MESON Chess Problem Database

Problem Display
PID: 234641 (3n4/8/1Q6/3k4/4pBB1/8/K7/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2005

3n4/8/1Q6/3k4/4pBB1/8/K7/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Bxe6#
    • 1...Sb7
      • 2.Be6#
    • 1...Sf7
      • 2.Be6#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Qd6#
      • 1...e3
        • 2.Bf3#
      • 1...Sb7
        • 2.Be6#
      • 1...Sf7
        • 2.Be6#
      • 1...Sc6!
  • Keys
    • 1.Be3!
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke5
        • 2.Qd4#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD::B(C),XS(c)
    • S(c);N_GUARD::B(C)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR1(D)
      • Vars
        • P(a);OGATEB::B(C)
        • S(c);N_GUARD::B(C)
      • Refutation
        • S(c);
  • Actual
    • B(B);
    • Threat
      • QAR1(D)
    • Vars
      • K(b);S_FLIGHT::QAB1(D)
      • K(b);P-FLIGHT::QAB1(D)
      • S(c);N_GUARD::QAB1(D),XS(c)
      • S(c);N_GUARD::QAB1(D)
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