MESON Chess Problem Database

Problem Display
PID: 9956 (8/2rQ1pKB/R2N1N2/8/3k4/PP6/Pq2p3/3rbR2 w - - 0 1)

Rice, John Michael

4th Prize, BCF 100. Ty., 1961-1962

8/2rQ1pKB/R2N1N2/8/3k4/PP6/Pq2p3/3rbR2

#2

10 + 7

3174 The Two-move Chess Problem Tradition and Development 1966
14869 British Championship Solving Ty. 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Sb5#
    • 1...Ke3
      • 2.Sf5#
    • 1...Kc5
      • 2.Se4#
    • 1...Ke5
      • 2.Sxf7#
  • Tries
    • 1.Rf4+?
      • 1...Kc3
        • 2.Sb5#
      • 1...Kc5
        • 2.Se4#
        • 2.Rc4#
        • 2.Qb5#
        • 2.Qxc7#
      • 1...Ke5
        • 2.Re4#
        • 2.Qf5#
      • 1...Ke3!
  • Keys
    • 1.Qg4+!
      • 1...Kc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kc5
        • 2.Qc4#
      • 1...Ke5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::S(F)
    • K(e);P_PINS(G),S_FLIGHT::S(F)
    • K(e);S_FLIGHT::S(F),XP(g)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(e);S_FLIGHT::S(F)
      • Refutation
        • K(e);P_PINS(G),S_FLIGHT
  • Actual
    • Q(H);CHECK
    • Vars
      • K(e);OGATE,S_FLIGHT::QAB1(H)
      • K(e);P_PINS(G),S_FLIGHT::QAB1(H)
      • K(e);OGATE,P_PINS(G),S_FLIGHT::QAR1(H)
      • K(e);S_FLIGHT::QAR1(H)
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