MESON Chess Problem Database

Problem Display
PID: 180274 (2b5/1p1BP1n1/1N2P3/2BpkPQn/8/3P2p1/4P1p1/6K1 w - - 0 1)

Lider, Valentin Viktorovich

Problem (Zagreb), 1976

2b5/1p1BP1n1/1N2P3/2BpkPQn/8/3P2p1/4P1p1/6K1

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd7
      • 2.Sxd7#
    • 1...Sxe6
      • 2.fxe6#
    • 1...Se8
      • 2.f6#
  • Tries
    • 1.e3?
      • 1...Bxd7
        • 2.Sxd7#
      • 1...Sxe6
        • 2.fxe6#
      • 1...Sf4
        • 2.exf4#
      • 1...Sf6
        • 2.Qf4#
      • 1...Se8
        • 2.f6#
      • 1...d4
        • 2.exd4#
      • 1...Sxf5!
  • Keys
    • 1.e4!
      • 1...Bxd7
        • 2.Sxd7#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Sxe6
        • 2.fxe6#
      • 1...dxe4
        • 2.d4#
      • 1...Sf4
        • 2.Qxg7#
      • 1...Sf6
        • 2.Qxg3#
      • 1...Se8
        • 2.f6#
      • 1...d4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(h);XB(I)::S(G),XB(h)
    • S(g);OGATE,XP(H)::QAR(F)+P(E),XS(g)
    • S(g);N_GUARD::QAR(F)+P(E)
  • Tries
    • Try
      • P(B);
      • Vars
        • B(h);XB(I)::S(G),XB(h)
        • S(g);OGATE,XP(H)::QAR(F)+P(E),XS(g)
        • S(e);OGATE::P(B),XS(e)
        • S(e);N_GUARD,SBLOCK::QAB1(F)
        • S(g);N_GUARD::QAR(F)+P(E)
        • P(c);OGATE::P(B),XP(c)
      • Refutation
        • S(g);P_SPINS(g),XP(E)
  • Actual
    • P(B);
    • Vars
      • B(h);XB(I)::S(G),XB(h)
      • S(g);OGATE,P_SPINS(g),XP(E)::QAR1(F),XS(g)
      • S(g);OGATE,XP(H)::QAR(F)+P(E),XS(g)
      • P(c);SBLOCK,XP(B)::P(C)
      • S(e);N_GUARD,SBLOCK::QAB(F),XS(g)
      • S(e);N_GUARD,SBLOCK::QAB(F),XP(b)
      • S(g);N_GUARD::QAR(F)+P(E)
      • P(c);N_GUARD::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).