MESON Chess Problem Database

Problem Display
PID: 243458 (1N1Q1b2/4Pr2/7P/1nr1k1NK/b1PR1p2/1Pp1np2/2B2B2/8 w - - 0 1)

Buchwald, Julius

Arbejder-Skak, 1947

1N1Q1b2/4Pr2/7P/1nr1k1NK/b1PR1p2/1Pp1np2/2B2B2/8

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Sd7#
    • 1...Sd1
      • 2.Sd7#
    • 1...Sf1
      • 2.Sd7#
    • 1...Sg2
      • 2.Sd7#
    • 1...Sxc4
      • 2.Sd7#
    • 1...Sg4
      • 2.Sd7#
    • 1...Sf5
      • 2.Sd7#
    • 1...Sa3
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qd6#
    • 1...Sc7
      • 2.Qd6#
  • Tries
    • 1.Sc6+?
      • 1...Kf6
        • 2.exf8Q#
        • 2.exf8R#
        • 2.e8S#
      • 1...Rxc6!
    • 1.Re4+?
      • 1...Kf6
        • 2.Re6#
      • 1...Kf5!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Sxf3#
      • 1...Kxd4
        • 2.Sc6#
      • 1...Sxc2
        • 2.Qe6#
      • 1...Sxd4
        • 2.Sxf7#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rc6
        • 2.Sd7#
      • 1...Rf5
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • K(h);P_PINS(F),S_FLIGHT::S(J)
    • S(b);::S(J)
    • S(b);XP(D)::S(J)
    • S(f);N_GUARD::QAB1(K)
    • S(f);N_GUARD::QAB1(K),XS(f)
  • Tries
    • Try
      • S(J);CHECK
      • Refutation
        • R(g);XS(J)
    • Try
      • R(E);CHECK
      • Vars
        • K(h);OGATE,P_PINS(F),S_FLIGHT::R1(E)
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • Q(K);
    • Threat
      • S(F),XP(c)
    • Vars
      • K(h);P_PINS(F),P_SPINR(g),P_SPINS(b),S_FLIGHT,XR(E)::S(J)
      • S(b);XB(A)::QAR1(K)
      • S(f);SBLOCK,XR(E)::S(F),XR(i)
      • S(f);N_GUARD::QAB1(K),XS(f)
      • R(g);::S(J)
      • R(i);P_PINS(F),SBLOCK::R1(E)
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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).