MESON Chess Problem Database

Problem Display
PID: 207106 (8/b1R2p2/8/2n5/2kN4/2P5/3K2Q1/8 w - - 0 1)

Healey, Frank

A Collection of Two Hundred Chess Problems (Healey), 1866

8/b1R2p2/8/2n5/2kN4/2P5/3K2Q1/8

#2

5 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qg8#
    • 1...f6
      • 2.Qg8#
  • Tries
    • 1.Rxc5+?
      • 1...Kxc5
        • 2.Qc6#
      • 1...Bxc5!
    • 1.Qc6?
      • 1...Bb8
        • 2.Qxc5#
      • 1...f5
        • 2.Qe6#
      • 1...f6
        • 2.Qe6#
      • 1...Bb6!
    • 1.Qg5?
      • 1...f5
        • 2.Qg8#
      • 1...Bb8
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...f6
        • 2.Qg8#
      • 1...Bb6!
    • 1.Qg7?
      • threat
        • 2.Qxf7#
      • 1...f5
        • 2.Qf7#
        • 2.Qg8#
      • 1...f6
        • 2.Qf7#
        • 2.Qg8#
      • 1...Kd5!
  • Keys
    • 1.Qa8!
      • 1...Bb6
        • 2.Qa2#
      • 1...Bb8
        • 2.Qa2#
      • 1...f5
        • 2.Qg8#
      • 1...f6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATEB::QAB(B)
  • Tries
    • Try
      • R(E);CHECK,XS(b)
      • Vars
        • K(a);P-FLIGHT,XR(E)::QAR1(B)
      • Refutation
        • B(c);XR(E)
    • Try
      • Q(B);
      • Vars
        • B(c);N_GUARD::QAR1(B),XS(b)
        • P(d);N_GUARD::QAB(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);
      • Vars
        • P(d);OGATEB::QAB(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);
      • Threat
        • QAB(B),XP(d)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • B(c);OGATE::QAB(B)
      • P(d);OGATEB::QAB(B)
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Developed and maintained by Brian Stephenson.
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