MESON Chess Problem Database

Problem Display
PID: 55660 (r5b1/R4Nnp/1P1B1p2/RK3k2/8/1PP4n/Q3P1N1/r6q w - - 0 1)

Zarur, Almiro Elias

1st Prize, BCF, 1962

r5b1/R4Nnp/1P1B1p2/RK3k2/8/1PP4n/Q3P1N1/r6q

#2

11 + 9

3747 FIDE Album (1962-1964) 1968
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Ka4+?
      • 1...Kg4
        • 2.Sh6#
      • 1...Ke6
        • 2.Re7#
      • 1...Kg6
        • 2.Sh4#
      • 1...Ke4!
    • 1.Kc4+?
      • 1...Ke4
        • 2.Qc2#
      • 1...Ke6
        • 2.Re7#
      • 1...Kg6
        • 2.Sh4#
      • 1...Kg4!
    • 1.Ka6+?
      • 1...Ke4
        • 2.Qc2#
      • 1...Kg4
        • 2.Sh6#
      • 1...Kg6
        • 2.Sh4#
      • 1...Ke6!
    • 1.Kc6+?
      • 1...Ke4
        • 2.Qc2#
      • 1...Kg4
        • 2.Sh6#
      • 1...Ke6
        • 2.Re7#
      • 1...Kg6!
    • 1.Qc2+?
      • 1...Ke6
        • 2.Qe4#
      • 1...Kg4!
  • Keys
    • 1.Kb4+!
      • 1...Ke4
        • 2.Qc2#
      • 1...Kg4
        • 2.Sh6#
      • 1...Ke6
        • 2.Re7#
      • 1...Kg6
        • 2.Sh4#

This anticipates 170500(1975)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(G);CHECK,P_SPINQ(A),S_FLIGHT
      • Vars
        • K(d);S_FLIGHT::S(K)
        • K(d);S_FLIGHT::R1(J)
        • K(d);S_FLIGHT::S(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • K(G);CHECK,P_SPINS(K),S_FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAB(A)
        • K(d);N_PINS(K),S_FLIGHT::R1(J)
        • K(d);S_FLIGHT::S(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • K(G);CHECK,P_SPINR(J),S_FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAB(A)
        • K(d);S_FLIGHT::S(K)
        • K(d);S_FLIGHT::S(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • K(G);CHECK,P_SPINS(C),S_FLIGHT
      • Vars
        • K(d);N_PINS(C),S_FLIGHT::QAB(A)
        • K(d);S_FLIGHT::S(K)
        • K(d);S_FLIGHT::R1(J)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR2(A)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • K(G);CHECK,P-FLIGHT
    • Vars
      • K(d);S_FLIGHT::QAB(A)
      • K(d);S_FLIGHT::S(K)
      • K(d);S_FLIGHT::R1(J)
      • K(d);S_FLIGHT::S(C)
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