MESON Chess Problem Database

Problem Display
PID: 23048 (8/8/3p4/1Q3p1N/4k3/2P5/4K3/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/3p4/1Q3p1N/4k3/2P5/4K3/8

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Sf6#
    • 1...d5
      • 2.Qe8#
  • Tries
    • 1.Kd1?
      • 1...Ke3
        • 2.Qe2#
      • 1...Kf3
        • 2.Qe2#
      • 1...d5
        • 2.Qe2#
      • 1...f4!
    • 1.Ke1?
      • 1...Ke3
        • 2.Qe2#
      • 1...Kf3
        • 2.Qe2#
      • 1...d5
        • 2.Qe2#
      • 1...f4!
    • 1.Kf1?
      • 1...Ke3
        • 2.Qe2#
      • 1...Kf3
        • 2.Qe2#
      • 1...d5
        • 2.Qe2#
      • 1...f4!
    • 1.Kd2?
      • 1...Kf3
        • 2.Qe2#
      • 1...d5
        • 2.Qe2#
      • 1...f4!
    • 1.Qc6+?
      • 1...d5
        • 2.Qe8#
        • 2.Qe6#
      • 1...Ke5!
    • 1.Qa5?
      • 1...f4
        • 2.Sf6#
      • 1...d5!
    • 1.Qc5?
      • threat
        • 2.Qd4#
      • 1...f4
        • 2.Sf6#
      • 1...dxc5!
    • 1.Qb7+?
      • 1...d5
        • 2.Qe7#
      • 1...Ke5!
    • 1.c4?
      • threat
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Kd4!
  • Keys
    • 1.Kf2!
      • 1...d5
        • 2.Qe2#
      • 1...f4
        • 2.Sf6#

Anticipated by 198808(1921)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::S(D)
    • P(c);SBLOCK::QAR(C)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAB1(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAB1(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAB1(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(b);SBLOCK::S(D)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(b);SBLOCK::S(D)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • P(c);P_SPINP(c),SBLOCK::QAR(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(B);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);::QAB1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • P(c);SBLOCK::QAR2(C)
      • P(b);SBLOCK::S(D)
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