MESON Chess Problem Database

Problem Display
PID: 71320 (1B2Rbb1/4q1p1/3Q4/2K5/2N1k1B1/1pPp2n1/1r4P1/3N4 w - - 0 1)

Bograd, Leib

Wiener Schachzeitung, 1937

1B2Rbb1/4q1p1/3Q4/2K5/2N1k1B1/1pPp2n1/1r4P1/3N4

#2

9 + 9

136 Problem Observer 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sf2#
      • 2.Sd2#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Rf2
      • 2.Sxf2#
    • 1...Se2
      • 2.Sf2#
    • 1...Sf5
      • 2.Bf3#
    • 1...d2
      • 2.Sf2#
  • Tries
    • 1.Rxe7+?
      • 1...Be6
        • 2.Rxe6#
        • 2.Qf4#
        • 2.Qe5#
        • 2.Qd4#
        • 2.Qd5#
        • 2.Qc6#
        • 2.Qxe6#
      • 1...Bxe7!
  • Keys
    • 1.Kb6!
      • threat
        • 2.Qd4#
      • 1...Qe6
        • 2.Qc6#
      • 1...Bd5
        • 2.Qf4#
      • 1...Se2
        • 2.Sf2#
      • 1...Sf5
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::S(D),XR(a)
    • R(a);N_GUARD::S(A),XR(a)
    • S(d);S_CUTR(a)::S(A)
    • S(d);SBLOCK::B(E)
    • P(c);S_CUTR(a)::S(A)
  • Tries
    • Try
      • R(I);CHECK,N_SPINQ(G),XQ(f)
      • Refutation
        • B(h);P_PINQ(G),XR(I)
  • Actual
    • K(F);N_SPINQ(G),S_FLIGHT
    • Threat
      • QAR1(G)
    • Vars
      • Q(f);P_PINQ(G),S_CUTB(i)::QAB(G)
      • B(i);SBLOCK::QAR1(G)
      • S(d);S_CUTR(a)::S(A)
      • S(d);SBLOCK::B(E)
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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).