MESON Chess Problem Database

Problem Display
PID: 7690 (8/3R4/8/5p2/2p1N3/4k3/2K3Q1/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 1992

8/3R4/8/5p2/2p1N3/4k3/2K3Q1/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qg3#
      • 1...f4
        • 2.Sd1#
        • 2.Qe2#
      • 1...Kf4!
    • 1.Sg5?
      • threat
        • 2.Qf3#
        • 2.Qd2#
      • 1...c3
        • 2.Qf3#
      • 1...Kf4!
    • 1.Rd4?
      • threat
        • 2.Qf2#
      • 1...Kf4
        • 2.Qg3#
      • 1...fxe4
        • 2.Rxe4#
      • 1...Kxd4!
    • 1.Qg3+?
      • 1...Ke2
        • 2.Qf2#
      • 1...Kxe4!
  • Keys
    • 1.Re7!
      • threat
        • 2.Qf2#
      • 1...Kd4
        • 2.Qd2#
      • 1...Kf4
        • 2.Qg3#
      • 1...fxe4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • P(c);OGATE,XS(C)::R1(D),XP(c)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
  • Actual
    • R(D);
    • Threat
      • QAB1(B)
    • Vars
      • K(a);S_FLIGHT::QAR2(B)
      • K(a);S_FLIGHT::QAB1(B)
      • P(c);OGATE,P_SPINP(c),XS(C)::R1(D),XP(c)
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