MESON Chess Problem Database

Problem Display
PID: 173126 (4Q3/8/8/8/1kB5/1P6/8/R3K3 w Q - 0 1)

Notaro, Rosario

Problem Observer, 1978

4Q3/8/8/8/1kB5/1P6/8/R3K3

#2

5 + 1

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Ra5?
      • 1...Kxa5
        • 2.Qb5#
      • 1...Kc3!
    • 1.Qd7?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kc5!
    • 1.Qe2?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kc5!
    • 1.Qd8?
      • threat
        • 2.Qa5#
      • 1...Kc3
        • 2.Qd2#
      • 1...Kc5!
  • Keys
    • 1.0-0-0!
      • 1...Ka3
        • 2.Qa4#
      • 1...Kc3
        • 2.Qe1#
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Vars
        • K(a);S_FLIGHT,XR(A)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • K(B);0-0-0
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::QAB(E)
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