MESON Chess Problem Database

Problem Display
PID: 122940 (Q7/2bPpN1P/2P1k3/3p3N/6K1/8/8/8 w - - 0 1)

Kotrc, Jan

Wiener Schachzeitung, 1905

Q7/2bPpN1P/2P1k3/3p3N/6K1/8/8/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf7
      • 2.Qg8#
    • 1...Bh2
      • 2.d8S#
    • 1...Bg3
      • 2.d8S#
    • 1...Bf4
      • 2.d8S#
    • 1...Be5
      • 2.d8S#
    • 1...Bd6
      • 2.d8S#
    • 1...Bb8
      • 2.d8S#
    • 1...d4
      • 2.Qa2#
  • Tries
    • 1.Qg8?
      • threat
        • 2.Qg6#
      • 1...Be5
        • 2.d8S#
      • 1...d4!
  • Keys
    • 1.Qb8!
      • 1...Kxf7
        • 2.Qg8#
      • 1...Bxb8
        • 2.d8S#
      • 1...d4
        • 2.Qb3#
      • 1...Ba5
        • 2.Sg5#
      • 1...Bh2
        • 2.Sg5#
        • 2.Sd8#
        • 2.d8S#
      • 1...Bg3
        • 2.Sg5#
        • 2.Sd8#
        • 2.d8S#
      • 1...Bf4
        • 2.Sd8#
        • 2.d8S#
      • 1...Be5
        • 2.Sg5#
        • 2.Sd8#
        • 2.d8S#
      • 1...Bb6
        • 2.Sg5#
      • 1...Bd6
        • 2.d8S#
      • 1...Bd8
        • 2.Sg5#
        • 2.Sxd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
    • B(c);N_GUARD::P=S
    • P(a);OGATEB::QAB(G)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • B(c);N_GUARD::P=S
      • Refutation
        • P(a);
  • Actual
    • Q(G);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
      • B(c);N_GUARD,XQ(G)::P=S
      • P(a);OGATEB::QAB(G)
      • B(c);::S(E)
      • B(c);N_GUARD::P=S
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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).