MESON Chess Problem Database

Problem Display
PID: 122370 (6B1/Nn2B3/8/8/QP1k1p2/6N1/4P3/1nK5 w - - 0 1)

Lewis, RS

Chess, 1956

6B1/Nn2B3/8/8/QP1k1p2/6N1/4P3/1nK5

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Sb5#
      • 2.Bf6#
      • 2.Qa1#
    • 1...Ke5
      • 2.Sc6#
  • Tries
    • 1.Sc6+?
      • 1...Kc3
        • 2.Se4#
        • 2.Bf6#
        • 2.Qc2#
        • 2.Qb3#
        • 2.Qa1#
      • 1...Ke3!
    • 1.Qd1+?
      • 1...Kc3
        • 2.Se4#
        • 2.Sb5#
        • 2.Qd3#
      • 1...Ke3
        • 2.Qg1#
      • 1...Ke5
        • 2.Sc6#
        • 2.Qd5#
      • 1...Sd2!
    • 1.b5+?
      • 1...Kc3
        • 2.Se4#
        • 2.Bf6#
        • 2.Qa1#
        • 2.Qb4#
        • 2.Qc4#
      • 1...Ke5
        • 2.Sc6#
        • 2.Qe4#
      • 1...Ke3!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Bf6#
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke3
        • 2.Bc5#
      • 1...Ke5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(D)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • P(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • B(G)
    • Vars
      • K(b);S_FLIGHT::S(F)
      • K(b);S_FLIGHT::QAR(D)+B(G),DCHECK
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