MESON Chess Problem Database

Problem Display
PID: 275270 (r2R2q1/5ppn/2PP2p1/P3k1rn/R3N2B/3p1QpP/B5N1/5K2 w - - 0 1)

Gevers, Raymond

The Problemist, 1934

r2R2q1/5ppn/2PP2p1/P3k1rn/R3N2B/3p1QpP/B5N1/5K2

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxf4#
    • 1...S5f6
      • 2.Qf4#
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qc5#
      • 1...Rf5+
        • 2.Sf2#
      • 1...Kf5
        • 2.Qc5#
      • 1...Rxa5
        • 2.Rxa5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...S5f6
        • 2.Qf4#
      • 1...S7f6
        • 2.Qxg5#
      • 1...f5
        • 2.Qd4#
      • 1...f6
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAB1(D),XS(e)
    • S(e);N_GUARD::QAB1(D)
  • Actual
    • Q(D);
    • Threat
      • QAR2(D)
    • Vars
      • R(d);CHECK,SBLOCK::QAR(D)+S(G)
      • K(c);P-FLIGHT::QAR(D)
      • R(j);OGATE,XP(I)::R(F),XR(j)
      • S(e);N_GUARD::QAB1(D),XS(e)
      • S(e);N_GUARD::QAB1(D)
      • S(i);N_GUARD,S_CUTP(g)::QAR2(D),XR(d)
      • P(g);SBLOCK::QAB1(D)
      • P(g);SBLOCK::QAR(D)+S(G),XP(b)
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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).