MESON Chess Problem Database

Problem Display
PID: 104350 (5B2/3K2N1/B2NQ3/R2Pp3/1p1k4/1P5q/3P2b1/8 w - - 0 1)

Istokovics, Ferenc

Radjanska Ukraina, 1981

5B2/3K2N1/B2NQ3/R2Pp3/1p1k4/1P5q/3P2b1/8

#2

10 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Sgxf5#
    • 1...Qxe6+
      • 2.Sxe6#
    • 1...Qh1
      • 2.Sgf5#
    • 1...Qh2
      • 2.Sgf5#
    • 1...Qxb3
      • 2.Sgf5#
    • 1...Qc3
      • 2.Sgf5#
    • 1...Qe3
      • 2.Sgf5#
    • 1...Qg3
      • 2.Sgf5#
    • 1...Qh4
      • 2.Sgf5#
    • 1...Qh6
      • 2.Sgf5#
    • 1...Qh8
      • 2.Sgf5#
    • 1...Bxd5
      • 2.Rxd5#
  • Keys
    • 1.Qf5!
      • threat
        • 2.Se6#
      • 1...Qxf5+
        • 2.Sgxf5#
      • 1...Bxd5
        • 2.Sb5#
      • 1...Qh6
        • 2.Qd3#
      • 1...Qh7
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::S(I),XQ(b)
    • Q(b);CHECK,XQ(G)::S(I),XQ(b)
    • Q(b);N_GUARD,N_PINQ(G)::S(I)
    • Q(b);N_GUARD,N_PINQ(G),XP(B)::S(I)
    • B(a);OGATE,XP(D)::R1(C),XB(a)
  • Actual
    • Q(G);
    • Threat
      • S(I)
    • Vars
      • Q(b);CHECK,XQ(G)::S(I),XQ(b)
      • B(a);SBLOCK,XP(D)::S(F)
      • Q(b);N_PINQ(G)::QAR1(G)
      • Q(b);N_PINQ(G),P_PINS(I)::QAB(G)
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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).