MESON Chess Problem Database

Problem Display
PID: 187664 (7Q/8/8/b1K5/6b1/4p1P1/4k3/6R1 w - - 0 1)

White, Alain Campbell

British Chess Magazine, 1909

7Q/8/8/b1K5/6b1/4p1P1/4k3/6R1

#2

4 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qh2+?
      • 1...Kf3
        • 2.Qg2#
      • 1...Kd3!
  • Keys
    • 1.Rg2+!
      • 1...Kd1
        • 2.Qa1#
      • 1...Ke1
        • 2.Qh1#
      • 1...Kf1
        • 2.Qh1#
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf3
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(A);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR(D)
      • K(a);P-FLIGHT::QAR(D)
      • K(a);S_FLIGHT::QAR2(D)
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::QAB(D)
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