MESON Chess Problem Database

Problem Display
PID: 258460 (5R2/4p3/q5p1/1B3P2/2Np3N/1p1K4/3B2R1/5k2 w - - 0 1)

McDowell, Michael

1st Prize, British Chess Magazine 02. TT, 1986

5R2/4p3/q5p1/1B3P2/2Np3N/1p1K4/3B2R1/5k2

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.fxg6#
    • 1...Qa2
      • 2.fxg6#
    • 1...Qa3
      • 2.fxg6#
    • 1...Qa4
      • 2.fxg6#
    • 1...Qa5
      • 2.fxg6#
    • 1...Qe6
      • 2.fxe6#
    • 1...Qa7
      • 2.fxg6#
    • 1...gxf5
      • 2.Rxf5#
    • 1...e5
      • 2.fxe5 ep#
    • 1...e6
      • 2.fxe6#
      • 2.fxg6#
  • Tries
    • 1.Be3?
      • threat
        • 2.Rg1#
      • 1...Ke1
        • 2.Rg1#
      • 1...dxe3!
    • 1.Bxa6?
      • threat
        • 2.fxg6#
      • 1...gxf5
        • 2.Rxf5#
      • 1...g5!
  • Keys
    • 1.Kxd4!
      • threat
        • 2.Se3#
      • 1...Qa1+
        • 2.Sb2#
      • 1...Qb6+
        • 2.Sxb6#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Qf6+
        • 2.Se5#
      • 1...Qa7+
        • 2.Sb6#
      • 1...e5+
        • 2.fxe5 ep#
      • 1...Qa4
        • 2.fxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(d);N_GUARD::R(H)+P(G),XP(e)
    • Q(d);OGATE::R(H)+P(G),XQ(d)
    • P(e);OGATE,P_SPINP(e),XP(G)::R(H),XP(e)
    • P(f);OGATE::R(H)+P(G),XP(f),EP
  • Tries
    • Try
      • B(A);
      • Threat
        • R1(B)
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • P(c);XB(A)
    • Try
      • B(F);XQ(d)
      • Threat
        • R(H)+P(G),XP(e)
      • Vars
        • P(e);OGATE,P_SPINP(e),XP(G)::R(H),XP(e)
      • Refutation
        • P(e);
  • Actual
    • K(C);P-FLIGHT,XP(c)
    • Threat
      • B(F)+S(D),DCHECK
    • Vars
      • Q(d);CHECK,N_GUARD::B(F)+S(D)
      • Q(d);CHECK,N_GUARD::B(F)+S(D),XQ(d)
      • P(f);CHECK,OGATE::R(H)+P(G),XP(f),EP
      • Q(d);N_GUARD,P_PINS(D)::R(H)+P(G),XP(e)
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