MESON Chess Problem Database

Problem Display
PID: 70802 (7n/pp2rb1P/5kpP/Q5N1/2p2P1n/2N5/8/KB6 w - - 0 1)

Buchwald, Julius

Die Schwalbe, 1932

7n/pp2rb1P/5kpP/Q5N1/2p2P1n/2N5/8/KB6

#2

8 + 9

274 diagrammes 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Re6
      • 2.Sd5#
    • 1...Rc7
      • 2.Qe5#
    • 1...Rd7
      • 2.Qe5#
    • 1...Bd5
      • 2.Sxd5#
    • 1...Be6
      • 2.Sce4#
      • 2.Qe5#
    • 1...Be8
      • 2.Sd5#
    • 1...Bg8
      • 2.hxg8S#
  • Tries
    • 1.Sge4+?
      • 1...Ke6
        • 2.Qd5#
      • 1...Rxe4!
    • 1.Qb6+?
      • 1...Re6
        • 2.Sd5#
      • 1...Be6
        • 2.Sd5#
        • 2.Qd4#
      • 1...axb6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qxh8#
      • 1...Bd5
        • 2.Sxd5#
      • 1...Be6
        • 2.Qd4#
      • 1...Be8
        • 2.Sd5#
      • 1...Bg8
        • 2.hxg8S#
      • 1...Sf5
        • 2.Sce4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(g);N_GUARD::QAB1(E),XR(g)
    • R(g);S_CUTB(h)::S(C)
    • R(g);N_GUARD::QAB1(E)
    • B(h);N_GUARD::S(C),XB(h)
    • B(h);N_GUARD::S(C)
    • B(h);OGATE::PXB(h)=S
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(E)
      • Refutation
        • R(g);XS(F)
    • Try
      • Q(E);CHECK
      • Vars
        • R(g);P_SPINR(g)::S(C)
      • Refutation
        • P(e);XQ(E)
  • Actual
    • Q(E);P_PINR(g)
    • Threat
      • QAB(E),XS(i)
    • Vars
      • B(h);N_GUARD::S(C),XB(h)
      • B(h);::QAB(E)
      • B(h);N_GUARD::S(C)
      • B(h);OGATE::PXB(h)=S
      • S(b);SBLOCK::S(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).