MESON Chess Problem Database

Problem Display
PID: 39227 (8/2R5/4kp2/Q7/8/2n3BK/8/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 1992

8/2R5/4kp2/Q7/8/2n3BK/8/8

#2

4 + 3

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Kg4?
      • threat
        • 2.Qf5#
      • 1...f5+
        • 2.Qxf5#
      • 1...Sb5
        • 2.Qa2#
      • 1...Sd5!
    • 1.Qxc3?
      • 1...Kd5
        • 2.Qc4#
      • 1...f5
        • 2.Qe5#
        • 2.Qc6#
      • 1...Kf5!
    • 1.Qa4?
      • threat
        • 2.Qd7#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Sb5
        • 2.Qe4#
      • 1...f5
        • 2.Qc6#
      • 1...Sxa4!
    • 1.Qb5?
      • threat
        • 2.Qd7#
      • 1...f5
        • 2.Qc6#
        • 2.Qe5#
      • 1...Sxb5!
    • 1.Qc5?
      • threat
        • 2.Re7#
      • 1...f5
        • 2.Qd6#
        • 2.Qe5#
        • 2.Qc6#
      • 1...Sd5!
    • 1.Qa6+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5!
    • 1.Qa8?
      • 1...Sb1
        • 2.Qe4#
      • 1...Sd1
        • 2.Qe4#
      • 1...Sa2
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Sa4
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sb5
        • 2.Qe4#
      • 1...Sd5
        • 2.Qc8#
      • 1...f5
        • 2.Qc6#
      • 1...Kf5!
  • Keys
    • 1.Qb4!
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Sb1
        • 2.Qe4#
      • 1...Sd1
        • 2.Qe4#
      • 1...Sa2
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Sa4
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sb5
        • 2.Qe4#
      • 1...Sd5
        • 2.Qe4#
      • 1...f5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR1(C)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • P(c);CHECK::QAB1(C),XP(c)
        • S(a);N_GUARD::QAB(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);XS(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • S(a);N_GUARD::QAR2(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • R1(D)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • S(a);N_GUARD::QAR2(C)
        • S(a);N_GUARD::QAR2(C),XS(a)
        • S(a);SBLOCK::QAB(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::QAB1(C)
      • S(a);N_GUARD::QAR2(C)
      • S(a);N_GUARD::QAR2(C),XS(a)
      • P(c);SBLOCK::QAR1(C)
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