MESON Chess Problem Database

Problem Display
PID: 18308 (6K1/4B3/7k/1p3P2/3p2P1/2p3p1/2Q1n1P1/2b5 w - - 0 1)

Ruff, Ian

Time & Tide, 1954

6K1/4B3/7k/1p3P2/3p2P1/2p3p1/2Q1n1P1/2b5

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Bf8#
    • 1...Sg1
      • 2.Qxc1#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qe6#
      • 1...Bg5
        • 2.Bf8#
      • 1...Sf4!
    • 1.Qe4?
      • threat
        • 2.Qc6#
        • 2.Qe6#
      • 1...Ba3
        • 2.Qe6#
      • 1...Bf4
        • 2.Qe6#
      • 1...Bg5
        • 2.Bf8#
      • 1...Sf4!
    • 1.Qxc1+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sxc1!
    • 1.Qa2?
      • threat
        • 2.Qe6#
        • 2.Qa6#
      • 1...Ba3
        • 2.Qe6#
      • 1...Bf4
        • 2.Qe6#
      • 1...Bg5
        • 2.Bf8#
      • 1...Sf4!
    • 1.Qxe2?
      • threat
        • 2.Qe6#
      • 1...Bg5
        • 2.Bf8#
      • 1...Be3!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qh1#
      • 1...Bg5
        • 2.Bf8#
      • 1...Sg1
        • 2.Qxc1#
      • 1...Sf4
        • 2.g5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(E)
    • S(b);N_GUARD::QAB(A),XB(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • B(a);SBLOCK::B(E)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR(A)
        • B(a);SBLOCK::B(E)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(A),XS(b)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR(A)
        • B(a);SBLOCK::B(E)
      • Refutation
        • S(b);
    • Try
      • Q(A);XS(b)
      • Threat
        • QAR(A)
      • Vars
        • B(a);SBLOCK::B(E)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • B(a);SBLOCK::B(E)
      • S(b);N_GUARD::QAB(A),XB(a)
      • S(b);S_CUTB(a)::P(C)
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