MESON Chess Problem Database

Problem Display
PID: 52675 (8/3K4/2B5/1R1p4/1N1q2p1/2PpP3/3R3B/7k w - - 0 1)

Lipton, Michael

The Problemist, 2004

8/3K4/2B5/1R1p4/1N1q2p1/2PpP3/3R3B/7k

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3
      • 2.Bxd5#
    • 1...Qb6
      • 2.Bxd5#
    • 1...Qh8
      • 2.Bxd5#
  • Tries
    • 1.Bxd5+?
      • 1...Qe4
        • 2.Bxe4#
      • 1...Qxd5+!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Rb1#
      • 1...Qa7+
        • 2.Sc7#
      • 1...Qg7+
        • 2.Se7#
      • 1...Qxd5+
        • 2.Bxd5#
      • 1...Qxc3
        • 2.Sxc3#
      • 1...Qxe3
        • 2.Sxe3#
      • 1...Qb6
        • 2.Sxb6#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Qa4
        • 2.Sb4#
      • 1...Qb4
        • 2.Sxb4#
      • 1...Qf4
        • 2.Sxf4#

This is after

After A. Bottacchi.

FEATURES

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