MESON Chess Problem Database

Problem Display
PID: 219907 (4N3/5R2/r5r1/pR4n1/4kn2/1bPp4/3K4/3Q2N1 w - - 0 1)

Bajtay, Jozsef

Riczu, Lajos

Land og Folk, 1975

4N3/5R2/r5r1/pR4n1/4kn2/1bPp4/3K4/3Q2N1

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Qxa4#
    • 1...Sfh3
      • 2.Qe1#
    • 1...Sh5
      • 2.Qe1#
    • 1...Sfe6
      • 2.Qe1#
    • 1...Sf3+
      • 2.Qxf3#
    • 1...Sgh3
      • 2.Qf3#
    • 1...Sge6
      • 2.Qf3#
    • 1...Sxf7
      • 2.Qf3#
    • 1...Sh7
      • 2.Qf3#
  • Keys
    • 1.Re7+!
      • 1...Rae6
        • 2.Sd6#
      • 1...Rge6
        • 2.Sf6#
      • 1...Be6
        • 2.Qa4#
      • 1...Sfe6
        • 2.Qg4#
      • 1...Sge6
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(a);OGATE::QAR(A),XB(a)
    • S(d);N_GUARD::QAR(A)
    • S(f);CHECK,N_GUARD::QAB1(A),XS(f)
    • S(f);N_GUARD::QAB1(A)
    • S(f);N_GUARD,XR(F)::QAB1(A)
  • Actual
    • R(F);CHECK
    • Vars
      • R(g);P_SPINR(g)::S(G)
      • R(h);P_SPINR(h)::S(G)
      • B(a);OGATE,P_SPINB(a)::QAR(A)
      • S(d);P_SPINS(d),S_CUTB(a),S_CUTR(g),S_CUTR(h),S_CUTS(f)::QAR2(A)
      • S(f);P_SPINS(f)::QAB1(A)
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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).