MESON Chess Problem Database

Problem Display
PID: 143580 (1R2B2K/n1b5/4p3/p2k3n/PpNPNp2/PP3Pp1/8/3R2Q1 w - - 0 1)

Gittins, Frederick Richard

British Chess Magazine, 1895

1R2B2K/n1b5/4p3/p2k3n/PpNPNp2/PP3Pp1/8/3R2Q1

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be5+
      • 2.dxe5#
    • 1...Bb6
      • 2.Sxb6#
    • 1...Bd6
      • 2.Sb6#
    • 1...Bxb8
      • 2.Sb6#
    • 1...Bd8
      • 2.Rxd8#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sg7
      • 2.Sf6#
    • 1...Sb5
      • 2.Rxb5#
    • 1...Sc6
      • 2.Rb5#
    • 1...Sc8
      • 2.Rb5#
    • 1...bxa3
      • 2.Sc3#
  • Tries
    • 1.Bc6+?
      • 1...Sxc6
        • 2.Rb5#
      • 1...Kxc6!
    • 1.Rd8+?
      • 1...Bd6
        • 2.Sb6#
        • 2.Rxd6#
      • 1...Bxd8!
    • 1.Qg2?
      • 1...Be5+
        • 2.dxe5#
      • 1...Bxb8
        • 2.Sb6#
      • 1...bxa3
        • 2.Sc3#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bd6
        • 2.Sb6#
      • 1...Bd8
        • 2.Rxd8#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sg7
        • 2.Sf6#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Sc6
        • 2.Rb5#
      • 1...Sc8
        • 2.Rb5#
      • 1...e5!
  • Keys
    • 1.Qxg3!
      • 1...Be5+
        • 2.dxe5#
      • 1...Bxb8
        • 2.Sb6#
      • 1...Sxg3
        • 2.Sf6#
      • 1...bxa3
        • 2.Sc3#
      • 1...fxg3
        • 2.Se3#
      • 1...e5
        • 2.Qg8#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bd6
        • 2.Sb6#
      • 1...Bd8
        • 2.Rxd8#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sg7
        • 2.Sf6#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Sc6
        • 2.Rb5#
      • 1...Sc8
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(i);CHECK,OGATE::R(A)+P(H),XB(i)
    • B(i);N_GUARD::S(G),XB(i)
    • B(i);N_GUARD::S(G)
    • B(i);N_GUARD,XR(J)::S(G)
    • B(i);N_GUARD::R(J),XB(i)
    • S(f);N_GUARD::S(I),XS(f)
    • S(f);N_GUARD::S(I)
    • S(h);N_GUARD::R(J),XS(h)
    • S(h);N_GUARD::R(J)
    • P(b);N_GUARD,XP(C)::S(I)
  • Tries
    • Try
      • B(K);CHECK
      • Vars
        • S(h);SBLOCK,XB(K)::R(J)
      • Refutation
        • K(e);S_FLIGHT,XB(K)
    • Try
      • R(J);CHECK
      • Refutation
        • B(i);XR(J)
    • Try
      • Q(B);
      • Vars
        • B(i);CHECK,OGATE::R(A)+P(H),XB(i)
        • B(i);N_GUARD,XR(J)::S(G)
        • P(b);N_GUARD,XP(C)::S(I)
        • B(i);N_GUARD::S(G),XB(i)
        • B(i);N_GUARD::S(G)
        • B(i);N_GUARD::R(J),XB(i)
        • S(f);N_GUARD::S(I),XS(f)
        • S(f);N_GUARD::S(I)
        • S(h);N_GUARD::R(J),XS(h)
        • S(h);N_GUARD::R(J)
      • Refutation
        • P(g);
  • Actual
    • Q(B);XP(a)
    • Vars
      • B(i);CHECK,OGATE::R(A)+P(H),XB(i)
      • B(i);N_GUARD,XR(J)::S(G)
      • S(f);N_GUARD,XQ(B)::S(I)
      • P(b);N_GUARD,XP(C)::S(I)
      • P(c);N_GUARD,XQ(B)::S(G)
      • P(g);OGATEB::QAB(B)
      • B(i);N_GUARD::S(G),XB(i)
      • B(i);N_GUARD::S(G)
      • B(i);N_GUARD::R(J),XB(i)
      • S(f);N_GUARD::S(I),XS(f)
      • S(f);N_GUARD::S(I)
      • S(h);N_GUARD::R(J),XS(h)
      • S(h);N_GUARD::R(J)
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