.Bg6#
      • 1...Sd8
        • 2.Sxg3#
        • 2.Bg6#
      • 1...e6
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(g);SBLOCK::S(A),XP(b)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(d);S_FLIGHT::B(F)
      • Refutation
        • S(f);XS(A)
  • Actual
    • R(C);
    • Vars
      • K(d);S_FLIGHT::B(F)
      • K(d);P_SPINS(f),S_FLIGHT::S(A)
      • S(f);P_SPINS(f),XB(E)::B(F)
      • P(g);SBLOCK::S(A),XP(b)
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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).