MESON Chess Problem Database

Problem Display
PID: 287091 (4N1b1/5BP1/2Qpp2r/rR1nnk1P/3Pp1pP/1q4p1/6N1/4R2K w - - 0 1)

Buchwald, Julius

The Problemist, 1952

4N1b1/5BP1/2Qpp2r/rR1nnk1P/3Pp1pP/1q4p1/6N1/4R2K

#2

11 + 12

6490 yacpdb 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Sxd6#
    • 1...Sc3
      • 2.Rf1#
    • 1...Sb4
      • 2.Qxe4#
    • 1...Sf4
      • 2.Qxe4#
    • 1...Sb6
      • 2.Qxe4#
    • 1...Sf6
      • 2.Sxd6#
    • 1...Sc7
      • 2.Qxe4#
    • 1...Se7
      • 2.Qxe4#
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Qxe5#
      • 1...Sxf7
        • 2.Qf4#
      • 1...Sd3
        • 2.Se3#
      • 1...Sf3
        • 2.Qf4#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sg6
        • 2.Qxe6#
      • 1...Sd7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • R(k);SBLOCK::S(K),XP(i)
    • S(f);N_GUARD,P_SPINS(g),S_CUTQ(a)::R(A)
    • S(f);OGATE,P_SPINS(g)::QAB1(H),XP(c)
    • S(f);P_SPINS(g),SBLOCK::S(K),XP(i)
  • Actual
    • Q(H);XP(i)
    • Threat
      • QAR1(H),XS(g)
    • Vars
      • S(g);OGATE,P_SPINS(f),XB(I)::QAR1(H)
      • S(g);P_SPINS(f),S_CUTQ(a)::S(C)
      • S(g);OGATE,P_SPINS(f)::QAR1(H)
      • S(g);P_SPINS(f),S_CUTR(k)::QAB1(H),XP(j)
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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).