MESON Chess Problem Database

Problem Display
PID: 119831 (8/1r2p3/1p2Kb2/5QPk/7p/4NprP/8/8 w - - 0 1)

Mikan, Ilja

Straz lidu, 1958

8/1r2p3/1p2Kb2/5QPk/7p/4NprP/8/8

#2

5 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.hxg4#
    • 1...Rxg5
      • 2.Qh7#
  • Tries
    • 1.gxf6+?
      • 1...Rg5
        • 2.Qh7#
      • 1...Kh6!
  • Keys
    • 1.Sg4!
      • threat
        • 2.gxf6#
      • 1...Rxg4
        • 2.hxg4#
      • 1...Bxg5
        • 2.Qf7#
      • 1...Ba1
        • 2.g6#
      • 1...Bb2
        • 2.g6#
      • 1...Bc3
        • 2.g6#
      • 1...Bd4
        • 2.g6#
      • 1...Be5
        • 2.g6#
      • 1...Bg7
        • 2.g6#
      • 1...Bh8
        • 2.g6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATE::P(B),XR(b)
    • R(b);P_SPINR(b),SBLOCK,XP(D)::QAR2(C)
  • Tries
    • Try
      • P(D);CHECK,XB(f)
      • Vars
        • R(b);P_SPINR(b),SBLOCK::QAR2(C)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • QAR(C)+P(D),XB(f)
    • Vars
      • R(b);OGATE,XS(A)::P(B),XR(b)
      • B(f);OGATE,P_SPINB(f),SBLOCK,XP(D)::QAB(C)
      • B(f);N_GUARD::QAR(C)+P(D)
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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).