MESON Chess Problem Database

Problem Display
PID: 86229 (3R1Bb1/4N3/1pp5/1pkq1RQn/1n3p2/8/1P1NB1p1/3K4 w - - 0 1)

Baev, Georgy S

Loshinski, Lev Ilich

Zadachi i Etyudi, 1930

3R1Bb1/4N3/1pp5/1pkq1RQn/1n3p2/8/1P1NB1p1/3K4

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Se4#
      • 2.Sg6#
      • 2.Sc8#
      • 2.Sxg8#
    • 1...Qxf5
      • 2.Se4#
      • 2.Sxf5#
      • 2.Sg6#
      • 2.Sc8#
      • 2.Sxg8#
    • 1...g1Q+
      • 2.Qxg1#
    • 1...g1S
      • 2.Qxg1#
    • 1...g1B
      • 2.Qxg1#
    • 1...g1R+
      • 2.Qxg1#
    • 1...f3
      • 2.Qe3#
  • Tries
    • 1.Rfxd5+?
      • 1...Bxd5
        • 2.Sb3#
        • 2.Sf5#
      • 1...cxd5
        • 2.Sb3#
      • 1...Sxd5!
  • Keys
    • 1.Re5!
      • threat
        • 2.Sf5#
      • 1...g1Q+
        • 2.Qxg1#
      • 1...g1R+
        • 2.Qxg1#
      • 1...Kd4
        • 2.Sb3#
      • 1...Qxe5
        • 2.Se4#
        • 2.Sg6#
        • 2.Sc8#
        • 2.Sxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • P(a);CHECK,OGATE::QAB(F),XQ(a)
    • P(a);OGATE::QAB(F),XS(a)
    • P(a);OGATE::QAB(F),XB(a)
    • P(a);CHECK,OGATE::QAB(F),XR(a)
    • P(c);OGATE::QAB(F)
  • Tries
    • Try
      • R(E);CHECK,N_SPINS(C),XQ(f)
      • Vars
        • P(i);P_SPINP(i),XR(E)::S(C)
      • Refutation
        • S(b);P_SPINS(b),XR(E)
  • Actual
    • R(E);
    • Threat
      • B(I)+S(G)
    • Vars
      • P(a);CHECK,OGATE::QAB(F),XQ(a)
      • P(a);CHECK,OGATE::QAB(F),XR(a)
      • K(e);N_PINS(C),S_FLIGHT::S(C)
HTML5 logo

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).