MESON Chess Problem Database

Problem Display
PID: 166851 (8/b3K3/3p4/3kN3/8/2Q5/8/5R2 w - - 0 1)

Lincoln, Robert A

Kudesnik, 1998

8/b3K3/3p4/3kN3/8/2Q5/8/5R2

#2

4 + 3

15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kf6?
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qd3#
      • 1...Bd4
        • 2.Qc6#
      • 1...dxe5!
    • 1.Rd1+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Ke4!
    • 1.Re1?
      • threat
        • 2.Qc4#
      • 1...dxe5
        • 2.Rxe5#
      • 1...Be3!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qd3#
      • 1...dxe5
        • 2.Rxe5#
      • 1...Bd4
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • B(c);P_PINS(C),SBLOCK::QAB1(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • R(A);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(B),XB(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Threat
        • QAB1(B)
      • Vars
        • P(b);OGATE,XS(C)::R1(A),XP(b)
      • Refutation
        • B(c);
  • Actual
    • R(A);
    • Threat
      • QAB1(B)
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • P(b);OGATE,P_SPINP(b),XS(C)::R1(A),XP(b)
      • B(c);SBLOCK::QAB1(B)
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