MESON Chess Problem Database

Problem Display
PID: 206672 (8/3K4/3N1pp1/3pk1N1/5r2/8/1Pn1P1QB/6n1 w - - 0 1)

Freitag, Roman

Revista de Sah, 1925

8/3K4/3N1pp1/3pk1N1/5r2/8/1Pn1P1QB/6n1

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe2
      • 2.Sf3#
    • 1...Sf3
      • 2.Sxf3#
    • 1...Sh3
      • 2.Sf3#
    • 1...Sd4
      • 2.Sgf7#
    • 1...d4
      • 2.Sgf7#
      • 2.Qe4#
  • Tries
    • 1.Bxf4+?
      • 1...Kd4
        • 2.Se6#
      • 1...Kxf4!
  • Keys
    • 1.Qh3!
      • 1...Kd4
        • 2.Qc3#
      • 1...Sxe2
        • 2.Sf3#
      • 1...Sxh3
        • 2.Sf3#
      • 1...fxg5
        • 2.Qh8#
      • 1...f5
        • 2.Qh8#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Se1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4
        • 2.Sgf7#
        • 2.Sdf7#
        • 2.Qe3#
      • 1...d4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD,XP(B)::S(E)
    • S(a);N_GUARD::S(E),XS(a)
    • S(a);N_GUARD::S(E)
    • S(b);SBLOCK::S(E)
  • Tries
    • Try
      • B(D);CHECK,XR(c)
      • Vars
        • K(e);S_FLIGHT::S(E)
      • Refutation
        • K(e);S_FLIGHT,XB(D)
  • Actual
    • Q(C);
    • Vars
      • K(e);N_SPINR(c),S_FLIGHT::QAB1(C)
      • S(a);N_GUARD,XP(B)::S(E)
      • S(a);N_GUARD,XQ(C)::S(E)
      • P(f);OGATEB,XS(E)::QAB(C)
      • P(f);OGATEB::QAB(C)
      • S(a);N_GUARD::S(E),XS(a)
      • S(b);N_GUARD::QAR2(C)
      • S(b);N_GUARD::QAR2(C),XS(b)
      • P(d);SBLOCK::QAR1(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).