MESON Chess Problem Database

Problem Display
PID: 75957 (1Q6/p2p4/r2N1K2/2kp4/2P5/2B5/8/8 w - - 0 1)

Flynn, Father P

1st Prize, The Tablet, 1920

(First published on Sat Nov 13 1920)

1Q6/p2p4/r2N1K2/2kp4/2P5/2B5/8/8

#2

5 + 5

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc7#
    • 1...Ra2
      • 2.Qc7#
    • 1...Ra3
      • 2.Qc7#
    • 1...Ra4
      • 2.Qc7#
    • 1...Ra5
      • 2.Qc7#
    • 1...Rc6
      • 2.Qb4#
  • Tries
    • 1.Bb4+?
      • 1...Kc6
        • 2.Qb7#
      • 1...Kd4!
    • 1.Qc8+?
      • 1...Kb6
        • 2.c5#
      • 1...Kxd6
        • 2.Bb4#
        • 2.Be5#
        • 2.c5#
      • 1...Rc6!
  • Keys
    • 1.Qb5+!
      • 1...Kxd6
        • 2.Be5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(c);N_GUARD,N_PINS(C)::QAR2(E)
    • R(c);SBLOCK::QAB1(E)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(a);N_PINS(C),P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);N_PINS(C),OGATE,S_FLIGHT::P(B)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • Q(E);CHECK
    • Vars
      • K(a);S_FLIGHT,XS(C)::B(A)
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