MESON Chess Problem Database

Problem Display
PID: 21933 (4nQ2/K6B/pN2pP1R/r2Nk3/3bn3/6Pp/1B2b3/4Rr1q w - - 0 1)

Mari, Alberto

1st Prize, Good Companions, 1922

4nQ2/K6B/pN2pP1R/r2Nk3/3bn3/6Pp/1B2b3/4Rr1q

#2

10 + 11

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.gxf4#
    • 1...Sf2
      • 2.Rh5#
    • 1...exd5
      • 2.Qe7#
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sc6#
      • 1...Sxg3
        • 2.Sd3#
      • 1...S4xf6
        • 2.Sd3#
      • 1...Rc5
        • 2.Sd7#
      • 1...Bb5
        • 2.Qc5#
      • 1...Sd2
        • 2.Sd3#
      • 1...Sf2
        • 2.Rh5#
      • 1...Sc3
        • 2.Sd3#
      • 1...Sc5
        • 2.Sc4#
      • 1...Sg5
        • 2.Sd3#
      • 1...S4d6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • R(a);OGATE::P(C),XR(a)
    • S(f);N_GUARD,N_SPINB(e),P_SPINB(c),S_CUTR(a)::R(G)
    • P(j);OGATEB,XS(D)::QAR2(J)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(f);N_SPINB(e),P_SPINB(c),XP(C)::S(D)
      • S(f);N_SPINB(e),P_SPINB(c),XP(F)::S(D)
      • R(g);N_PINS(E)::S(E)
      • B(c);P_SPINS(f),S_CUTR(g)::QAR2(J)
      • S(f);N_SPINB(e),P_SPINB(c)::S(D)
      • S(f);N_GUARD,N_SPINB(e),P_SPINB(c),S_CUTR(a)::R(G)
      • S(f);N_PINS(E),N_SPINB(e),P_SPINB(c)::S(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).