MESON Chess Problem Database

Problem Display
PID: 12002 (8/K3NQ2/2pk4/8/2p5/2N4B/8/B7 w - - 0 1)

Mitchell, H

The Problemist, 1973

8/K3NQ2/2pk4/8/2p5/2N4B/8/B7

#2

6 + 3

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Sb5#
  • Tries
    • 1.Sf5+?
      • 1...Kc5
        • 2.Qe7#
        • 2.Qf8#
      • 1...Ke5!
    • 1.Sxc6?
      • 1...Kc5
        • 2.Qd5#
      • 1...Kxc6!
    • 1.Sg6?
      • threat
        • 2.Se4#
        • 2.Qe7#
      • 1...c5
        • 2.Qd7#
      • 1...Kc5!
    • 1.Qe6+?
      • 1...Kc7
        • 2.Qd7#
      • 1...Kc5!
  • Keys
    • 1.Qf8!
      • 1...Kc5
        • 2.Sf5#
      • 1...Ke5
        • 2.Sxc6#
      • 1...Kc7
        • 2.Qb8#
      • 1...c5
        • 2.Sb5#

Anticipated by 51449(1961)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD,SBLOCK::S(B)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(E);XP(b)
      • Vars
        • K(c);S_FLIGHT::QAR1(F)
      • Refutation
        • K(c);P-FLIGHT,XS(E)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK::QAR1(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(F)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(c);S_FLIGHT::QAB(F)+S(E)
      • K(c);S_FLIGHT::S(E),XP(b)
      • K(c);S_FLIGHT::QAB1(F)
      • P(b);N_GUARD,SBLOCK::S(B)
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