MESON Chess Problem Database

Problem Display
PID: 35611 (8/2p2K2/3k4/B7/2Q5/5N2/8/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 1990

8/2p2K2/3k4/B7/2Q5/5N2/8/8

#2

4 + 2

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.Qxc7#
    • 1...c5
      • 2.Qe6#
    • 1...c6
      • 2.Qd4#
  • Tries
    • 1.Kf6?
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Qd4#
      • 1...Kd7!
    • 1.Se1?
      • 1...Kd7
        • 2.Qxc7#
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Qd4#
      • 1...Ke5!
    • 1.Sg1?
      • 1...Kd7
        • 2.Qxc7#
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Qd4#
      • 1...Ke5!
    • 1.Sd2?
      • 1...Kd7
        • 2.Qxc7#
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Qd4#
      • 1...Ke5!
    • 1.Sh2?
      • 1...Kd7
        • 2.Qxc7#
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Qd4#
      • 1...Ke5!
    • 1.Se5?
      • threat
        • 2.Bxc7#
        • 2.Qd4#
      • 1...c6
        • 2.Qd4#
      • 1...c5
        • 2.Qe6#
      • 1...Kxe5!
    • 1.Sg5?
      • 1...Kd7
        • 2.Qxc7#
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Qd4#
      • 1...Ke5!
    • 1.Bb6?
      • threat
        • 2.Qe6#
      • 1...Kd7
        • 2.Qxc7#
      • 1...cxb6!
    • 1.Qc5+?
      • 1...Kd7
        • 2.Qxc7#
      • 1...Kxc5!
  • Keys
    • 1.Sh4!
      • 1...Ke5
        • 2.Bxc7#
      • 1...Kd7
        • 2.Qxc7#
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Qd4#

Anticipated by 234509(1962)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(B),XP(b)
    • P(b);SBLOCK::QAR1(B)
    • P(b);SBLOCK::QAR2(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR2(B)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(A)
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
      • Refutation
        • P(b);XB(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • S(A);
    • Vars
      • K(a);S_FLIGHT::B(C),XP(b)
      • K(a);P-FLIGHT::QAR1(B),XP(b)
      • P(b);SBLOCK::QAR1(B)
      • P(b);SBLOCK::QAR2(B)
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