MESON Chess Problem Database

Problem Display
PID: 247934 (6B1/7K/1Q3B2/8/4kp2/8/2R5/8 w - - 0 1)

Zarubin, Eduard

Uralski Problemist, 2006

6B1/7K/1Q3B2/8/4kp2/8/2R5/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qe6#
  • Tries
    • 1.Be6?
      • 1...Kd3
        • 2.Bf5#
      • 1...f3
        • 2.Qd4#
      • 1...Kf3!
    • 1.Re2+?
      • 1...Kd3
        • 2.Qb5#
        • 2.Qa6#
      • 1...Kf5
        • 2.Qe6#
      • 1...Kf3!
    • 1.Rf2?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf5
        • 2.Qe6#
      • 1...f3!
    • 1.Rg2?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf3
        • 2.Bd5#
      • 1...Kf5
        • 2.Qe6#
      • 1...f3!
    • 1.Rc3?
      • threat
        • 2.Qb1#
        • 2.Qe6#
      • 1...Kf5
        • 2.Qe6#
      • 1...f3!
    • 1.Qb3?
      • 1...Kf5
        • 2.Qe6#
      • 1...f3!
    • 1.Qe6+?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kf3!
  • Keys
    • 1.Bd5+!
      • 1...Kd3
        • 2.Qb3#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(B)
  • Tries
    • Try
      • B(E);
      • Vars
        • K(a);S_FLIGHT::B(E)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);P_SPINP(b),S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::B(E)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(E);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR2(B)
      • K(a);S_FLIGHT,XB(E)::QAB1(B)
      • K(a);S_FLIGHT::QAB1(B)
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