MESON Chess Problem Database

Problem Display
PID: 66025 (5Q2/3pBp2/1P3P1N/Pp1k2P1/1P6/3NP3/3P4/2K2B2 w - - 0 1)

Mochalkin, Oleksandr Viktorovich

Shedey, Sergey Oleksandrovich

Bulletin of the Central Chess Club of USSR, 1979

5Q2/3pBp2/1P3P1N/Pp1k2P1/1P6/3NP3/3P4/2K2B2

#2

13 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qa8#
    • 1...Ke6
      • 2.Qxf7#
  • Tries
    • 1.Kc2?
      • 1...Kc4
        • 2.Sf4#
      • 1...Ke4
        • 2.Bg2#
      • 1...Kc6
        • 2.Qa8#
      • 1...Ke6
        • 2.Qxf7#
      • 1...d6!
    • 1.Bg2+?
      • 1...Ke6
        • 2.Qxf7#
      • 1...Kc4!
    • 1.Qa8+?
      • 1...Ke6
        • 2.Bh3#
        • 2.Qe4#
      • 1...Kc4!
  • Keys
    • 1.Bd6!
      • 1...Kc4
        • 2.Qxf7#
      • 1...Ke4
        • 2.Qa8#
      • 1...Kc6
        • 2.Bg2#
      • 1...Ke6
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(M)
    • K(b);S_FLIGHT::QAB1(M),XP(d)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(B)+S(D)
        • K(b);S_FLIGHT::B(B)
        • K(b);S_FLIGHT::QAB(M)
        • K(b);S_FLIGHT::QAB1(M),XP(d)
      • Refutation
        • P(c);
    • Try
      • B(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(M),XP(d)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(M);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(L);
    • Vars
      • K(b);S_FLIGHT::QAB(M),XP(d)
      • K(b);S_FLIGHT::QAB(M)
      • K(b);S_FLIGHT::B(B)
      • K(b);S_FLIGHT::S(D)
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