MESON Chess Problem Database

Problem Display
PID: 183393 (BBK1R2b/2Q5/4n2N/1p1rn3/R1r1k3/1N3pP1/2P2P2/8 w - - 0 1)

Buchwald, Julius

The Problemist, 1943

BBK1R2b/2Q5/4n2N/1p1rn3/R1r1k3/1N3pP1/2P2P2/8

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sd2#
    • 1...Sc6
      • 2.Qf4#
    • 1...Sd4
      • 2.Sd2#
    • 1...Sc5
      • 2.Qh7#
    • 1...Sg7
      • 2.Rxe5#
  • Tries
    • 1.Rxc4+?
      • 1...Sxc4
        • 2.Qf4#
        • 2.Qh7#
      • 1...Sd4
        • 2.Sd2#
        • 2.Sc5#
        • 2.Rxd4#
        • 2.Qh7#
      • 1...bxc4!
    • 1.Qc5?
      • threat
        • 2.Sd2#
        • 2.Bxd5#
      • 1...Sc6
        • 2.Qe3#
      • 1...Sf4
        • 2.Sd2#
      • 1...Sc7
        • 2.Sd2#
        • 2.Qe3#
      • 1...Sxc5!
  • Keys
    • 1.Ba7!
      • threat
        • 2.Sd2#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sc5
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(b);N_PINQ(G)::S(C)
    • S(f);N_PINQ(G),P_SPINS(g)::QAR1(G)
    • S(g);N_SPINR(b),P_SPINR(e),P_SPINS(f),SBLOCK::S(C)
    • S(g);N_PINQ(G),P_SPINS(f)::QAB(G)
    • S(g);OGATE,P_SPINS(f)::R1(K),XS(f)
  • Tries
    • Try
      • R(E);CHECK,N_SPINQ(G),P_PINR(e),XR(b)
      • Refutation
        • P(d);XR(E)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);N_PINQ(G),P_SPINS(g)::QAR1(G)
        • S(g);P_SPINS(f)::S(C)
      • Refutation
        • S(g);P_SPINS(f),XQ(G)
  • Actual
    • B(I);
    • Threat
      • S(C)
    • Vars
      • S(f);N_PINQ(G),P_SPINS(g)::QAR1(G)
      • S(g);N_PINQ(G),P_SPINS(f)::QAB(G)
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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).