MESON Chess Problem Database

Problem Display
PID: 7508 (k7/1p1N4/8/2B5/8/8/6K1/2b3Q1 w - - 0 1)

Lincoln, Robert A

The Problemist, 1990

k7/1p1N4/8/2B5/8/8/6K1/2b3Q1

#2

4 + 3

2838 Fun with Chess Miniatures 1996
145 StrateGems 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qa1#
    • 1...Bf4
      • 2.Qa1#
    • 1...Bg5
      • 2.Qa1#
    • 1...Bh6
      • 2.Qa1#
  • Tries
    • 1.Kh1?
      • threat
        • 2.Qg8#
      • 1...b5
        • 2.Qg2#
      • 1...Bf4
        • 2.Qa1#
      • 1...Bg5
        • 2.Qa1#
      • 1...Bh6
        • 2.Qa1#
      • 1...b6!
    • 1.Kh3?
      • threat
        • 2.Qg8#
      • 1...b5
        • 2.Qh1#
        • 2.Qg2#
      • 1...Bf4
        • 2.Qa1#
      • 1...Bg5
        • 2.Qa1#
      • 1...Bh6
        • 2.Qa1#
      • 1...b6!
    • 1.Qf2?
      • threat
        • 2.Qf8#
      • 1...b5
        • 2.Qf3#
      • 1...Bf4
        • 2.Qa2#
      • 1...Bg5
        • 2.Qa2#
      • 1...Bh6
        • 2.Qa2#
      • 1...b6!
    • 1.Qh2?
      • threat
        • 2.Qb8#
        • 2.Qh8#
      • 1...b5
        • 2.Qb8#
      • 1...b6
        • 2.Qb8#
      • 1...Bb2
        • 2.Qb8#
      • 1...Bg5
        • 2.Qb8#
      • 1...Bh6
        • 2.Qb8#
      • 1...Bf4!
    • 1.Qd4?
      • threat
        • 2.Qh8#
        • 2.Qa4#
      • 1...b5
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bf4
        • 2.Qa1#
        • 2.Qa4#
      • 1...Bb2
        • 2.Qa4#
      • 1...Bd2
        • 2.Qh8#
      • 1...Bg5
        • 2.Qa1#
        • 2.Qa4#
      • 1...Bh6
        • 2.Qa1#
        • 2.Qa4#
      • 1...b6!
    • 1.Qe1?
      • threat
        • 2.Qa5#
        • 2.Qe8#
      • 1...b5
        • 2.Qe4#
      • 1...Bf4
        • 2.Qa5#
        • 2.Qa1#
      • 1...Bd2
        • 2.Qe8#
      • 1...Be3
        • 2.Qa5#
        • 2.Qa1#
      • 1...Bg5
        • 2.Qa5#
        • 2.Qa1#
      • 1...b6!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf8#
      • 1...b5
        • 2.Qf3#
      • 1...b6
        • 2.Qa6#
      • 1...Bf4
        • 2.Qa1#
      • 1...Bg5
        • 2.Qa1#
      • 1...Bh6
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);OGATE::QAB(A)
    • B(a);OGATE,SBLOCK::QAB(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • P(b);OGATEB::QAB(A)
        • B(a);OGATE::QAB(A)
        • B(a);OGATE,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • B(a);OGATE::QAB(A)
        • B(a);OGATE,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(b);OGATEB::QAB(A)
        • B(a);N_GUARD::QAR(A)
        • B(a);N_GUARD,SBLOCK::QAR(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(A)
        • B(a);::QAR1(A)
        • B(a);SBLOCK::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR(A)
        • B(a);::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATEB::QAB(A)
        • B(a);::QAR(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • P(b);OGATEB::QAB(A)
      • P(b);N_GUARD::QAR2(A)
      • B(a);OGATE::QAB(A)
      • B(a);OGATE,SBLOCK::QAB(A)
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