MESON Chess Problem Database

Problem Display
PID: 234651 (5b2/8/3QN3/5K1k/8/8/6P1/4b3 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2007

5b2/8/3QN3/5K1k/8/8/6P1/4b3

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qh2#
    • 1...Bd2
      • 2.Qh2#
    • 1...Bc3
      • 2.Qh2#
    • 1...Bb4
      • 2.Qh2#
    • 1...Bh4
      • 2.Sf4#
    • 1...Ba5
      • 2.Qh2#
  • Tries
    • 1.Sg7+?
      • 1...Kh4
        • 2.Qh2#
        • 2.Qf4#
      • 1...Bxg7!
    • 1.Qd1+?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kh6!
    • 1.g4+?
      • 1...Kh4
        • 2.Qh2#
      • 1...Kh6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qg5#
      • 1...Bd2
        • 2.Qh2#
      • 1...Bh4
        • 2.g4#
      • 1...Bh6
        • 2.Qg4#
      • 1...Be7
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(b);P-FLIGHT::QAR2(C)
    • B(a);N_GUARD::QAR(C)
    • B(a);SBLOCK::S(D)
    • B(a);N_GUARD,SBLOCK::QAR(C)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • B(c);XS(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • B(a);N_GUARD::QAR(C)
      • B(a);SBLOCK::P(A)
      • B(c);SBLOCK::QAB1(C)
      • B(c);N_GUARD::S(D)
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