MESON Chess Problem Database

Problem Display
PID: 231075 (8/8/2p3B1/2Qp2B1/8/8/1k2K3/8 w - - 0 1)

Brixi, Heinz

Das Ratsel, 1927

8/8/2p3B1/2Qp2B1/8/8/1k2K3/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ka1
      • 2.Qa3#
  • Tries
    • 1.Bc1+?
      • 1...Ka1
        • 2.Qa3#
        • 2.Qa7#
        • 2.Qa5#
      • 1...Ka2
        • 2.Qa3#
      • 1...Kb3!
    • 1.Qb4+?
      • 1...Ka1
        • 2.Qa3#
        • 2.Qb1#
      • 1...Ka2!
    • 1.Qc2+?
      • 1...Ka1
        • 2.Qb1#
      • 1...Ka3!
  • Keys
    • 1.Be7!
      • threat
        • 2.Qa3#
      • 1...Ka1
        • 2.Qa3#
      • 1...Ka2
        • 2.Qa3#
      • 1...Kb3
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAB1(B)
    • Vars
      • K(a);S_FLIGHT::QAR2(B)
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);P-FLIGHT::QAB1(B)
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