MESON Chess Problem Database

Problem Display
PID: 149913 (7N/1q1pBP2/1r1r4/Q2bkP2/2P1P1Pp/N3PP2/1b6/3K4 w - - 0 1)

Busack, Otto

Die Schwalbe, 1941

7N/1q1pBP2/1r1r4/Q2bkP2/2P1P1Pp/N3PP2/1b6/3K4

#2

12 + 8

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Qxd5#
    • 1...Bc1
      • 2.Qc3#
    • 1...Bxa3
      • 2.Qc3#
    • 1...Bc3
      • 2.Qxc3#
  • Tries
    • 1.f8Q?
      • threat
        • 2.Sf7#
      • 1...Rb5
        • 2.Bxd6#
      • 1...Rf6!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qh2#
      • 1...Bxc4
        • 2.Sxc4#
      • 1...Bxe4
        • 2.f4#
      • 1...Bxf7
        • 2.Sxf7#
      • 1...Bc6
        • 2.Qxd6#
      • 1...Be6
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD,S_CUTQ(g)::QAR1(H),XB(c)
    • B(a);N_GUARD::QAB(H)
    • B(a);N_GUARD,XS(B)::QAB(H)
    • B(a);N_GUARD::QAB(H),XB(a)
  • Tries
    • Try
      • P(K);
      • Threat
        • S(L)
      • Vars
        • R(e);N_GUARD,N_SPINB(c)::B(J),XR(f)
      • Refutation
        • R(f);
  • Actual
    • Q(H);N_PINB(c)
    • Threat
      • QAB(H)
    • Vars
      • B(c);P_PINQ(H),XP(E)::S(B),XB(c)
      • B(c);P_PINQ(H),SBLOCK,XP(F)::P(D)
      • B(c);P_PINQ(H),XP(K)::S(L),XB(c)
      • B(c);OGATE,P_PINQ(H)::QAB1(H),XR(f)
      • B(c);P_PINQ(H),S_CUTR(f)::S(L)
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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).