MESON Chess Problem Database

Problem Display
PID: 275038 (2B2R2/2pq1NKQ/2P1P1N1/R1B1nk2/7P/3P1p1P/3r3n/4b1r1 w - - 0 1)

Hovestadt, Friedrich

Die Schwalbe, 1933

2B2R2/2pq1NKQ/2P1P1N1/R1B1nk2/7P/3P1p1P/3r3n/4b1r1

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Sxe5#
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qxe6
      • 2.Sxe5#
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qe8
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qxd3
      • 2.Sd6#
    • 1...Qd4
      • 2.Sxe5#
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qd5
      • 2.Sxe5#
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qd6
      • 2.Sxd6#
      • 2.Sh6#
    • 1...Qd8
      • 2.Sd6#
      • 2.Sh6#
  • Tries
    • 1.Qh5+?
      • 1...Kxe6
        • 2.Qxe5#
      • 1...Rg5!
  • Keys
    • 1.Be3!
      • threat
        • 2.Rxe5#
      • 1...Qxf7+
        • 2.Rxf7#
        • 2.exf7#
      • 1...Rxg6+
        • 2.Qxg6#
      • 1...Kxe6
        • 2.Rxe5#
      • 1...Qd4
        • 2.Sxe5#
        • 2.Sg5#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Sd8#
        • 2.Sh8#
      • 1...Qd5
        • 2.Sxe5#
        • 2.Sd6#
        • 2.Sh6#
      • 1...Qd6
        • 2.Sxd6#
        • 2.Sh6#
      • 1...Bg3
        • 2.Sf4#
      • 1...Sg4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(i);XP(A)::R(M)+S(I),DCHECK
  • Tries
    • Try
      • Q(K);CHECK
      • Vars
        • K(g);OGATE,P_SPINQ(i),S_FLIGHT,XP(G)::QAR1(K),XS(f)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • B(E);P_PINS(f)
    • Threat
      • R1(D),XS(f)
    • Vars
      • R(b);CHECK,OGATE,P_PINS(I),P_SPINR(b),XS(H)::QAB1(K),XR(b)
      • K(g);N_SPINS(f),P_SPINQ(i),S_FLIGHT,XP(G)::R1(D),XS(f)
      • B(a);N_PINS(H),P_PINS(I)::QAB(K)+S(H)
      • S(d);N_PINS(H),P_PINS(I)::QAB(K)+S(H)
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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).