MESON Chess Problem Database

Problem Display
PID: 23275 (n2brrbB/P1k1pp2/pN5R/P6R/K1N5/7B/5QP1/8 w - - 0 1)

Reeves, Alfred Christopher

The Problemist, 1997

n2brrbB/P1k1pp2/pN5R/P6R/K1N5/7B/5QP1/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb6+
      • 2.Qxb6#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Rc5#
        • 2.Qc5#
        • 2.Qc2#
      • 1...Sxb6+
        • 2.Qxb6#
      • 1...Kc6
        • 2.Rc5#
        • 2.Qc5#
        • 2.Qc2#
      • 1...e6
        • 2.Qc5#
      • 1...f6
        • 2.Qc5#
      • 1...Bh7
        • 2.Rc5#
        • 2.Qc5#
      • 1...e5
        • 2.Qc5#
        • 2.Qc2#
      • 1...f5
        • 2.Qc5#
      • 1...exd6!
    • 1.Bc8?
      • threat
        • 2.Be5#
        • 2.Rc5#
        • 2.Qc5#
      • 1...e6
        • 2.Rc5#
        • 2.Qc5#
      • 1...f6
        • 2.Rc5#
        • 2.Qc5#
      • 1...e5
        • 2.Qc5#
      • 1...f5
        • 2.Be5#
        • 2.Qc5#
      • 1...Sxb6+!
    • 1.Qg3+?
      • 1...Kb7
        • 2.Qb8#
      • 1...e5!
    • 1.Qd4?
      • threat
        • 2.Qd7#
      • 1...Sxb6+
        • 2.Qxb6#
      • 1...Kb7!
    • 1.Qf4+?
      • 1...Kb7
        • 2.Qb8#
      • 1...e5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Sxa8#
        • 2.Be5#
        • 2.Rc5#
        • 2.Qc6#
      • 1...Sxb6+
        • 2.axb6#
      • 1...e5
        • 2.Sxa8#
        • 2.Qc6#
      • 1...e6
        • 2.Be5#
        • 2.Rc5#
      • 1...f5
        • 2.Be5#
        • 2.Qc6#
      • 1...f6
        • 2.Sxa8#
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(e);CHECK,OGATE,XS(H)::QAB1(A),XS(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(3)
      • Vars
        • S(e);CHECK,OGATE,XS(H)::QAB1(A),XS(e)
        • P(c);::QAR2(A)
        • P(d);::QAR2(A)
      • Refutation
        • P(c);XS(E)
    • Try
      • B(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAR2(A)
      • Refutation
        • S(e);CHECK,XS(H)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(e);CHECK,OGATE,XS(H)::QAB1(A),XS(e)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(A);
    • Threat
      • DUALS(4)
    • Vars
      • S(e);CHECK,OGATE,XS(H)::P(F),XS(e)
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