MESON Chess Problem Database

Problem Display
PID: 143672 (1b4nN/4B3/8/1K1p4/4pk2/6RB/7p/Q7 w - - 0 1)

Knight, JT

British Chess Magazine, 1896

1b4nN/4B3/8/1K1p4/4pk2/6RB/7p/Q7

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Bxd6#
    • 1...Ba7
      • 2.Bd6#
  • Tries
    • 1.Bh4?
      • threat
        • 2.Sg6#
      • 1...e3
        • 2.Qd4#
      • 1...Se7!
    • 1.Qc3?
      • threat
        • 2.Sg6#
        • 2.Bg5#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Sg6#
      • 1...Sf6
        • 2.Sg6#
      • 1...Sxe7!
    • 1.Qc1+?
      • 1...Kxg3
        • 2.Qe3#
      • 1...e3
        • 2.Qxe3#
      • 1...Ke5!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qxb8#
      • 1...Kxg3
        • 2.Qe3#
      • 1...Ke5
        • 2.Sg6#
      • 1...Bxa7
        • 2.Bd6#
      • 1...e3
        • 2.Qxe3#
      • 1...Be5
        • 2.Qf2#
        • 2.Qe3#
      • 1...Bd6
        • 2.Bxd6#
      • 1...Bc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(e);N_GUARD::B(E),XB(e)
    • B(e);N_GUARD::B(E)
  • Tries
    • Try
      • B(E);
      • Threat
        • S(F)
      • Vars
        • P(b);OGATEB::QAR2(A)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(A),XP(b)
        • P(d);::S(F)
        • S(f);::S(F)
      • Refutation
        • S(f);XB(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(B)::QAR2(A)
        • P(b);P_SPINP(b)::QAB1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XB(e)
    • Vars
      • K(c);S_FLIGHT,XR(B)::QAR2(A)
      • K(c);S_FLIGHT::S(F)
      • B(e);N_GUARD,XQ(A)::B(E)
      • P(b);::QAB1(A),XP(b)
      • B(e);N_GUARD::B(E),XB(e)
      • B(e);N_GUARD::QAB(A),XB(e)
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