MESON Chess Problem Database

Problem Display
PID: 270745 (2B1Q3/2r1p3/2p2p2/5R2/4k3/3R1nPp/5KP1/3bN1n1 w - - 0 1)

Marysko, Milos

Probleemblad, 1951

2B1Q3/2r1p3/2p2p2/5R2/4k3/3R1nPp/5KP1/3bN1n1

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Qxc6#
    • 1...Rb7
      • 2.Qxc6#
    • 1...Se2
      • 2.gxf3#
    • 1...Sd4
      • 2.Re3#
    • 1...Se5
      • 2.Rf4#
    • 1...e5
      • 2.Rf4#
  • Tries
    • 1.Qxe7+?
      • 1...Se5
        • 2.Rf4#
      • 1...Rxe7!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg4#
      • 1...Sxe1
        • 2.Qc4#
      • 1...Se2
        • 2.gxf3#
      • 1...Sd2
        • 2.Qe6#
      • 1...Sh2
        • 2.Qc4#
        • 2.Qe6#
      • 1...Sd4
        • 2.Re3#
      • 1...Sh4
        • 2.Qc4#
        • 2.Qe6#
      • 1...Se5
        • 2.Rf4#
      • 1...Sg5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(h);N_GUARD::QAB(H),XP(f)
    • S(b);N_GUARD,S_CUTB(a)::P(C),XS(c)
    • S(c);SBLOCK::R1(D)
    • S(c);N_SPINP(i),SBLOCK::R1(F)
    • P(i);::R1(F)
  • Tries
    • Try
      • Q(H);CHECK,XP(i)
      • Vars
        • S(c);P_SPINS(c)::R1(F)
      • Refutation
        • R(h);XQ(H)
  • Actual
    • Q(H);N_PINP(i)
    • Threat
      • QAR2(H)
    • Vars
      • S(c);N_GUARD,XS(A)::QAR2(H)
      • S(b);N_GUARD,S_CUTB(a)::P(C),XS(c)
      • S(c);N_GUARD::QAR2(H)
      • S(c);SBLOCK::R1(D)
      • S(c);SBLOCK::R1(F)
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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).