MESON Chess Problem Database

Problem Display
PID: 109477 (1r5k/3p2pp/7N/4QP2/8/1r6/1p6/1K6 w - - 0 1)

Svoboda, Rudolf

Sachova skladba, 1986

1r5k/3p2pp/7N/4QP2/8/1r6/1p6/1K6

#2

4 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qxb8#
    • 1...Rd3
      • 2.Qxb8#
    • 1...Rf3
      • 2.Qxb8#
    • 1...Rg3
      • 2.Qxb8#
    • 1...Rh3
      • 2.Qxb8#
    • 1...Rb4
      • 2.Qe8#
    • 1...Rb5
      • 2.Qe8#
    • 1...Rb6
      • 2.Qe8#
    • 1...Rb7
      • 2.Qe8#
    • 1...Re8
      • 2.Qxe8#
    • 1...Rg8
      • 2.Sf7#
  • Keys
    • 1.f6!
      • threat
        • 2.fxg7#
      • 1...gxf6
        • 2.Qxf6#
      • 1...gxh6
        • 2.f7#
      • 1...Rg3
        • 2.Qxb8#
      • 1...Rg8
        • 2.Sf7#
      • 1...g5
        • 2.f7#
      • 1...g6
        • 2.f7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::QAR(B),XR(f)
    • R(f);N_GUARD::QAR(B)
    • R(f);N_GUARD::QAR(B),XR(f)
    • R(f);SBLOCK::S(D)
  • Actual
    • P(C);N_PINP(d)
    • Threat
      • P(C),XP(d)
    • Vars
      • P(d);OGATE,P_SPINP(d),XP(C)::QAB(B),XP(d)
      • P(d);XS(D)::QAB(B)+P(C)
      • R(b);N_GUARD::QAR(B),XR(f)
      • R(f);SBLOCK::S(D)
      • P(d);::QAB(B)+P(C)
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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).