MESON Chess Problem Database

Problem Display
PID: 140347 (5brB/Q3p2q/2P3np/4P2N/2P1k1Bp/3p3P/3Pp1n1/K3N2b w - - 0 1)

Zagoruyko, Leonid Ivanovich

1/2 Prize, Magyar Sakkvilag, 1948

5brB/Q3p2q/2P3np/4P2N/2P1k1Bp/3p3P/3Pp1n1/K3N2b

#2

11 + 12

113 Shakhmaty v SSSR 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe1
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...S2f4
      • 2.Qe3#
  • Keys
    • 1.Qd7!
      • threat
        • 2.Bf3#
        • 2.Bf5#
        • 2.Qxd3#
        • 2.Qd5#
      • 1...Qxh8
        • 2.Qd5#
      • 1...Rxh8
        • 2.Qd5#
      • 1...Sxe1
        • 2.Qd5#
      • 1...Sxe5
        • 2.Qd5#
      • 1...Sxh8
        • 2.Qd5#
      • 1...Qg7
        • 2.Qd5#
      • 1...Rg7
        • 2.Qd5#
      • 1...Bg7
        • 2.Qd5#
      • 1...Qf7
        • 2.Qxd3#
      • 1...Se3
        • 2.Qxd3#
      • 1...S2f4
        • 2.Bf5#
      • 1...S6f4
        • 2.Bf3#
      • 1...e6
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD,XS(B)::QAR1(J)
    • S(c);N_GUARD::QAR1(J),XS(c)
    • S(c);N_GUARD::QAR1(J)
  • Actual
    • Q(J);
    • Threat
      • DUALS(4)
    • Vars
      • Q(j);P_PINP(G),XB(K)::QAB1(J)
      • R(l);XB(K)::QAB1(J)
      • S(c);XS(B)::QAB1(J)
      • S(g);XP(G)::QAB1(J)
      • S(g);XB(K)::QAB1(J)
      • Q(j);P_PINP(G)::QAB1(J)
      • R(l);::QAB1(J)
      • B(k);P_PINP(G)::QAB1(J)
      • Q(j);::QAB1(J),XP(d)
      • S(c);::QAB1(J),XP(d)
      • S(c);::B(F)
      • S(g);::B(F)
      • P(i);::QAB1(J),XP(d)
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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).