MESON Chess Problem Database

Problem Display
PID: 205694 (1B6/8/k1p5/8/1QK5/8/8/8 w - - 0 1)

de Savignac Castelet, G Arnaud

La Strategie, 1925

1B6/8/k1p5/8/1QK5/8/8/8

#2

3 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qb5#
  • Tries
    • 1.Qa3+?
      • 1...Kb6
        • 2.Qa7#
      • 1...Kb7!
    • 1.Qb1?
      • 1...c5
        • 2.Qb5#
      • 1...Ka5!
    • 1.Qb2?
      • 1...c5
        • 2.Qb5#
      • 1...Ka5!
    • 1.Qb3?
      • 1...c5
        • 2.Qb5#
      • 1...Ka5!
    • 1.Qa4+?
      • 1...Kb6
        • 2.Qa7#
      • 1...Kb7!
    • 1.Qb7+?
      • 1...Ka5
        • 2.Qa7#
      • 1...Kxb7!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qa7#
      • 1...Ka5
        • 2.Qa7#
      • 1...Kb6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);P-FLIGHT::QAB1(A)
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