MESON Chess Problem Database

Problem Display
PID: 87905 (1Q3nbk/r2R4/8/4b3/8/7K/1q6/7R w - - 0 1)

Zilahi, Zoltan

Problemista, 1965

1Q3nbk/r2R4/8/4b3/8/7K/1q6/7R

#2

4 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Qxe5#
    • 1...Qb1
      • 2.Qxe5#
    • 1...Qa2
      • 2.Qxe5#
    • 1...Qc2
      • 2.Qxe5#
    • 1...Qd2
      • 2.Qxe5#
    • 1...Qb4
      • 2.Qxe5#
    • 1...Qb7
      • 2.Qxe5#
  • Keys
    • 1.Kg4+!
      • 1...Qh2
        • 2.Qxe5#
      • 1...Bh2
        • 2.Qxb2#
      • 1...Bh7
        • 2.Qxf8#
      • 1...Sh7
        • 2.Rhxh7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::QAB(D),XB(b)
  • Actual
    • K(B);CHECK,S_FLIGHT
    • Vars
      • Q(a);P_SPINQ(a)::QAB(D),XB(b)
      • B(b);P_SPINB(b),S_CUTB(e),S_CUTS(d)::QAB(D),XQ(a)
      • B(e);P_SPINB(e),P_SPINS(d),S_CUTB(b),S_CUTQ(a)::QAR2(D),XS(d)
      • S(d);N_GUARD,P_SPINB(e),P_SPINS(d)::R1(A),XS(d)
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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).