MESON Chess Problem Database

Problem Display
PID: 144048 (3Q4/7K/2p5/7R/3bkp2/RNr2p1N/B1n1pq2/2Bn4 w - - 0 1)

Birnov, Zinovy Markovich

Magyar Sakkvilag, 1930

3Q4/7K/2p5/7R/3bkp2/RNr2p1N/B1n1pq2/2Bn4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sc5#
    • 1...Re3
      • 2.Sd2#
    • 1...Rc4
      • 2.Sd2#
    • 1...Rc5
      • 2.Sd2#
    • 1...Sde3
      • 2.Sxf2#
    • 1...Sce3
      • 2.Qxd4#
  • Tries
    • 1.Qd5+?
      • 1...Kd3
        • 2.Sc5#
        • 2.Sxf4#
      • 1...cxd5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Sc5#
      • 1...Rc5
        • 2.Sd2#
      • 1...Be5
        • 2.Sg5#
      • 1...Sde3
        • 2.Sxf2#
      • 1...Sce3
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(h);P_SPINB(g),S_FLIGHT::S(D)
    • R(e);::S(D)
    • S(a);N_GUARD,S_CUTB(g)::S(E),XQ(d)
    • S(b);N_GUARD,S_CUTQ(d)::QAR1(H),XB(g)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • P(j);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • K(h);P_SPINB(g),S_FLIGHT::S(D)
      • R(e);::S(D)
      • B(g);SBLOCK::S(E)
      • S(a);N_GUARD,S_CUTB(g)::S(E),XQ(d)
      • S(b);N_GUARD,S_CUTQ(d)::QAR1(H),XB(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).