MESON Chess Problem Database

Problem Display
PID: 197918 (4B3/2prN1P1/1n1kbP1K/1P4N1/2p5/4Q3/2p1n3/8 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Stella Polaris, 1966

4B3/2prN1P1/1n1kbP1K/1P4N1/2p5/4Q3/2p1n3/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Sf7#
    • 1...Bg4
      • 2.Sf7#
    • 1...Bd5
      • 2.Sf5#
    • 1...Bf5
      • 2.Sf7#
    • 1...Bf7
      • 2.Sxf7#
    • 1...Sd5
      • 2.Sc8#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...Sd5
        • 2.Se4#
      • 1...Bd5!
    • 1.Qd4+?
      • 1...Bd5
        • 2.Sf5#
      • 1...Sd5
        • 2.Se4#
        • 2.Sc8#
      • 1...Sxd4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...Bd5
        • 2.Qa3#
      • 1...Sd5
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(f);N_GUARD::S(C)
    • B(f);N_GUARD,SBLOCK::S(F)
    • B(f);N_GUARD::S(C),XB(f)
    • S(d);N_GUARD,SBLOCK::S(F)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB1(A)
      • Vars
        • K(e);P-FLIGHT::QAR1(A)
        • S(d);SBLOCK::S(C)
      • Refutation
        • B(f);
    • Try
      • Q(A);CHECK
      • Vars
        • B(f);P_SPINB(f)::S(F)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • S(F);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);P-FLIGHT::QAR1(A)
      • B(f);SBLOCK::QAB(A)
      • S(d);SBLOCK::S(C)
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