MESON Chess Problem Database

Problem Display
PID: 261440 (k7/8/1Q1PpP2/1p2q1N1/4p1R1/5B2/4K3/8 w - - 0 1)

Lipton, Michael

The Problemist, 2004

k7/8/1Q1PpP2/1p2q1N1/4p1R1/5B2/4K3/8

#2

7 + 5

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxe4#
    • 1...Qg3
      • 2.Bxe4#
    • 1...Qxf6
      • 2.Bxe4#
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Rg8#
      • 1...Qb2+
        • 2.Sd2#
      • 1...Qh2+
        • 2.Sf2#
      • 1...Qxe4+
        • 2.Bxe4#
      • 1...Qxd6
        • 2.Sxd6#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Qc3
        • 2.Sxc3#
      • 1...Qg3
        • 2.Sxg3#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qg5
        • 2.Sxg5#
      • 1...Qh5
        • 2.Sg5#

This is after

After A Bottacchi.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::B(B),XP(a)
    • Q(c);N_GUARD,XP(G)::B(B),XP(a)
  • Actual
    • S(D);P_SPINS(D),XP(a)
    • Threat
      • R(C)
    • Vars
      • Q(c);CHECK,N_PINS(D)::B(B)+S(D)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(D)::B(B),XQ(c)
      • Q(c);N_PINS(D),XP(F)::B(B)+S(D),XQ(c)
      • Q(c);N_PINS(D),XP(G)::B(B)+S(D),XQ(c)
      • Q(c);N_PINS(D)::B(B)+S(D),XQ(c)
      • Q(c);N_PINS(D)::B(B)+S(D)
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