MESON Chess Problem Database

Problem Display
PID: 79019 (4Q3/1B1K1p2/8/2k5/1pN5/2bP4/8/8 w - - 0 1)

Rice, John Michael

The Tablet, 1961

(First published on Sat May 27 1961)

4Q3/1B1K1p2/8/2k5/1pN5/2bP4/8/8

#2

5 + 4

15239 Valois Notebooks 2017
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe3#
    • 1...Kb5
      • 2.Kd6#
    • 1...Be1
      • 2.Qe5#
    • 1...Bd2
      • 2.Qe5#
    • 1...Be5
      • 2.Qxe5#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qd5#
      • 1...Kb5
        • 2.Qc6#
      • 1...b3!
    • 1.Qe6?
      • threat
        • 2.Qd5#
        • 2.Qb6#
      • 1...Kd4
        • 2.Qd5#
        • 2.Qe3#
        • 2.Qd6#
      • 1...Kb5
        • 2.Qc6#
      • 1...b3
        • 2.Qb6#
      • 1...fxe6!
    • 1.Qe7+?
      • 1...Kd4
        • 2.Qd6#
        • 2.Qe3#
      • 1...Kb5!
    • 1.Qc8+?
      • 1...Kb5
        • 2.Qc6#
      • 1...Kd4!
    • 1.Qf8+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Kb5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qb6#
      • 1...Kd4
        • 2.Kc6#
      • 1...Kb5
        • 2.Qa5#

This anticipates 10421(1964)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(c);S_FLIGHT::QAB1(E)
    • K(c);P-FLIGHT::QAB(E)+K(D)
    • B(a);N_GUARD::QAR2(E)
    • B(a);N_GUARD::QAR2(E),XB(a)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(c);P-FLIGHT::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAB1(E)
        • P(b);::QAB1(E)
      • Refutation
        • P(d);XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(E)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • K(c);S_FLIGHT::QAR(E)+K(D)
      • K(c);P-FLIGHT::QAR1(E)
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