MESON Chess Problem Database

Problem Display
PID: 10527 (3B2b1/4R3/1p3q1P/r2pp3/PR2n2k/1n3BpN/1K4P1/8 w - - 0 1)

Lipton, Michael

1st Comm., Probleemblad, 1965

3B2b1/4R3/1p3q1P/r2pp3/PR2n2k/1n3BpN/1K4P1/8

#2

9 + 10

5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe7
      • 2.Bxe7#
    • 1...Qg7
      • 2.Rxg7#
    • 1...Qh8
      • 2.Rg7#
    • 1...Qc6
      • 2.Re6#
    • 1...Qe6
      • 2.Rxe6#
    • 1...Qxh6
      • 2.Rh7#
    • 1...Qf7
      • 2.Rxf7#
  • Tries
    • 1.Rxe4+?
      • 1...Qf4
        • 2.R7xe5#
        • 2.Re6#
        • 2.Ra7#
        • 2.Rb7#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Rf7#
        • 2.Rg7#
        • 2.Rh7#
        • 2.Re8#
      • 1...dxe4!
  • Keys
    • 1.Rxe5!
      • threat
        • 2.Bxf6#
      • 1...Qxd8
        • 2.Rh5#
      • 1...Qg5
        • 2.Bxg5#
      • 1...Qe7
        • 2.Bxe7#
        • 2.Rh5#
      • 1...Sd4
        • 2.Rh5#
      • 1...d4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(i);OGATE,P_SPINQ(i),XR(H)::B(I),XQ(i)
    • Q(i);OGATEB::B(I)+R(H),XQ(i)
    • Q(i);OGATEB::B(I)+R(H)
    • Q(i);OGATEB,XP(G)::B(I)+R(H)
  • Tries
    • Try
      • R(F);CHECK,XS(c)
      • Refutation
        • P(f);XR(F)
  • Actual
    • R(H);P_PINQ(i),P_SPINR(H),XP(g)
    • Threat
      • B(I),XQ(i)
    • Vars
      • Q(i);N_PINR(H),N_SPINQ(i),XB(I)::R1(H)
      • Q(i);N_PINR(H),OGATE::B(I),XQ(i)
      • S(a);N_PINR(H),N_SPINS(c)::R1(H)
      • P(f);N_PINR(H),N_SPINS(c)::R(H),XS(c)
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