MESON Chess Problem Database

Problem Display
PID: 225714 (6NK/r1p3p1/p1n1ppB1/1N1k1r1p/1P4bQ/2pP4/3b3B/8 w - - 0 1)

Prasil, Frantisek

Praca, 1948

6NK/r1p3p1/p1n1ppB1/1N1k1r1p/1P4bQ/2pP4/3b3B/8

#2

8 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Be4#
    • 1...Rf2
      • 2.Be4#
    • 1...Rf3
      • 2.Be4#
    • 1...Rg5
      • 2.Be4#
    • 1...Bd1
      • 2.Qc4#
      • 2.Qe4#
    • 1...Be2
      • 2.Qc4#
      • 2.Qe4#
    • 1...Bf3
      • 2.Qc4#
    • 1...Bh3
      • 2.Qc4#
      • 2.Qe4#
    • 1...Sd4
      • 2.Se7#
    • 1...Sa5
      • 2.Se7#
    • 1...Se5
      • 2.Se7#
    • 1...Se7
      • 2.Sxe7#
    • 1...Sb8
      • 2.Se7#
    • 1...Sd8
      • 2.Se7#
    • 1...e5
      • 2.Bf7#
  • Tries
    • 1.Sxf6+?
      • 1...Rxf6
        • 2.Be4#
      • 1...gxf6!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qc5#
      • 1...Rxf2
        • 2.Be4#
      • 1...Sxb4
        • 2.Se7#
      • 1...Sd4
        • 2.Se7#
      • 1...e5
        • 2.Bf7#
      • 1...Be3
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(e);OGATE::B(F)
    • B(c);OGATE::QAB1(D)
    • S(h);N_GUARD::S(G)
    • S(h);N_GUARD::S(G),XS(h)
    • P(i);OGATEB::B(F)
  • Tries
    • Try
      • S(G);CHECK,XP(j)
      • Vars
        • R(e);OGATE,XS(G)::B(F)
      • Refutation
        • P(m);XS(G)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • R(e);OGATE,XQ(D)::B(F)
      • S(h);N_GUARD,XP(C)::S(G)
      • S(h);N_GUARD::S(G)
      • P(i);OGATEB::B(F)
      • B(a);OGATE::QAB(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).