MESON Chess Problem Database

Problem Display
PID: 23883 (8/8/8/8/4Q3/Kn6/2R2p2/5kr1 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/8/8/4Q3/Kn6/2R2p2/5kr1

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qxh1#
    • 1...Sa1
      • 2.Rc1#
    • 1...Sc1
      • 2.Rxc1#
    • 1...Sd2
      • 2.Rc1#
    • 1...Sd4
      • 2.Rc1#
    • 1...Sa5
      • 2.Rc1#
    • 1...Sc5
      • 2.Rc1#
  • Tries
    • 1.Qd3+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg2!
    • 1.Qc4+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg2!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxf2#
      • 1...Ke1
        • 2.Qe2#
      • 1...Rg2
        • 2.Qd1#
      • 1...Sd2
        • 2.Rc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);OGATEB::QAR2(C),XR(b)
    • S(d);N_GUARD::R(A)
    • S(d);N_GUARD::R(A),XS(d)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
  • Actual
    • Q(C);P_PINP(c)
    • Threat
      • QAR1(C),XP(c)
    • Vars
      • K(a);N_SPINP(c),P-FLIGHT::QAR1(C)
      • R(b);SBLOCK::QAR2(C)
      • S(d);N_GUARD::R(A)
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