MESON Chess Problem Database

Problem Display
PID: 129724 (3B2K1/1p6/1pPkp3/2R3n1/P7/4P3/r2NQ3/8 w - - 0 1)

Schwede, Constantin

Deutsche Schachzeitung, 1912

3B2K1/1p6/1pPkp3/2R3n1/P7/4P3/r2NQ3/8

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Se4#
    • 1...Sh3
      • 2.Se4#
    • 1...Se4
      • 2.Sxe4#
    • 1...Sf7
      • 2.Se4#
    • 1...Sh7
      • 2.Se4#
  • Tries
    • 1.Qh2+?
      • 1...e5
        • 2.Qxe5#
      • 1...Kxc5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qf8#
      • 1...Kxc5
        • 2.Be7#
      • 1...Sxf3
        • 2.Se4#
      • 1...bxc5
        • 2.Sc4#
      • 1...bxc6
        • 2.Qxc6#
      • 1...e5
        • 2.Qd5#
      • 1...Sf7
        • 2.Se4#
      • 1...Sh7
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::S(A)
    • S(b);N_GUARD::S(A),XS(b)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAB1(B),XP(e)
      • Refutation
        • K(d);S_FLIGHT,XR(E)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • K(d);S_FLIGHT,XR(E)::B(G)
      • S(b);N_GUARD,XQ(B)::S(A)
      • P(c);SBLOCK,XR(E)::S(A)
      • P(f);OGATE,XP(F)::QAR1(B),XP(f)
      • P(e);N_GUARD::QAR1(B)
      • S(b);N_GUARD::S(A)
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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).