MESON Chess Problem Database

Problem Display
PID: 147235 (8/3p4/8/Kbk5/4Q3/5NB1/8/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

Melnichenko, Viktor Oleksandrovich

Canadian Chess Chat, 1983

8/3p4/8/Kbk5/4Q3/5NB1/8/8

#2

4 + 3

5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Qd4#
    • 1...d6
      • 2.Bf2#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sb3#
      • 1...Ba4
        • 2.Qc4#
      • 1...Bc4
        • 2.Qxc4#
      • 1...d5!
    • 1.Qb4+?
      • 1...Kc6
        • 2.Qxb5#
      • 1...Kd5!
  • Keys
    • 1.Se5!
      • 1...Kd6
        • 2.Sd3#
      • 1...Bf1
        • 2.Sxd7#
      • 1...Be2
        • 2.Sxd7#
      • 1...Bd3
        • 2.Sxd3#
        • 2.Sxd7#
      • 1...Ba4
        • 2.Sd3#
      • 1...Bc4
        • 2.Sxd7#
      • 1...Ba6
        • 2.Sxd7#
      • 1...Bc6
        • 2.Sd3#
      • 1...d5
        • 2.Qb4#
      • 1...d6
        • 2.Bf2#

Anticipated by 11632(1970)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::QAB1(C)
    • P(c);SBLOCK::B(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • B(a);N_GUARD::QAR1(C)
        • B(a);N_GUARD::QAR1(C),XB(a)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(C),XB(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(b);S_FLIGHT::B(B)+S(A)
      • B(a);N_GUARD::S(A),XP(c)
      • B(a);N_GUARD::S(A)
      • P(c);SBLOCK::QAB1(C)
      • P(c);SBLOCK::B(B)
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