MESON Chess Problem Database

Problem Display
PID: 18064 (KB2B3/4R3/p7/3k4/1Q1N2n1/8/8/2r1nr1b w - - 0 1)

Zagoruyko, Leonid Ivanovich

1st Prize, CSTV, 1953

KB2B3/4R3/p7/3k4/1Q1N2n1/8/8/2r1nr1b

#2

6 + 7

1997 Ajedrez 1954
3105 FIDE Album (1945-1955) 1964
2988 Izbrannie Kompozitsi 1985
3713 Snap 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bc6#
    • 1...Rb1
      • 2.Bc6#
    • 1...Rd1
      • 2.Bc6#
    • 1...Rc4
      • 2.Qd6#
    • 1...Rc6
      • 2.Bxc6#
    • 1...Rg1
      • 2.Bf7#
    • 1...Rf7
      • 2.Bxf7#
    • 1...Bf3
      • 2.Bf7#
    • 1...Be4
      • 2.Rd7#
    • 1...Sc2
      • 2.Bc6#
    • 1...Sf3
      • 2.Bf7#
    • 1...Sf2
      • 2.Bf7#
      • 2.Re5#
    • 1...Sh2
      • 2.Re5#
    • 1...Se3
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sf6
      • 2.Bf7#
      • 2.Re5#
    • 1...Sh6
      • 2.Re5#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Qd4#
      • 1...Rd1
        • 2.Qc5#
      • 1...Rc4
        • 2.Qd6#
      • 1...Sc2
        • 2.Qc5#
      • 1...Sf3
        • 2.Qe4#
      • 1...Rf4!
    • 1.Se6?
      • threat
        • 2.Qd4#
      • 1...Rd1
        • 2.Sc7#
      • 1...Rf4
        • 2.Sxf4#
      • 1...Sc2
        • 2.Sc7#
      • 1...Sf3
        • 2.Sf4#
      • 1...Rc4!
  • Keys
    • 1.Se2!
      • threat
        • 2.Qd4#
      • 1...Rd1
        • 2.Sc3#
      • 1...Rc4
        • 2.Qd6#
      • 1...Rf4
        • 2.Sxf4#
      • 1...Sc2
        • 2.Sc3#
      • 1...Sf3
        • 2.Sf4#

This anticipates 284068(1957)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(a);N_GUARD::B(F)
    • R(a);SBLOCK::QAR1(A)
    • R(a);N_GUARD::B(F),XR(a)
    • R(c);N_GUARD::B(F)
    • R(c);N_GUARD::B(F),XR(c)
    • B(d);S_CUTR(c)::B(F)
    • B(d);SBLOCK::R(C)
    • S(b);S_CUTR(a)::B(F)
    • S(b);S_CUTR(c)::B(F)
    • S(e);N_GUARD::R1(C)
    • S(e);N_GUARD::R1(C),XS(e)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD::QAR1(A)
        • R(a);SBLOCK::QAR1(A)
        • S(b);S_CUTR(a)::QAR1(A)
        • S(b);S_CUTB(d)::QAB1(A)
      • Refutation
        • R(c);
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD::S(B)
        • R(c);N_GUARD::S(B),XR(c)
        • S(b);S_CUTR(a)::S(B)
        • S(b);S_CUTR(c)::S(B)
      • Refutation
        • R(a);
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • R(a);N_GUARD::S(B)
      • R(a);SBLOCK::QAR1(A)
      • R(c);N_GUARD::S(B),XR(c)
      • S(b);S_CUTR(a)::S(B)
      • S(b);S_CUTR(c)::S(B)
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