MESON Chess Problem Database

Problem Display
PID: 121292 (2bRN3/1p1n2Q1/1p3P2/1P2k3/1P5P/1P3K2/4P3/8 w - - 0 1)

Neunivako, Pavel Efimovich

Shakhmatny Listok, 1927

2bRN3/1p1n2Q1/1p3P2/1P2k3/1P5P/1P3K2/4P3/8

#2

10 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf6
      • 2.Qxf6#
  • Tries
    • 1.Qe7+?
      • 1...Kd5
        • 2.Qd6#
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd4!
  • Keys
    • 1.Sc7!
      • 1...Kd4
        • 2.f7#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kd6
        • 2.Qg3#
      • 1...Sxf6
        • 2.Rd5#
      • 1...Sc5
        • 2.Rd5#
      • 1...Sb8
        • 2.Rd5#
      • 1...Sf8
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(d);OGATE,P_SPINS(d),XP(G)::QAB1(H),XS(d)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(H)
      • Refutation
        • K(a);P_SPINS(d),S_FLIGHT
  • Actual
    • S(J);
    • Vars
      • K(a);P_SPINS(d),S_FLIGHT::QAB(H)+P(G)
      • K(a);P-FLIGHT::QAR1(H)
      • K(a);P_SPINS(d),S_FLIGHT::QAB(H)
      • S(d);OGATE,P_SPINS(d),XP(G)::R1(I)
      • S(d);OGATE::R1(I)
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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).