MESON Chess Problem Database

Problem Display
PID: 262439 (7Q/5N2/2P2R1P/2K1pr1p/7P/5kPb/2p2P1R/2N5 w - - 0 1)

Valuska, Jan

Europe Echecs, 1970

7Q/5N2/2P2R1P/2K1pr1p/7P/5kPb/2p2P1R/2N5

#2

11 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Sg5#
    • 1...e4+
      • 2.Se5#
  • Tries
    • 1.Qc8?
      • 1...e4+
        • 2.Se5#
      • 1...Kg4
        • 2.Sxe5#
        • 2.Qxf5#
      • 1...Rxf6
        • 2.Sg5#
      • 1...Bg2
        • 2.Qxf5#
      • 1...Rf4
        • 2.Sg5#
      • 1...Bf1
        • 2.Qxf5#
      • 1...Bg4
        • 2.Sg5#
      • 1...Ke4!
  • Keys
    • 1.Qh7!
      • 1...e4+
        • 2.Se5#
      • 1...Ke4
        • 2.Sg5#
      • 1...Kg4
        • 2.Qxf5#
      • 1...Rxf6
        • 2.Sxe5#
      • 1...Bg2
        • 2.Qxf5#
      • 1...Rf4
        • 2.Sxe5#
      • 1...Bf1
        • 2.Qxf5#
      • 1...Bg4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::S(J)
    • P(d);CHECK,SBLOCK::S(J)
  • Tries
    • Try
      • Q(K);
      • Vars
        • P(d);CHECK,SBLOCK::S(J)
        • R(e);N_SPINR(e),XR(H)::S(J)
        • B(c);N_GUARD::QAR2(K),XR(e)
        • R(e);::S(J)
        • B(c);SBLOCK::S(J)
      • Refutation
        • K(b);N_SPINR(e),S_FLIGHT
  • Actual
    • Q(K);
    • Vars
      • P(d);CHECK,SBLOCK::S(J)
      • K(b);N_GUARD,S_FLIGHT::S(J)
      • K(b);N_SPINR(e),S_CUTB(c),S_FLIGHT::QAB1(K),XR(e)
      • R(e);N_SPINR(e),XR(H)::S(J),XP(d)
      • B(c);N_GUARD::QAR2(K),XR(e)
      • R(e);::S(J),XP(d)
      • B(c);SBLOCK::S(J)
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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).