MESON Chess Problem Database

Problem Display
PID: 86483 (K3R3/8/3B4/R2B4/1n1kN1p1/7q/1p1p2n1/5Q2 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Lvovski Konkurz, 1958

K3R3/8/3B4/R2B4/1n1kN1p1/7q/1p1p2n1/5Q2

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Bc5#
    • 1...Qe3
      • 2.Be5#
      • 2.Qc4#
    • 1...Se3
      • 2.Be5#
    • 1...Sxd5
      • 2.Bc5#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Qc4#
      • 1...Kc3
        • 2.Qc4#
      • 1...Se3
        • 2.Be5#
      • 1...Sd3
        • 2.Se2#
      • 1...Sxd5!
    • 1.Qf6+?
      • 1...Ke3
        • 2.Sf2#
        • 2.Sc5#
      • 1...Kd3!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qc4#
      • 1...Kxc3
        • 2.Qc4#
      • 1...Qxc3
        • 2.Re4#
      • 1...Sxd5
        • 2.Sb5#
      • 1...Qd3
        • 2.Qf6#
      • 1...Se3
        • 2.Be5#
      • 1...Sd3
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(f);S_FLIGHT::B(E)
    • S(c);SBLOCK::B(E)
    • S(e);SBLOCK,XB(D)::B(E)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(f);S_FLIGHT::QAR1(A)
        • S(c);SBLOCK::B(E)
        • S(e);SBLOCK::S(B)
      • Refutation
        • S(e);XB(D)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • K(f);S_FLIGHT,XS(B)::QAR1(A)
      • Q(d);SBLOCK,XS(B)::R1(G)
      • S(e);SBLOCK,XB(D)::S(B)
      • Q(d);SBLOCK::QAB(A)
      • S(c);SBLOCK::B(E)
      • S(e);SBLOCK::S(B)
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