MESON Chess Problem Database

Problem Display
PID: 179984 (Q3n3/3p1p1B/2P3P1/2PpNpp1/2P1k3/2PNb3/4K3/8 w - - 0 1)

Gross, Erwin

Deutsche Schachzeitung, 1970

Q3n3/3p1p1B/2P3P1/2PpNpp1/2P1k3/2PNb3/4K3/8

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...dxc4
      • 2.cxd7#
    • 1...d4
      • 2.cxd7#
    • 1...f4
      • 2.gxf7#
  • Tries
    • 1.Sxd7?
      • threat
        • 2.Qxe8#
      • 1...Bxc5
        • 2.S7xc5#
      • 1...dxc4
        • 2.c7#
      • 1...f4
        • 2.gxf7#
      • 1...Bf4
        • 2.Sf2#
      • 1...Sd6
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sc7
        • 2.Sf6#
      • 1...Sg7
        • 2.Sf6#
      • 1...Bd4!
  • Keys
    • 1.Sxf7!
      • threat
        • 2.Qxe8#
      • 1...Bxc5
        • 2.Sxg5#
      • 1...dxc4
        • 2.cxd7#
      • 1...f4
        • 2.g7#
      • 1...Bd4
        • 2.Sxg5#
      • 1...Bf4
        • 2.Sf2#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sf6
        • 2.Sd6#
      • 1...Sc7
        • 2.Sd6#
      • 1...Sg7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(c);XP(D)::QAB(J)+P(G),XP(f)
    • P(c);::QAB(J)+P(G),XP(f)
    • P(d);::B(I)+P(H),XP(g)
  • Tries
    • Try
      • S(F);XP(f)
      • Threat
        • QAR(J),XS(h)
      • Vars
        • B(a);XP(E)::S(F),XB(a)
        • P(c);XP(D)::QAB(J)+P(G)
        • P(d);::B(I)+P(H),XP(g)
        • B(a);N_GUARD,SBLOCK::S(C)
        • S(h);N_GUARD::S(F)
        • S(h);N_GUARD::S(F),XS(h)
      • Refutation
        • B(a);
  • Actual
    • S(F);XP(g)
    • Threat
      • QAR(J),XS(h)
    • Vars
      • B(a);N_GUARD,XP(E)::S(F),XP(e)
      • P(c);XP(D)::QAB(J)+P(G),XP(f)
      • P(d);::B(I)+P(H)
      • B(a);N_GUARD::S(F),XP(e)
      • B(a);N_GUARD,SBLOCK::S(C)
      • S(h);N_GUARD::S(F),XS(h)
      • S(h);N_GUARD::S(F)
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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).