MESON Chess Problem Database

Problem Display
PID: 214369 (Q3K3/4B3/2R5/5k2/8/8/8/6N1 w - - 0 1)

Barrier, ?

A Chess Century, 1878

Q3K3/4B3/2R5/5k2/8/8/8/6N1

#2

5 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rc4?
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Ke6
        • 2.Qe4#
      • 1...Kg6!
    • 1.Rc5+?
      • 1...Kf4
        • 2.Qf3#
      • 1...Kg4
        • 2.Qf3#
      • 1...Ke6
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qc6#
        • 2.Qa2#
        • 2.Qa6#
        • 2.Qc8#
      • 1...Kg6!
  • Keys
    • 1.Re6!
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qf3#
      • 1...Kg4
        • 2.Qf3#
      • 1...Kxe6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • K(a);S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • QAB1(D)
    • Vars
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);S_FLIGHT,XR(B)::QAR2(D)
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