MESON Chess Problem Database

Problem Display
PID: 234665 (8/6b1/8/2Q2K1k/4B3/7p/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2008

8/6b1/8/2Q2K1k/4B3/7p/8/8

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kf4+?
      • 1...Kh4
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg5#
      • 1...Be5+!
    • 1.Bf3+?
      • 1...Kh4
        • 2.Qf2#
      • 1...Kh6!
    • 1.Qg1?
      • threat
        • 2.Qg5#
      • 1...Kh4
        • 2.Qg4#
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg6#
      • 1...Bh6
        • 2.Qg4#
      • 1...Bf6!
    • 1.Qe3?
      • threat
        • 2.Qg5#
        • 2.Qxh3#
      • 1...Kh4
        • 2.Qg5#
      • 1...Bh6
        • 2.Qxh3#
      • 1...h2
        • 2.Qg5#
        • 2.Qh3#
      • 1...Bf6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qg5#
      • 1...Kh6
        • 2.Qh4#
      • 1...Bf6
        • 2.Qh7#
      • 1...Bh6
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);CHECK,P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • B(c);CHECK,P_SPINB(c)
    • Try
      • B(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • B(c);SBLOCK::QAB1(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
        • B(c);SBLOCK::QAR2(B),XP(a)
      • Refutation
        • B(c);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT::QAR2(B)
      • B(c);OGATE::QAR2(B)
      • B(c);SBLOCK::B(A)
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