MESON Chess Problem Database

Problem Display
PID: 53683 (1B1KN2Q/3b4/3R4/PPk2n2/7p/P7/3N2pq/1r6 w - - 0 1)

Zagoruyko, Leonid Ivanovich

3rd Prize, Chigorin MT, 1949-1950

1B1KN2Q/3b4/3R4/PPk2n2/7p/P7/3N2pq/1r6

#2

9 + 7

45 Schach 1950
113 Shakhmaty v SSSR 1950
264 Magyar Sakkelet 1951

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qh1
      • 2.Qe5#
    • 1...Qh3
      • 2.Qe5#
    • 1...Rxb5
      • 2.Qc3#
    • 1...Bxb5
      • 2.Ba7#
    • 1...Sg3
      • 2.Qe5#
  • Keys
    • 1.Sc7!
      • threat
        • 2.Rd5#
      • 1...Kxd6
        • 2.Se4#
      • 1...Qxd6
        • 2.Qc3#
      • 1...Rxb5
        • 2.Sa6#
      • 1...Bxb5
        • 2.Se6#
      • 1...Sxd6
        • 2.Ba7#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Bc6
        • 2.Rxc6#
      • 1...Be6
        • 2.Rc6#
      • 1...Se3
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::QAR2(I)
    • Q(c);N_GUARD::QAR2(I),XQ(c)
    • R(a);SBLOCK,XP(D)::QAR2(I)
    • B(g);SBLOCK,XP(D)::B(F)
    • S(f);S_CUTQ(c)::QAR2(I)
  • Actual
    • S(H);
    • Threat
      • R1(E)
    • Vars
      • K(e);S_FLIGHT,XR(E)::S(A)
      • Q(c);SBLOCK,XR(E)::QAR2(I)
      • R(a);SBLOCK,XP(D)::S(H)
      • B(g);N_GUARD,SBLOCK,XP(D)::S(H)
      • S(f);SBLOCK,XR(E)::B(F)
      • Q(c);N_GUARD::QAR2(I),XQ(c)
      • B(g);N_GUARD::R1(E),XB(g)
      • B(g);N_GUARD::R1(E)
      • S(f);N_GUARD::QAB1(I)
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