MESON Chess Problem Database

Problem Display
PID: 27354 (5R2/8/8/8/4Qb2/1k6/1P6/Kn6 w - - 0 1)

Lincoln, Robert A

StrateGems, 2001

5R2/8/8/8/4Qb2/1k6/1P6/Kn6

#2

4 + 3

4883 Still More Fun with Chess Miniatures 2002
136 Problem Observer 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Rb8#
    • 1...Bg5
      • 2.Rb8#
    • 1...Bh6
      • 2.Rb8#
    • 1...Bb8
      • 2.Rxb8#
  • Tries
    • 1.Rxf4?
      • threat
        • 2.Qa4#
        • 2.Qc4#
      • 1...Sd2
        • 2.Qd3#
        • 2.Qa4#
      • 1...Sa3
        • 2.Rf3#
        • 2.Qd3#
        • 2.Qa4#
      • 1...Sc3!
    • 1.Rc8?
      • threat
        • 2.Qc4#
      • 1...Sd2
        • 2.Rc3#
      • 1...Sa3
        • 2.Rc3#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Bc7!
    • 1.Qd5+?
      • 1...Ka4
        • 2.Rxf4#
      • 1...Kb4
        • 2.Rxf4#
      • 1...Kc2!
  • Keys
    • 1.Ra8!
      • threat
        • 2.Qa4#
      • 1...Sc3
        • 2.Ra3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(c);N_GUARD::R(D)
    • B(c);N_GUARD::R(D),XB(c)
  • Tries
    • Try
      • R(D);XB(c)
      • Threat
        • DUALS(2)
      • Refutation
        • S(a);
    • Try
      • R(D);
      • Threat
        • QAB1(C)
      • Vars
        • S(a);N_GUARD::R1(D)
        • S(a);N_GUARD::R1(D),XS(a)
      • Refutation
        • B(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::R(D),XB(c)
        • K(b);P-FLIGHT::R(D),XB(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • QAB1(C)
    • Vars
      • S(a);N_GUARD::R1(D)
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