MESON Chess Problem Database

Problem Display
PID: 15340 (q7/8/pb2N3/N4b1Q/k3PRr1/6p1/1PPBB3/2K5 w - - 0 1)

McDowell, Michael

Schiffs with Everything, 1983

q7/8/pb2N3/N4b1Q/k3PRr1/6p1/1PPBB3/2K5

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qe8#
    • 1...Qe8
      • 2.Qxe8#
    • 1...Bxa5
      • 2.Sc5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bc7
      • 2.Sc5#
    • 1...Bd8
      • 2.Sc5#
  • Tries
    • 1.Qe8+?
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qxe8!
    • 1.exf5+?
      • 1...Qe4
        • 2.Qe8#
      • 1...Bd4
        • 2.Sc5#
      • 1...Rxf4!
  • Keys
    • 1.Bd1!
      • threat
        • 2.c4#
      • 1...Kb5
        • 2.c4#
      • 1...Qxe4
        • 2.Qe8#
      • 1...Bxe4
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_GUARD,P_SPINQ(g),XP(F)::QAB(I)
    • Q(g);N_GUARD::QAB(I),XQ(g)
    • B(f);N_GUARD,XS(H)::S(J)
    • B(f);N_GUARD::S(J),XB(f)
    • B(f);N_GUARD::S(J)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • Q(g);N_GUARD,P_PINP(C),P_SPINQ(g)::QAB(I),XQ(g)
      • Refutation
        • Q(g);XQ(I)
    • Try
      • P(F);CHECK,XB(d)
      • Vars
        • Q(g);P_SPINQ(g)::QAB(I)
        • B(f);P_SPINB(f)::S(J)
      • Refutation
        • R(c);XR(G)
  • Actual
    • B(E);
    • Threat
      • B(E)+P(C)
    • Vars
      • K(b);P_SPINB(d),S_FLIGHT::P(C)
      • Q(g);N_GUARD,P_SPINQ(g),XP(F)::QAB(I)
      • B(d);P_SPINB(d),XP(F)::B(E)+P(C)
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