MESON Chess Problem Database

Problem Display
PID: 234790 (7b/8/2p1p3/3k4/8/B2K4/8/Q7 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2016

7b/8/2p1p3/3k4/8/B2K4/8/Q7

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qxd4#
    • 1...Be5
      • 2.Qh1#
      • 2.Qa2#
    • 1...e5
      • 2.Qa2#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qc5#
      • 1...Bd4
        • 2.Qxd4#
      • 1...c5
        • 2.Qxc5#
      • 1...e5
        • 2.Qb3#
        • 2.Qc4#
      • 1...Bxc3!
    • 1.Qxh8?
      • threat
        • 2.Qd4#
      • 1...e5
        • 2.Qg8#
      • 1...c5!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qc5#
      • 1...Ke5
        • 2.Qg5#
      • 1...c5
        • 2.Qxc5#
      • 1...Bd4
        • 2.Qxd4#
      • 1...e5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(d);N_GUARD::QAR1(A),XB(d)
    • P(c);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(d);N_GUARD::QAR1(A),XB(d)
        • P(b);::QAR1(A),XP(b)
      • Refutation
        • B(d);XQ(A)
    • Try
      • Q(A);XB(d)
      • Threat
        • QAR1(A)
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);::QAR1(A),XP(b)
      • B(d);N_GUARD::QAR1(A),XB(d)
      • P(c);OGATEB,SBLOCK::QAB(A)
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