MESON Chess Problem Database

Problem Display
PID: 207557 (5Q2/5BN1/3p4/2p1q3/4k3/2Pr1pP1/1N6/R4K2 w - - 0 1)

Rudge, Mary

Amateur Chess Magazine, 1872

5Q2/5BN1/3p4/2p1q3/4k3/2Pr1pP1/1N6/R4K2

#2

8 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.Qxe7#
    • 1...Qe8
      • 2.Qxe8#
    • 1...Rd4
      • 2.Re1#
    • 1...Rd5
      • 2.Re1#
  • Tries
    • 1.Bg6+?
      • 1...Ke3
        • 2.Sc4#
      • 1...Kd5
        • 2.Qa8#
      • 1...Qf5!
  • Keys
    • 1.Bd5+!
      • 1...Ke3
        • 2.Sc4#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Qxd5
        • 2.Qf4#
      • 1...Rxd5
        • 2.Re1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(e);OGATEB::QAR(H),XQ(e)
    • R(a);N_GUARD::R(A)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(c);P-FLIGHT::S(C)
        • K(c);S_FLIGHT::QAB(H)
      • Refutation
        • Q(e);P_SPINQ(e)
  • Actual
    • B(F);CHECK
    • Vars
      • K(c);P-FLIGHT::S(C)
      • K(c);S_FLIGHT,XB(F)::QAB(H)
      • Q(e);SBLOCK,XB(F)::QAR1(H)
      • R(a);SBLOCK,XB(F)::R(A)
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