MESON Chess Problem Database

Problem Display
PID: 234730 (8/8/8/8/2K1k3/2p1p1PB/Q7/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2013

8/8/8/8/2K1k3/2p1p1PB/Q7/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qg2#
    • 1...e2
      • 2.Qxe2#
  • Tries
    • 1.Kxc3?
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke5
        • 2.Qe6#
      • 1...e2!
    • 1.Qc2+?
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke5!
    • 1.Qf2?
      • threat
        • 2.Qf4#
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf4#
      • 1...e2
        • 2.Qxe2#
        • 2.Qf4#
      • 1...exf2!
  • Keys
    • 1.Kc5!
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Bf5#
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke5
        • 2.Qe6#
      • 1...e2
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB1(A)
    • P(b);OGATEB::QAR2(A),XP(b)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(a)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAB1(A)
    • Vars
      • K(c);S_FLIGHT::B(C)
      • K(c);S_FLIGHT::QAB1(A)
      • K(c);P-FLIGHT::QAR1(A)
      • P(b);OGATEB::QAR2(A),XP(b)
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