MESON Chess Problem Database

Problem Display
PID: 272715 (N1R3B1/3p1rq1/R7/pp1kppp1/4n3/2BPPQp1/3p2P1/3N1K2 w - - 0 1)

Kish, Alexander

Die Schwalbe, 1932

N1R3B1/3p1rq1/R7/pp1kppp1/4n3/2BPPQp1/3p2P1/3N1K2

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qh8
      • 2.Bxf7#
    • 1...f4
      • 2.Qxe4#
      • 2.dxe4#
  • Tries
    • 1.Bb4?
      • threat
        • 2.Sc3#
        • 2.Sc7#
        • 2.Rd6#
        • 2.Rc5#
      • 1...d6
        • 2.Sc7#
        • 2.Rxd6#
      • 1...Qf6
        • 2.Sc3#
        • 2.Sc7#
        • 2.Rc5#
      • 1...Qh6
        • 2.Sc3#
        • 2.Sc7#
        • 2.Rc5#
      • 1...Qf8
        • 2.Sc3#
        • 2.Sc7#
      • 1...Qg6
        • 2.Sc3#
        • 2.Sc7#
        • 2.Rc5#
      • 1...axb4!
    • 1.Bd4?
      • threat
        • 2.Sc3#
        • 2.Sc7#
        • 2.Rc5#
      • 1...d6
        • 2.Sc7#
      • 1...b4
        • 2.Sc7#
        • 2.Rc5#
      • 1...Qf8
        • 2.Sc3#
        • 2.Sc7#
      • 1...exd4!
  • Keys
    • 1.Qxf5!
      • threat
        • 2.dxe4#
      • 1...Sxc3
        • 2.Sxc3#
      • 1...Sf2
        • 2.Qxd7#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sd6
        • 2.Sb6#
      • 1...Sf6
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(l);N_GUARD::B(K),XR(k)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(4)
      • Refutation
        • P(d);XB(D)
    • Try
      • B(D);
      • Threat
        • DUALS(3)
      • Vars
        • P(j);::S(I)
      • Refutation
        • P(g);XB(D)
  • Actual
    • Q(G);N_PINS(c),P_PINP(g),P_SPINQ(G),XP(h)
    • Threat
      • P(E),XS(c)
    • Vars
      • S(c);XB(D)::S(A),XS(c)
      • S(c);N_PINQ(G)::QAR2(G),XP(j)
      • S(c);SBLOCK::S(I)
      • S(c);N_PINQ(G)::QAR1(G),XP(g)
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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).