MESON Chess Problem Database

Problem Display
PID: 139657 (k7/1pK5/2n5/P2Q4/8/5B2/8/8 w - - 0 1)

Davis, Edward

Kipping, Cyril Stanley

The Problemist, 1937

k7/1pK5/2n5/P2Q4/8/5B2/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qxb7#
    • 1...Sd4
      • 2.Qxb7#
    • 1...Sxa5
      • 2.Qxa5#
    • 1...Se5
      • 2.Qxb7#
    • 1...Sa7
      • 2.Qxb7#
    • 1...Se7
      • 2.Qxb7#
    • 1...Sb8
      • 2.Qxb7#
  • Tries
    • 1.Kb6?
      • 1...Sxa5
        • 2.Qg8#
        • 2.Qd8#
      • 1...Sb4
        • 2.Qxb7#
        • 2.Qg8#
        • 2.Qd8#
      • 1...Sd4
        • 2.Qxb7#
        • 2.Qg8#
        • 2.Qd8#
      • 1...Se5
        • 2.Qxb7#
        • 2.Qg8#
        • 2.Qd8#
      • 1...Sa7
        • 2.Qxb7#
      • 1...Se7
        • 2.Qxb7#
      • 1...Sb8
        • 2.Qxb7#
      • 1...Sd8
        • 2.Qxd8#
      • 1...Kb8!
    • 1.Qxc6?
      • threat
        • 2.Qxb7#
        • 2.Qa6#
      • 1...Ka7
        • 2.Qxb7#
      • 1...bxc6!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Sxa5
        • 2.Qa6#
        • 2.Qxa5#
      • 1...Sd8
        • 2.Qa6#
      • 1...b6
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(a);OGATE,P_SPINP(b)::QAB1(C),XP(b)
    • S(a);OGATE,P_SPINP(b),XP(B)::QAR(C),XS(a)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • S(a);OGATE,P_SPINP(b)::QAB1(C),XP(b)
        • S(a);N_GUARD,P_SPINP(b)::QAR(C),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);P_PINP(b),XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(C),XP(b)
      • Refutation
        • P(b);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XP(b)
    • Vars
      • K(c);P-FLIGHT::QAR1(C),XP(b)
      • S(a);N_GUARD,P_SPINP(b)::QAR2(C)
      • P(b);N_GUARD,P_SPINS(a)::QAR2(C)
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