MESON Chess Problem Database

Problem Display
PID: 200132 (5nNb/rb3P2/1p2p1R1/p3k3/4P3/B3P1n1/BKQ1p2p/4N2q w - - 0 1)

Mochalkin, Oleksandr Viktorovich

Valtonen, Kari

Suomen Shakki, 1990

5nNb/rb3P2/1p2p1R1/p3k3/4P3/B3P1n1/BKQ1p2p/4N2q

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qg1
      • 2.Sf3#
    • 1...Sf1
      • 2.Rg5#
    • 1...Sh5
      • 2.Rg5#
    • 1...Sd7
      • 2.Rxe6#
    • 1...Sh7
      • 2.Rxe6#
  • Keys
    • 1.Sh6!
      • threat
        • 2.Sg4#
      • 1...Qxe4
        • 2.Qc7#
      • 1...Bxe4
        • 2.Qc3#
      • 1...Sxe4
        • 2.Sd3#
      • 1...Qf3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD::S(A)
    • S(d);N_GUARD::R(H)
    • S(k);N_GUARD::R1(H),XP(h)
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • Q(a);SBLOCK,XP(G)::QAB(D)
      • B(j);SBLOCK,XP(G)::QAB(D)
      • S(d);SBLOCK,XP(G)::S(A)
      • Q(a);N_GUARD::S(A),XQ(a)
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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).