MESON Chess Problem Database

Problem Display
PID: 234443 (4k2n/3p2K1/1b2p3/3p4/2pp3B/8/8/2Q5 w - - 0 1)

Lincoln, Robert A

Die Schwalbe, 1993

4k2n/3p2K1/1b2p3/3p4/2pp3B/8/8/2Q5

#2

3 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qe7#
        • 2.Qf8#
      • 1...d6
        • 2.Qa4#
      • 1...Bc5
        • 2.Qa8#
      • 1...Bd8
        • 2.Qf8#
      • 1...Sg6!
    • 1.Qf4?
      • threat
        • 2.Qf8#
      • 1...Bc5
        • 2.Qb8#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...d6!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qe7#
      • 1...Bc5
        • 2.Qd8#
      • 1...Bd8
        • 2.Qxd8#
      • 1...Sg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);OGATEB::QAB(A)
        • B(d);N_GUARD::QAR(A)
        • B(d);::QAR1(A)
      • Refutation
        • S(h);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(d);N_GUARD::QAR(A)
        • S(h);N_GUARD::QAB1(A)
        • S(h);N_GUARD::QAB1(A),XS(h)
      • Refutation
        • P(f);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(d);N_GUARD::QAR1(A)
      • B(d);N_GUARD::QAR1(A),XB(d)
      • S(h);N_GUARD::QAB(A),XS(h)
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