MESON Chess Problem Database

Problem Display
PID: 184779 (2BQ3N/p2Pp1nr/4k2p/7p/2KP1p2/8/8/2n5 w - - 0 1)

Jewetsky, Feodor Orestovich

125 Shakhmaty Zadachi (Eventski), 1908

2BQ3N/p2Pp1nr/4k2p/7p/2KP1p2/8/8/2n5

#2

6 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se8
      • 2.dxe8S#
  • Tries
    • 1.Qb6+?
      • 1...Kf5
        • 2.Qg6#
      • 1...axb6!
    • 1.Qf8?
      • threat
        • 2.d8Q#
        • 2.d8R#
      • 1...Rxh8
        • 2.d8Q#
        • 2.d8R#
      • 1...Sa2
        • 2.d8Q#
        • 2.d8R#
      • 1...Se2
        • 2.d8Q#
        • 2.d8R#
      • 1...Sb3
        • 2.d8Q#
        • 2.d8R#
      • 1...Sd3
        • 2.d8Q#
        • 2.d8R#
      • 1...Sf5
        • 2.d8Q#
        • 2.d8R#
      • 1...Se8
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...f3
        • 2.d8Q#
        • 2.d8R#
      • 1...h4
        • 2.d8Q#
        • 2.d8R#
      • 1...a5
        • 2.d8Q#
        • 2.d8R#
      • 1...a6
        • 2.d8Q#
        • 2.d8R#
      • 1...Kd6!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qg6#
      • 1...Kf5
        • 2.Qg6#
      • 1...Kd6
        • 2.d8Q#
      • 1...Kf6
        • 2.Qg6#
      • 1...Sxe8
        • 2.dxe8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE::PXS(h)=S
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • P(f);XQ(E)
    • Try
      • Q(E);
      • Threat
        • P=Q
      • Vars
        • R(i);XS(F)::P=Q
        • S(a);::P=Q
        • S(h);::P=Q
        • P(b);::P=Q
        • P(c);::P=Q
        • P(f);::P=Q
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(g)
  • Actual
    • Q(E);P_PINP(g)
    • Threat
      • QAR2(E)
    • Vars
      • K(d);N_SPINP(g),S_FLIGHT::QAB1(E)
      • K(d);N_SPINP(g),P-FLIGHT::P=Q
      • K(d);N_SPINP(g),P-FLIGHT::QAR1(E)
      • S(h);N_SPINP(g),OGATE,XQ(E)::PXS(h)=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).