MESON Chess Problem Database

Problem Display
PID: 18443 (n7/5R2/r2pp3/1Q1Pk3/8/p3K3/8/8 w - - 0 1)

Ruff, Ian

Time & Tide, 1955

n7/5R2/r2pp3/1Q1Pk3/8/p3K3/8/8

#2

4 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...exd5
      • 2.Qe8#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qe4#
        • 2.Qd4#
      • 1...exd5
        • 2.Qf5#
      • 1...Ra4!
    • 1.Qa4?
      • threat
        • 2.Qd4#
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qb5#
      • 1...exd5
        • 2.Qe8#
      • 1...Rxa4!
    • 1.Qd7?
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qb5#
      • 1...exd5
        • 2.Rf5#
        • 2.Qf5#
        • 2.Qe8#
        • 2.Qe7#
      • 1...Sc7!
    • 1.Qe8?
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qb5#
      • 1...Sc7!
    • 1.Qb1?
      • threat
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qb5#
      • 1...exd5
        • 2.Qf5#
      • 1...Ra4!
    • 1.Qb2+?
      • 1...Kxd5
        • 2.Qb5#
      • 1...axb2!
    • 1.dxe6+?
      • 1...Kxe6
        • 2.Qf5#
      • 1...d5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qh5#
      • 1...Kxd5
        • 2.Qb5#
      • 1...exd5
        • 2.Kd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(e);OGATEB,P_SPINP(e),SBLOCK,XP(C)::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);N_GUARD,SBLOCK,XP(C)::QAR1(B)
      • Refutation
        • R(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
        • P(e);OGATEB,SBLOCK,XP(C)::QAR(B)
      • Refutation
        • R(c);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(e)
      • Vars
        • K(b);OGATEB,P-FLIGHT,P_SPINP(d),XP(C)::QAR2(B)
      • Refutation
        • S(f);
    • Try
      • Q(B);P_PINP(e)
      • Threat
        • QAR1(B),XP(e)
      • Vars
        • K(b);N_SPINP(e),OGATEB,P-FLIGHT,XP(C)::QAR2(B)
      • Refutation
        • S(f);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
        • P(e);N_GUARD,SBLOCK,XP(C)::QAR1(B)
      • Refutation
        • R(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
      • Refutation
        • P(a);XQ(B)
    • Try
      • P(C);CHECK,XP(e)
      • Vars
        • K(b);OGATE,P-FLIGHT,XP(C)::QAB1(B)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
      • P(e);SBLOCK,XP(C)::QAR(B)+K(A)
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