MESON Chess Problem Database

Problem Display
PID: 790 (R4N1n/8/2k5/P6p/1K2N3/2P1p3/5pQB/7b w - - 0 1)

Driver, John Edward

British Chess Magazine, 1962

R4N1n/8/2k5/P6p/1K2N3/2P1p3/5pQB/7b

#2

8 + 6

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sf6#
    • 1...Kb7
      • 2.Sc5#
  • Tries
    • 1.Sg3+?
      • 1...Kd6
        • 2.Sf5#
      • 1...Kc7
        • 2.Sf1#
        • 2.Sxh1#
        • 2.Se2#
        • 2.Sf5#
        • 2.Sxh5#
      • 1...Bxg2!
    • 1.Sd6+?
      • 1...Kc7
        • 2.Sc4#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sb7#
        • 2.Sf7#
        • 2.Se8#
        • 2.Rc8#
      • 1...Bxg2!
    • 1.Ra6+?
      • 1...Kd5
        • 2.Sf6#
        • 2.Rd6#
      • 1...Kb7!
    • 1.Rc8+?
      • 1...Kd5
        • 2.Sf6#
        • 2.Rc5#
      • 1...Kb7!
    • 1.Qf1?
      • threat
        • 2.Qb5#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kb7
        • 2.Qa6#
      • 1...e2!
    • 1.Qg4?
      • threat
        • 2.Qd7#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kb7
        • 2.Qc8#
      • 1...hxg4!
    • 1.Qg6+?
      • 1...Kd5
        • 2.Rd8#
        • 2.Qe6#
      • 1...Kb7
        • 2.Qa6#
      • 1...Sxg6!
    • 1.Qg7?
      • threat
        • 2.Qd7#
      • 1...Kd5
        • 2.Qb7#
      • 1...Sf7!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qd7#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kb7
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::QAB(A)+S(E),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P-FLIGHT::B(B)+S(E),DCHECK
      • Refutation
        • B(a);XQ(A)
    • Try
      • S(E);CHECK
      • Refutation
        • B(a);XQ(A)
    • Try
      • R(G);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(G);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • S(f);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(e);S_FLIGHT::QAB(A)
      • Refutation
        • S(f);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);S_FLIGHT::QAB1(A)
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