MESON Chess Problem Database

Problem Display
PID: 153154 (2kn4/Q7/R7/2BB4/3K4/8/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

2kn4/Q7/R7/2BB4/3K4/8/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Bb6?
      • threat
        • 2.Qc7#
      • 1...Se6+
        • 2.Bxe6#
      • 1...Sb7
        • 2.Be6#
        • 2.Qxb7#
      • 1...Sc6+!
    • 1.Rd6?
      • 1...Se6+
        • 2.Bxe6#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sf7
        • 2.Be6#
        • 2.Qb7#
      • 1...Sc6+!
    • 1.Qd7+?
      • 1...Kb8
        • 2.Bd6#
        • 2.Ba7#
        • 2.Ra8#
        • 2.Qxd8#
      • 1...Kxd7!
  • Keys
    • 1.Be7!
      • 1...Sc6+
        • 2.Rxc6#
      • 1...Se6+
        • 2.Bxe6#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sf7
        • 2.Be6#
        • 2.Rc6#
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(E)
      • Vars
        • S(b);CHECK,N_GUARD::B(C),XS(b)
      • Refutation
        • S(b);CHECK
    • Try
      • R(D);
      • Vars
        • S(b);CHECK,N_GUARD::B(C),XS(b)
        • S(b);N_GUARD::QAB1(E),XS(b)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(E)
  • Actual
    • B(B);
    • Vars
      • S(b);CHECK,N_GUARD::R(D),XS(b)
      • S(b);CHECK,N_GUARD::B(C),XS(b)
      • S(b);N_GUARD::QAB1(E),XS(b)
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