MESON Chess Problem Database

Problem Display
PID: 174720 (K2Bk2r/1R4b1/1Q6/8/8/8/8/8 w k - 0 1)

Ouellet, Charles

Die Schwalbe, 2017

K2Bk2r/1R4b1/1Q6/8/8/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rf8
      • 2.Re7#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Qe7#
      • 1...Kf8
        • 2.Qf7#
      • 1...0-0
        • 2.Qxg7#
      • 1...Bf8
        • 2.Qd7#
      • 1...Bf6!
    • 1.Qb5+?
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kf8!
    • 1.Qc6+?
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kf8!
    • 1.Qd6?
      • threat
        • 2.Qe7#
      • 1...Bf8
        • 2.Qd7#
      • 1...Bf6!
    • 1.Qg6+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Kxd8!
  • Keys
    • 1.Qe6+!
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(c);SBLOCK::R1(B)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);0-0,OGATEB,P_PINB(D)::QAR1(A),XB(a)
        • B(a);SBLOCK::QAB1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(D)::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(D)::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);SBLOCK::QAB1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XB(D)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(b);P-FLIGHT,XB(D)::QAR1(A)
      • K(b);P-FLIGHT::QAR1(A)
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