MESON Chess Problem Database

Problem Display
PID: 178998 (1B3R2/K1Q3p1/5P2/p2pNk2/q3npR1/2pn3P/4N3/1B1r4 w - - 0 1)

Pedersen, Eigil Palle

Magasinet, 1949

1B3R2/K1Q3p1/5P2/p2pNk2/q3npR1/2pn3P/4N3/1B1r4

#2

10 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Sd4#
      • 2.Qd7#
      • 2.Qc8#
    • 1...Qb3
      • 2.Sd4#
      • 2.Qd7#
      • 2.Qc8#
    • 1...Qb5
      • 2.Sd4#
    • 1...Qc6
      • 2.Sd4#
    • 1...Qd7
      • 2.Sd4#
      • 2.Qxd7#
    • 1...Qe8
      • 2.Sd4#
    • 1...Qa1
      • 2.Sd4#
      • 2.Qd7#
      • 2.Qc8#
    • 1...Qa2
      • 2.Sd4#
      • 2.Qd7#
      • 2.Qc8#
    • 1...Qa3
      • 2.Sd4#
      • 2.Qd7#
      • 2.Qc8#
    • 1...Qb4
      • 2.Qd7#
      • 2.Qc8#
    • 1...Qc4
      • 2.Qd7#
    • 1...Qd4+
      • 2.Sxd4#
    • 1...Sxe5
      • 2.Qxe5#
  • Tries
    • 1.fxg7+?
      • 1...Ke6
        • 2.Qf7#
        • 2.g8Q#
        • 2.g8B#
      • 1...Sf6!
  • Keys
    • 1.Qc8+!
      • 1...Qd7+
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(d);N_GUARD::S(B)
    • Q(d);N_GUARD::QAB(H)
    • Q(d);CHECK,N_GUARD::S(B),XQ(d)
    • S(c);OGATE,P_SPINS(e),XS(E)::QAR1(H),XS(c)
  • Tries
    • Try
      • P(F);CHECK,XP(j)
      • Refutation
        • S(e);P_SPINS(c)
  • Actual
    • Q(H);CHECK
    • Vars
      • Q(d);CHECK,N_GUARD,P_SPINQ(d)::QAB(H),XQ(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).