MESON Chess Problem Database

Problem Display
PID: 203358 (6R1/7p/4Q3/4P1pp/1RB3PP/2P4k/4PP2/7K w - - 0 1)

Gaikovich, V

Shakhmaty, 1924

6R1/7p/4Q3/4P1pp/1RB3PP/2P4k/4PP2/7K

#2

11 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...gxh4
      • 2.gxh5#
      • 2.g5#
  • Tries
    • 1.Rxg5?
      • 1...Kxh4
        • 2.Rxh5#
      • 1...hxg4
        • 2.Qxg4#
      • 1...h6!
    • 1.gxh5+?
      • 1...g4
        • 2.Qxg4#
      • 1...Kxh4!
  • Keys
    • 1.Qh6!
      • 1...Kxg4
        • 2.Be6#
      • 1...Kxh4
        • 2.Qxh5#
      • 1...gxh4
        • 2.Qe3#
      • 1...hxg4
        • 2.hxg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(K);XP(b)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(H)::R1(K),XP(c)
        • P(c);OGATE,P_SPINP(c),XP(G)::QAB1(J),XP(c)
      • Refutation
        • P(d);
    • Try
      • P(G);CHECK,XP(c)
      • Vars
        • P(b);P_SPINP(b)::QAB1(J),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XP(H)
  • Actual
    • Q(J);
    • Vars
      • K(a);OGATEB,P_SPINP(b),S_FLIGHT,XP(G)::R(E)+B(F),DCHECK
      • K(a);OGATEB,P-FLIGHT,P_SPINP(c),XP(H)::QAR1(J),XP(c)
      • P(b);OGATE,SBLOCK,XP(H)::QAR(J)
      • P(c);SBLOCK,XP(G)::QAR(J)+P(H),XP(b)
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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).