MESON Chess Problem Database

Problem Display
PID: 47428 (8/8/2ppp3/3k4/8/N3K3/8/4Q3 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

8/8/2ppp3/3k4/8/N3K3/8/4Q3

#2

3 + 4

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa5#
  • Tries
    • 1.Kd3?
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qe4#
      • 1...e5!
    • 1.Qd2+?
      • 1...Kc5
        • 2.Qa5#
        • 2.Qd4#
      • 1...Ke5!
    • 1.Qc3?
      • threat
        • 2.Qd4#
      • 1...e5
        • 2.Qc4#
      • 1...c5!
    • 1.Qb4?
      • threat
        • 2.Qd4#
      • 1...c5
        • 2.Qe4#
      • 1...e5
        • 2.Qc4#
      • 1...Ke5!
    • 1.Qd1+?
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke5!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qd4#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke5
        • 2.Qg5#
      • 1...c5
        • 2.Qe4#
      • 1...e5
        • 2.Qc4#

Anticipated by 171072(1996), 172464(1999)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(d);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(b);SBLOCK::QAB1(A)
        • P(d);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);SBLOCK::QAB1(A)
      • P(d);SBLOCK::QAB1(A)
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