MESON Chess Problem Database

Problem Display
PID: 180326 (2q2b2/1Pp1pPp1/1Pk1p1K1/BRN1P3/BP2P3/8/8/8 w - - 0 1)

Lider, Valentin Viktorovich

diagrammes, 1979

2q2b2/1Pp1pPp1/1Pk1p1K1/BRN1P3/BP2P3/8/8/8

#2

11 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.b8S#
    • 1...Qa8
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Qe8
      • 2.fxe8Q#
      • 2.fxe8B#
    • 1...cxb6
      • 2.bxc8Q#
      • 2.bxc8R#
  • Tries
    • 1.b8Q?
      • 1...cxb6
        • 2.Rxb6#
        • 2.Qxb6#
        • 2.Qxc8#
      • 1...Qa6
        • 2.Qxc7#
        • 2.Qe8#
      • 1...Qb7
        • 2.Qxb7#
        • 2.Qe8#
      • 1...Qd7
        • 2.Qb7#
        • 2.Qa8#
      • 1...Qd8
        • 2.Qb7#
      • 1...Qe8
        • 2.Qxc7#
        • 2.Qb7#
        • 2.Qxe8#
        • 2.fxe8Q#
        • 2.fxe8B#
      • 1...Qxb8!
  • Keys
    • 1.bxc7!
      • 1...Qxb7
        • 2.Rxb7#
      • 1...Qxc7
        • 2.Rb6#
      • 1...Qb8
        • 2.cxb8S#
      • 1...Qd7
        • 2.b8S#
      • 1...Qa8
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Qd8
        • 2.cxd8S#
      • 1...Qe8
        • 2.fxe8Q#
        • 2.fxe8B#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(f);N_GUARD::P=S
    • Q(f);OGATE::PXQ(f)=Q
    • Q(f);OGATE,P_PINP(K)::PXQ(f)=Q
    • P(c);XP(H)::PXQ(f)=Q
  • Tries
    • Try
      • P(J);
      • Vars
        • Q(f);N_GUARD::QAB1(J)
      • Refutation
        • Q(f);XQ(J)
  • Actual
    • P(H);XP(c)
    • Vars
      • Q(f);OGATE,XP(J)::B(A)+R(E),XQ(f)
      • Q(f);SBLOCK,XP(H)::B(A)+R(E),DCHECK
      • Q(f);OGATE::PXQ(f)=S
      • Q(f);N_GUARD::P=S
      • Q(f);OGATE::PXQ(f)=Q
      • Q(f);OGATE,P_PINP(K)::PXQ(f)=Q
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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).