MESON Chess Problem Database

Problem Display
PID: 10425 (1q1n1b2/1pPkp2Q/3P3B/3R2P1/N7/2Nn4/7K/2R5 w - - 0 1)

Zarur, Almiro Elias

2nd Prize, Probleemblad 114. TT, 1964

1q1n1b2/1pPkp2Q/3P3B/3R2P1/N7/2Nn4/7K/2R5

#2

10 + 7

3174 The Two-move Chess Problem Tradition and Development 1966
5862 An ABC of Chess Problems 1970
133 The Problemist Supplement 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.cxb8S#
    • 1...Ke6
      • 2.Qf5#
    • 1...Kc8
      • 2.Sb6#
    • 1...Ke8
      • 2.d7#
  • Tries
    • 1.Sb6+?
      • 1...Ke6
        • 2.Qf5#
        • 2.Qg6#
      • 1...Ke8
        • 2.d7#
      • 1...Kc6!
    • 1.Qxe7+?
      • 1...Kc6
        • 2.Qe8#
        • 2.cxb8S#
      • 1...Kc8
        • 2.Sb6#
        • 2.Qxd8#
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Bxe7!
    • 1.cxb8S+?
      • 1...Ke6
        • 2.Qf5#
        • 2.Qg6#
      • 1...Ke8
        • 2.d7#
      • 1...Kc8!
    • 1.c8Q+?
      • 1...Kxc8
        • 2.Sb6#
      • 1...Ke8
        • 2.Qg6#
      • 1...Qxc8!
  • Keys
    • 1.dxe7+!
      • 1...Kc6
        • 2.e8Q#
        • 2.e8B#
      • 1...Ke6
        • 2.exf8S#
      • 1...Kxc7
        • 2.Sb5#
      • 1...Kc8
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Ke8
        • 2.exf8Q#
        • 2.exf8R#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(c);N_SPINP(d),S_FLIGHT::PXQ(e)=S
    • K(c);N_SPINP(d),S_FLIGHT::QAB1(J)
    • K(c);N_SPINP(d),S_FLIGHT::S(D)
    • K(c);N_SPINP(d),OGATE,S_FLIGHT::P(G)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_SPINP(d),OGATE,S_FLIGHT::P(G)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
    • Try
      • Q(J);CHECK,XP(d)
      • Refutation
        • B(g);XQ(J)
    • Try
      • P(I);CHECK,XQ(e)
      • Vars
        • K(c);N_SPINP(d),OGATE,S_FLIGHT::P(G)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
    • Try
      • P(I);CHECK,P_SPINP(G)
      • Vars
        • K(c);N_SPINP(d),S_FLIGHT,XQ(I)::S(D)
        • K(c);N_SPINP(d),P_SPINS(f),S_FLIGHT::QAB(J)
      • Refutation
        • Q(e);N_PINP(G),XQ(I)
  • Actual
    • P(G);CHECK,P_SPINP(I),XP(d)
    • Vars
      • K(c);S_FLIGHT::P=Q
      • K(c);S_FLIGHT::PXB(g)=S
      • K(c);P-FLIGHT,XP(I)::R(A)+S(C),DCHECK
      • K(c);S_FLIGHT::PXS(f)=Q
      • K(c);S_FLIGHT::PXB(g)=Q
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