MESON Chess Problem Database

Problem Display
PID: 242969 (1K1Nr3/R1N1k1Pn/Q1p1rpP1/8/4pb2/7b/8/3R4 w - - 0 1)

Buchwald, Julius

Die Schwalbe, 1929

1K1Nr3/R1N1k1Pn/Q1p1rpP1/8/4pb2/7b/8/3R4

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Se6#
    • 1...Bc1
      • 2.Sb5#
      • 2.Sxe6#
      • 2.Sa8#
    • 1...Bg5
      • 2.Sb5#
      • 2.Sxe6#
      • 2.Sa8#
    • 1...Bh6
      • 2.Sb5#
      • 2.Sxe6#
      • 2.Sa8#
    • 1...Bxc7+
      • 2.Rxc7#
    • 1...Sf8
      • 2.g8S#
  • Keys
    • 1.Qc8!
      • threat
        • 2.Rd7#
        • 2.Qd7#
      • 1...Bxc7+
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...Rxd8
        • 2.Qxd8#
      • 1...Bd2
        • 2.Sb5#
      • 1...f5
        • 2.Qxe6#
      • 1...Re5
        • 2.Sce6#
        • 2.Sxc6#
      • 1...Rd6
        • 2.Sd5#
      • 1...Bd6
        • 2.Sxc6#
      • 1...Sf8
        • 2.g8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(e);N_PINS(E),P_PINS(H)::R(D)+S(E)
    • B(c);CHECK,OGATE,P_PINS(H),P_SPINB(c),XS(E)::R(D),XB(c)
    • S(h);SBLOCK,S_CUTR(i)::P=S
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(i);OGATE,P_PINQ(B),XS(H)::QAB1(B),XR(i)
      • B(c);N_PINS(E)::R(D)+S(E)
      • P(f);S_CUTB(a)::QAR1(B),XR(e)
      • R(e);N_PINS(E),SBLOCK::R(D)+S(E),DCHECK
      • B(c);S_CUTR(e)::S(H),XP(d)
      • S(h);SBLOCK,S_CUTR(i)::P=S
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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).