MESON Chess Problem Database

Problem Display
PID: 136856 (4Q3/4B3/8/8/8/2N5/3k4/4N1K1 w - - 0 1)

Hronec, Jaroslav

Asder, 1976

4Q3/4B3/8/8/8/2N5/3k4/4N1K1

#2

5 + 1

5454 Near Snap 2010
6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe1
      • 2.Bg5#
  • Tries
    • 1.Qb5?
      • 1...Kc1
        • 2.Bg5#
      • 1...Kxe1
        • 2.Qe2#
      • 1...Kxc3
        • 2.Qb4#
      • 1...Ke3!
    • 1.Qd7+?
      • 1...Kc1
        • 2.Ba3#
      • 1...Kxe1
        • 2.Bh4#
        • 2.Qd1#
      • 1...Ke3
        • 2.Bg5#
      • 1...Kxc3!
    • 1.Qd8+?
      • 1...Kc1
        • 2.Ba3#
      • 1...Kxe1
        • 2.Bh4#
        • 2.Qd1#
      • 1...Ke3
        • 2.Bg5#
      • 1...Kxc3!
  • Keys
    • 1.Qa4!
      • 1...Kc1
        • 2.Qc2#
      • 1...Kxe1
        • 2.Qd1#
      • 1...Kxc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Bg5#

Anticipated by 22391(1970)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XS(A)::QAR(E)+B(D)
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);S_FLIGHT,XS(A)::QAR1(E)
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT,XS(A)::QAR1(E)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • K(a);S_FLIGHT::B(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).