MESON Chess Problem Database

Problem Display
PID: 15720 (8/1K6/8/p3p3/k3N3/2Q5/8/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

Lokker MT, 1987

8/1K6/8/p3p3/k3N3/2Q5/8/8

#2

3 + 3

3296 Shakhmatny zadachi miniaturi 1987
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qb3#
  • Tries
    • 1.Qa3+?
      • 1...Kb5
        • 2.Sd6#
        • 2.Qb3#
      • 1...Kxa3!
    • 1.Qe3?
      • 1...Kb5
        • 2.Qb3#
      • 1...Kb4!
    • 1.Qf3?
      • 1...Kb5
        • 2.Qb3#
      • 1...Kb4!
    • 1.Qg3?
      • 1...Kb5
        • 2.Qb3#
      • 1...Kb4!
    • 1.Qh3?
      • 1...Kb5
        • 2.Qb3#
      • 1...Kb4!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qb3#
      • 1...Kb5
        • 2.Qc4#

Anticipated by 12423(1979)

This anticipates 56643(1997-1998)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
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