MESON Chess Problem Database

Problem Display
PID: 179916 (B7/4pp1P/6nq/2NK1P2/1pP2p2/4pk1p/2nbp2R/1b4R1 w - - 0 1)

Gross, Erwin

Die Schwalbe, 1977

B7/4pp1P/6nq/2NK1P2/1pP2p2/4pk1p/2nbp2R/1b4R1

#2

8 + 13

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e6+
      • 2.Kd6#
    • 1...f6
      • 2.Ke6#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Kc5#
      • 1...Qf8
        • 2.Rxh3#
      • 1...Sd4
        • 2.Kxd4#
      • 1...Sh4
        • 2.Se5#
        • 2.Rxh3#
      • 1...Se5
        • 2.Sxe5#
      • 1...Sf8
        • 2.Se5#
      • 1...Sh8
        • 2.Se5#
      • 1...e5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Kc5#
      • 1...Qf8
        • 2.Sg5#
      • 1...Sa1
        • 2.Sd4#
      • 1...Se1
        • 2.Sd4#
      • 1...Sa3
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Se5
        • 2.Kxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • P(l);CHECK::B(H)+K(E)
    • P(m);::B(H)+K(E)
  • Tries
    • Try
      • S(D);
      • Threat
        • B(H)+K(E)
      • Vars
        • Q(k);N_GUARD::R(B),XP(g)
        • S(b);::B(H)+K(E),XS(b)
        • S(j);N_GUARD::S(D),XS(j)
        • S(j);N_GUARD::S(D)
      • Refutation
        • P(l);
  • Actual
    • S(D);
    • Threat
      • B(H)+K(E)
    • Vars
      • Q(k);N_GUARD::S(D)
      • S(b);N_GUARD::S(D)
      • S(b);N_GUARD::S(D),XS(b)
      • S(j);::B(H)+K(E),XS(j)
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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).