MESON Chess Problem Database

Problem Display
PID: 794 (5NqB/6P1/3p1k2/3B1N2/2P2K2/8/8/8 w - - 0 1)

Morse, Christopher Jeremy

British Chess Magazine, 1962

5NqB/6P1/3p1k2/3B1N2/2P2K2/8/8/8

#2

7 + 3

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.g8Q#
      • 2.g8B#
    • 1...Qe6
      • 2.g8Q#
      • 2.g8B#
    • 1...Qf7
      • 2.g8S#
    • 1...Qh7
      • 2.g8S#
    • 1...Qxg7
      • 2.Bxg7#
    • 1...Qxf8
      • 2.gxf8S#
    • 1...Qxh8
      • 2.gxh8Q#
      • 2.gxh8B#
  • Tries
    • 1.Be6?
      • 1...Qxe6
        • 2.g8Q#
        • 2.g8B#
      • 1...Qxg7
        • 2.Bxg7#
      • 1...Qxf8
        • 2.gxf8S#
      • 1...Qxh8
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Qf7
        • 2.g8S#
      • 1...Qh7
        • 2.g8S#
      • 1...d5!
    • 1.c5?
      • 1...Qxd5
        • 2.g8Q#
        • 2.g8B#
      • 1...Qxg7
        • 2.Bxg7#
      • 1...Qxf8
        • 2.gxf8S#
      • 1...Qxh8
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Qe6
        • 2.g8Q#
        • 2.g8B#
      • 1...Qf7
        • 2.g8S#
      • 1...Qh7
        • 2.g8S#
      • 1...dxc5!
  • Keys
    • 1.Kg4!
      • 1...Qxg7+
        • 2.Bxg7#
      • 1...Ke5
        • 2.Sd7#
      • 1...Qxd5
        • 2.g8Q#
        • 2.g8B#
      • 1...Qxf8
        • 2.gxf8S#
      • 1...Qxh8
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Qe6
        • 2.g8Q#
        • 2.g8B#
      • 1...Qf7
        • 2.g8S#
      • 1...Qh7
        • 2.g8S#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATE,XB(C)::P=Q
    • Q(c);OGATE::P=Q
    • Q(c);OGATE::P=S
    • Q(c);OGATE,P_SPINQ(c),XP(E)::B(G),XQ(c)
    • Q(c);OGATE,XS(F)::PXQ(c)=S
    • Q(c);OGATE,XB(G)::PXQ(c)=Q
  • Tries
    • Try
      • B(C);
      • Vars
        • Q(c);OGATE,XB(C)::P=Q
        • Q(c);OGATE,P_SPINQ(c),XP(E)::B(G),XQ(c)
        • Q(c);OGATE,XS(F)::PXQ(c)=S
        • Q(c);OGATE,XB(G)::PXQ(c)=Q
        • Q(c);OGATE::P=S
      • Refutation
        • P(a);
    • Try
      • P(A);
      • Vars
        • Q(c);OGATE,XB(C)::P=Q
        • Q(c);OGATE,P_SPINQ(c),XP(E)::B(G),XQ(c)
        • Q(c);OGATE,XS(F)::PXQ(c)=S
        • Q(c);OGATE,XB(G)::PXQ(c)=Q
        • Q(c);OGATE::P=Q
        • Q(c);OGATE::P=S
      • Refutation
        • P(a);XP(A)
  • Actual
    • K(B);P-FLIGHT,P_SPINP(E)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XP(E)::B(G),XQ(c)
      • K(b);S_FLIGHT::S(F)
      • Q(c);N_PINP(E),XB(C)::P=Q
      • Q(c);N_PINP(E),XS(F)::PXQ(c)=S
      • Q(c);N_PINP(E),XB(G)::PXQ(c)=Q
      • Q(c);N_PINP(E),P_PINS(D)::P=Q
      • Q(c);N_PINP(E)::P=S
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