MESON Chess Problem Database

Problem Display
PID: 106195 (6K1/n2pp3/2N2p1B/r4k2/pQ3N1R/6n1/p7/1b5B w - - 0 1)

Pallasz, Edward

Praca, 1954

6K1/n2pp3/2N2p1B/r4k2/pQ3N1R/6n1/p7/1b5B

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sd4#
    • 1...e5
      • 2.Se7#
  • Tries
    • 1.Qxe7?
      • threat
        • 2.Sd4#
        • 2.Qxd7#
        • 2.Qh7#
      • 1...Sxh1
        • 2.Sd4#
        • 2.Qh7#
      • 1...dxc6
        • 2.Qe6#
      • 1...a1Q
        • 2.Qxd7#
        • 2.Qh7#
      • 1...a1B
        • 2.Qxd7#
        • 2.Qh7#
      • 1...Rd5
        • 2.Qh7#
      • 1...Re5
        • 2.Sd4#
        • 2.Qh7#
      • 1...Se2
        • 2.Qxd7#
        • 2.Qh7#
      • 1...Sb5
        • 2.Qxd7#
        • 2.Qh7#
      • 1...d5
        • 2.Sd4#
        • 2.Qe6#
        • 2.Qd7#
        • 2.Qh7#
      • 1...d6
        • 2.Sd4#
        • 2.Qe6#
        • 2.Qd7#
        • 2.Qh7#
      • 1...Sxc6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qg4#
      • 1...Ke6
        • 2.Sd4#
      • 1...Kg6
        • 2.Sxe7#
      • 1...Se4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(e);SBLOCK::S(E)
    • P(j);SBLOCK::S(E)
  • Tries
    • Try
      • Q(B);XP(j)
      • Threat
        • DUALS(3)
      • Vars
        • P(i);N_GUARD,XS(E)::QAB1(B)
        • R(e);::QAB(B)
      • Refutation
        • S(h);XS(E)
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • K(f);S_FLIGHT::S(E)
      • K(f);S_FLIGHT::S(E),XP(j)
      • S(c);N_GUARD::QAB1(B),XS(c)
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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).