MESON Chess Problem Database

Problem Display
PID: 133328 (7r/6pr/7b/q2p2p1/p1pp4/Q3pk1P/6NB/1B3K2 w - - 0 1)

Ravenscroft, Frank

The Field, 1960

(First published on Thu Dec 8 1960)

7r/6pr/7b/q2p2p1/p1pp4/Q3pk1P/6NB/1B3K2

#2

6 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1+
      • 2.Sxe1#
    • 1...Qb6
      • 2.Se1#
    • 1...Qc7
      • 2.Se1#
    • 1...Qd8
      • 2.Se1#
    • 1...Qb5
      • 2.Se1#
    • 1...Qc5
      • 2.Se1#
    • 1...Qa6
      • 2.Se1#
    • 1...Qa7
      • 2.Se1#
    • 1...Qa8
      • 2.Se1#
    • 1...Rf8
      • 2.Qxf8#
    • 1...c3
      • 2.Se1#
    • 1...g4
      • 2.Sh4#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qe2#
        • 2.Qf5#
      • 1...Qe1+
        • 2.Sxe1#
      • 1...Qd2
        • 2.Qf5#
      • 1...Qc7
        • 2.Se1#
        • 2.Qe2#
      • 1...Rf8
        • 2.Qe2#
      • 1...g4
        • 2.Sh4#
        • 2.Qe2#
      • 1...g6
        • 2.Qe2#
      • 1...cxd3!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qf7#
      • 1...Qe1+
        • 2.Sxe1#
      • 1...e2+
        • 2.Qxe2#
      • 1...Qb6
        • 2.Se1#
      • 1...Qc7
        • 2.Se1#
      • 1...Qd8
        • 2.Se1#
      • 1...Qa6
        • 2.Se1#
      • 1...Qa7
        • 2.Se1#
      • 1...Rf8
        • 2.Qxf8#
      • 1...d3
        • 2.Qxe3#
      • 1...g4
        • 2.Sh4#
      • 1...g6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(f);CHECK,N_GUARD::S(C),XQ(f)
    • Q(f);N_GUARD::S(C)
    • R(l);N_GUARD::QAR(E),XR(l)
    • P(d);N_SPINP(a),S_CUTQ(f)::S(C)
    • P(h);N_GUARD::S(C)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);CHECK,N_GUARD::S(C),XQ(f)
        • Q(f);::QAR2(E)
        • R(l);::QAB1(E)
        • P(j);::QAB1(E)
      • Refutation
        • P(d);N_SPINP(a),XQ(E)
  • Actual
    • Q(E);N_PINP(a)
    • Threat
      • QAR(E)
    • Vars
      • Q(f);CHECK,N_GUARD::S(C),XQ(f)
      • P(a);CHECK,OGATE::QAB1(E),XP(a)
      • Q(f);N_GUARD::S(C)
      • R(l);N_GUARD::QAR(E),XR(l)
      • P(e);N_GUARD::QAR1(E),XP(a)
      • P(h);N_GUARD::S(C)
      • P(j);N_GUARD::QAR(E)
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