MESON Chess Problem Database

Problem Display
PID: 186066 (8/8/1p6/1KQ5/8/8/5pNR/5k2 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2017

8/8/1p6/1KQ5/8/8/5pNR/5k2

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Rh1+?
      • 1...Ke2
        • 2.Qe3#
      • 1...Kxg2!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Rh1#
        • 2.Qxf2#
        • 2.Qc1#
      • 1...Ke1
        • 2.Qc1#
      • 1...Kg1
        • 2.Qxf2#
      • 1...bxc5
        • 2.Rh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XS(A)
  • Actual
    • S(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);P-FLIGHT::QAR2(D)
      • K(a);P-FLIGHT,P_SPINP(b)::QAB1(D),XP(b)
      • P(c);XQ(D)::R(B)
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