MESON Chess Problem Database

Problem Display
PID: 262482 (7n/3pN2K/3Q1pp1/2Rn4/1q2kpN1/2p3b1/b3PB2/8 w - - 0 1)

Riczu, Lajos

Europe Echecs, 1972

7n/3pN2K/3Q1pp1/2Rn4/1q2kpN1/2p3b1/b3PB2/8

#2

7 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxd5#
    • 1...Se3
      • 2.Sxf6#
      • 2.Qd3#
    • 1...Sb6
      • 2.Sxf6#
      • 2.Qd3#
    • 1...Sc7
      • 2.Sxf6#
      • 2.Qd3#
    • 1...Sxe7
      • 2.Sxf6#
      • 2.Qd3#
    • 1...f5
      • 2.Qe5#
  • Keys
    • 1.Qxf6!
      • threat
        • 2.Qe5#
      • 1...Sxf6+
        • 2.Sxf6#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qb8
        • 2.Qd4#
      • 1...Sf7
        • 2.Qxg6#
      • 1...f3
        • 2.Qxf3#
      • 1...d6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB1(E),XS(g)
    • P(h);N_GUARD::QAR1(E)
  • Actual
    • Q(E);XP(h)
    • Threat
      • QAR1(E)
    • Vars
      • S(g);CHECK,XQ(E)::S(C),XS(g)
      • Q(d);N_GUARD::QAR1(E),XQ(d)
      • Q(d);N_GUARD::QAR1(E)
      • S(k);N_GUARD::QAB(E),XP(i)
      • P(f);OGATE::QAB1(E),XP(f)
      • P(j);N_GUARD::QAR2(E)
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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).