MESON Chess Problem Database

Problem Display
PID: 221788 (r3R3/p1PPrn2/B1K1kp2/2P1p3/8/1NqQ4/8/6R1 w - - 0 1)

Lupton, James Money-Kyrle

The Field, 1893

(First published on Sat Oct 28 1893)

r3R3/p1PPrn2/B1K1kp2/2P1p3/8/1NqQ4/8/6R1

#2

9 + 8

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bc4#
    • 1...Qe1
      • 2.Bc4#
    • 1...Qb2
      • 2.Bc4#
    • 1...Qd2
      • 2.Bc4#
    • 1...Qa5
      • 2.Bc4#
    • 1...Qc4
      • 2.Bxc4#
    • 1...Qxc5+
      • 2.Sxc5#
    • 1...Rc8
      • 2.dxc8Q#
      • 2.dxc8B#
    • 1...e4
      • 2.Qd5#
    • 1...f5
      • 2.Rg6#
  • Tries
    • 1.Qc4+?
      • 1...Kf5
        • 2.Qg4#
      • 1...Qxc4!
    • 1.Qh3+?
      • 1...f5
        • 2.Rg6#
      • 1...Qxh3!
    • 1.c8Q?
      • threat
        • 2.d8S#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Rxc8+
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Rxe8
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...e4
        • 2.Qd5#
      • 1...f5
        • 2.Rg6#
      • 1...Sd8+!
    • 1.c8B?
      • threat
        • 2.d8S#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Rxc8+
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Rxe8
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...e4
        • 2.Qd5#
      • 1...f5
        • 2.Rg6#
      • 1...Sd8+!
  • Keys
    • 1.Bc8!
      • threat
        • 2.d8S#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Sd8+
        • 2.cxd8S#
      • 1...Rxe8
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Rxc8
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...e4
        • 2.Qd5#
      • 1...f5
        • 2.Rg6#

There are these versions: 221789

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD,N_PINP(D)::B(E)
    • Q(a);N_GUARD::B(E),XQ(a)
    • Q(a);CHECK,XP(D)::S(B),XQ(a)
    • R(h);OGATE::PXR(h)=Q
    • P(b);::QAB1(C)
    • P(d);OGATEB::R(A)
  • Tries
    • Try
      • Q(C);CHECK,N_SPINP(D)
      • Vars
        • K(c);N_SPINR(f),S_FLIGHT::QAB1(C)
      • Refutation
        • Q(a);P_PINP(D),XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • P(d);P_SPINP(d),S_CUTQ(a)::R(A)
      • Refutation
        • Q(a);N_PINP(D),XQ(C)
    • Try
      • P(G);
      • Threat
        • P=S
      • Vars
        • Q(a);CHECK,XP(D)::S(B),XQ(a)
        • R(h);CHECK,OGATE,XQ(G)::PXR(h)=Q
        • R(f);N_SPINR(f),OGATE,XR(I)::PXR(f)=Q
        • P(b);::QAB1(C)
        • P(d);OGATEB::R(A)
      • Refutation
        • S(g);CHECK
    • Try
      • P(G);
      • Threat
        • P=S
      • Vars
        • Q(a);CHECK,XP(D)::S(B),XQ(a)
        • R(h);CHECK,OGATE,XB(G)::PXR(h)=Q
        • R(f);N_SPINR(f),OGATE,XR(I)::PXR(f)=Q
        • P(b);::QAB1(C)
        • P(d);OGATEB::R(A)
      • Refutation
        • S(g);CHECK
  • Actual
    • B(E);
    • Threat
      • P=S
    • Vars
      • Q(a);CHECK,XP(D)::S(B),XQ(a)
      • S(g);CHECK,OGATE::PXS(g)=S
      • R(f);N_SPINR(f),OGATE,XR(I)::PXR(f)=Q
      • R(h);OGATE,XB(E)::PXR(h)=Q
      • P(b);::QAB1(C)
      • P(d);OGATEB::R(A)
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