MESON Chess Problem Database

Problem Display
PID: 2448 (5R2/8/3k4/3B4/8/3K4/3Q4/8 w - - 0 1)

Kling, Josef

The Chess Euclid, 1849

5R2/8/3k4/3B4/8/3K4/3Q4/8

#2

4 + 1

162 Land and Water 1871

SOLUTION

  • SOUND
  • Tries
    • 1.Qa5?
      • 1...Kd7
        • 2.Qd8#
      • 1...Ke7
        • 2.Qd8#
      • 1...Ke5!
    • 1.Qg5?
      • 1...Kc7
        • 2.Qd8#
      • 1...Kd7
        • 2.Qd8#
      • 1...Kc5!
  • Keys
    • 1.Rd8+!
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke5
        • 2.Qg5#
      • 1...Kc7
        • 2.Qa5#
      • 1...Ke7
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(D);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR2(A)
      • K(a);S_FLIGHT::QAB(A)
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