MESON Chess Problem Database

Problem Display
PID: 250163 (Q6B/4p3/4bq2/Nnp4r/2Nk3r/1R1p1p1n/3P4/5KbB w - - 0 1)

Golubev, Giorgi P

4th HM., 64 Shakhmatnoe obozrenie, 1927

Q6B/4p3/4bq2/Nnp4r/2Nk3r/1R1p1p1n/3P4/5KbB

#2

8 + 12

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.dxe3#
    • 1...Sc3
      • 2.dxc3#
  • Tries
    • 1.Bxf6+?
      • 1...Re5
        • 2.Bxe5#
      • 1...exf6!
  • Keys
    • 1.Qxf3!
      • threat
        • 2.Rxd3#
      • 1...Bxc4
        • 2.Sc6#
      • 1...Be3
        • 2.dxe3#
      • 1...Bf5
        • 2.Qd5#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sf4
        • 2.Qe4#
      • 1...Sc3
        • 2.dxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE::P(C),XB(a)
    • S(g);OGATE::P(C),XS(g)
  • Tries
    • Try
      • B(H);CHECK,XQ(k)
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::B(H),XR(i)
      • Refutation
        • P(l);XB(H)
  • Actual
    • Q(G);P_SPINQ(G),XP(c)
    • Threat
      • R1(D),XP(b)
    • Vars
      • B(j);SBLOCK,XS(E)::S(F)
      • B(a);OGATE::P(C),XB(a)
      • B(j);N_PINQ(G)::QAR1(G)
      • S(d);N_PINQ(G)::QAB1(G)
      • S(d);N_PINQ(G)::QAR1(G)
      • S(g);OGATE::P(C),XS(g)
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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).