MESON Chess Problem Database

Problem Display
PID: 187627 (Q5r1/4K3/7k/4BB2/8/8/8/8 w - - 0 1)

White, Alain Campbell

British Chess Magazine, 1909

Q5r1/4K3/7k/4BB2/8/8/8/8

#2

4 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Qh8#
  • Keys
    • 1.Bf4+!
      • 1...Kh5
        • 2.Qh1#
      • 1...Kg7
        • 2.Qa1#
      • 1...Rg5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE,SBLOCK::QAR2(D)
  • Actual
    • B(A);CHECK
    • Vars
      • K(a);P-FLIGHT::QAR(D)
      • K(a);S_FLIGHT::QAB(D)
      • R(b);OGATE,P_SPINR(b)::QAR2(D)
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