MESON Chess Problem Database

Problem Display
PID: 234639 (8/3K4/5B2/5k2/3bp3/1Q6/6R1/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2005

8/3K4/5B2/5k2/3bp3/1Q6/6R1/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qe6#
  • Tries
    • 1.Bxd4?
      • threat
        • 2.Qf7#
      • 1...Kf4
        • 2.Qf7#
      • 1...e3!
    • 1.Rg4?
      • threat
        • 2.Qe6#
      • 1...Kxf6
        • 2.Qe6#
      • 1...Kxg4!
    • 1.Rg5+?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kxf6!
    • 1.Qd5+?
      • 1...Kxf6
        • 2.Qe6#
      • 1...Be5
        • 2.Qxe5#
      • 1...Kf4!
    • 1.Qh3+?
      • 1...Kxf6
        • 2.Qe6#
      • 1...Kf4!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qg5#
      • 1...Kxf6
        • 2.Qf4#
      • 1...Bxf6
        • 2.Rf2#
      • 1...e3
        • 2.Qf3#
      • 1...Be3
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,XB(C)::QAR1(B)
  • Tries
    • Try
      • B(C);XB(a)
      • Threat
        • QAR2(B)
      • Vars
        • K(c);P-FLIGHT::QAR(B)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Threat
        • QAB1(B)
      • Vars
        • K(c);P-FLIGHT,XB(C)::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT,XR(A)
    • Try
      • R(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT,XB(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT,XB(C)::QAR1(B)
        • B(a);N_GUARD,P_SPINB(a)::QAR1(B),XB(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT,XB(C)::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);P-FLIGHT,XB(C)::QAR2(B)
      • B(a);N_GUARD,SBLOCK,XB(C)::R(A)
      • P(b);N_GUARD::QAR2(B)
      • B(a);N_GUARD::QAR1(B)
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