MESON Chess Problem Database

Problem Display
PID: 7589 (7n/6K1/8/7k/2Q4p/8/8/2Bb4 w - - 0 1)

Lincoln, Robert A

The Problemist, 1991

7n/6K1/8/7k/2Q4p/8/8/2Bb4

#2

3 + 4

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Qe2#
    • 1...Be2
      • 2.Qxe2#
    • 1...Bb3
      • 2.Qe2#
    • 1...Ba4
      • 2.Qe2#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qf5#
        • 2.Qxd1#
      • 1...h3
        • 2.Qxh3#
      • 1...Bf3
        • 2.Qf5#
        • 2.Qxf3#
      • 1...Bc2
        • 2.Qe2#
        • 2.Qf3#
      • 1...Be2
        • 2.Qxe2#
        • 2.Qf5#
      • 1...Bb3
        • 2.Qe2#
        • 2.Qf5#
        • 2.Qf3#
      • 1...Ba4
        • 2.Qe2#
        • 2.Qf5#
        • 2.Qf3#
      • 1...Bg4
        • 2.Qh7#
      • 1...Sf7
        • 2.Qg6#
        • 2.Qxd1#
      • 1...Kg4!
    • 1.Qe4?
      • threat
        • 2.Qf5#
      • 1...Bc2
        • 2.Qf3#
        • 2.Qe2#
      • 1...Bg4
        • 2.Qh7#
      • 1...Sf7
        • 2.Qg6#
      • 1...h3!
    • 1.Qf4?
      • threat
        • 2.Qg5#
        • 2.Qf5#
      • 1...Bc2
        • 2.Qg5#
        • 2.Qf3#
      • 1...Bg4
        • 2.Qg5#
        • 2.Qh6#
      • 1...h3
        • 2.Qg5#
      • 1...Sf7!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qf5#
      • 1...h3
        • 2.Qxh3#
      • 1...Bc2
        • 2.Qe2#
      • 1...Bg4
        • 2.Qh6#
      • 1...Sf7
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAB(B)
    • B(a);N_GUARD::QAB(B),XB(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATEB::QAR2(B),XP(b)
        • B(a);SBLOCK::QAR2(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • B(a);SBLOCK::QAR2(B)
        • S(d);N_GUARD::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(B)
      • Refutation
        • S(d);
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • P(b);OGATEB::QAR2(B),XP(b)
      • B(a);N_GUARD::QAB(B)
      • B(a);SBLOCK::QAR1(B)
      • S(d);N_GUARD::QAB1(B)
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