MESON Chess Problem Database

Problem Display
PID: 12216 (8/3Q4/8/1N6/1k6/4K3/2R5/8 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1976

8/3Q4/8/1N6/1k6/4K3/2R5/8

#2

4 + 1

5454 Near Snap 1976

SOLUTION

  • SOUND
  • Tries
    • 1.Sd4?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
    • 1.Rb2+?
      • 1...Ka4
        • 2.Qa7#
      • 1...Kc4
        • 2.Qc6#
        • 2.Qd4#
      • 1...Ka5
        • 2.Qa7#
      • 1...Kc5!
  • Keys
    • 1.Sc3!
      • 1...Ka3
        • 2.Qa4#
      • 1...Kb3
        • 2.Qa4#
      • 1...Kc4
        • 2.Qb5#
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc5
        • 2.Sd5#

Anticipated by 6621(1932), 41413(1935), 197826(1944)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(D)
        • K(a);S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);P-FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::R(A)+S(C)
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