MESON Chess Problem Database

Problem Display
PID: 163635 (8/4K3/8/1RNk1B2/8/8/4p3/Q7 w - - 0 1)

Saks, Oleg Pavlovich

Uralski Problemist, 1994

8/4K3/8/1RNk1B2/8/8/4p3/Q7

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Se4+?
      • 1...Kc4
        • 2.Sd6#
      • 1...Kc6!
    • 1.Sa6+?
      • 1...Kc6
        • 2.Bd7#
      • 1...Kc4!
    • 1.Se6+?
      • 1...Kc6
        • 2.Qa6#
      • 1...Kc4!
    • 1.Sb7+?
      • 1...Kc4
        • 2.Sd6#
      • 1...Kc6!
    • 1.Qc3?
      • threat
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Se4#
        • 2.Sa6#
        • 2.Se6#
        • 2.Sb7#
        • 2.Sd7#
        • 2.Be4#
      • 1...e1Q+
        • 2.Se4#
        • 2.Se6#
      • 1...e1R+
        • 2.Se4#
        • 2.Se6#
      • 1...Kc6!
    • 1.Qd4+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Kxd4!
    • 1.Qc1?
      • threat
        • 2.Sb3#
        • 2.Se6#
      • 1...e1Q+
        • 2.Se6#
      • 1...e1R+
        • 2.Se6#
      • 1...Kd4
        • 2.Sb3#
        • 2.Se6#
      • 1...Ke5
        • 2.Sb3#
        • 2.Se6#
      • 1...Kc6!
  • Keys
    • 1.Qe5+!
      • 1...Kc4
        • 2.Bd3#
      • 1...Kxe5
        • 2.Se6#
      • 1...Kc6
        • 2.Bd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT::B(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(9)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);CHECK::R(B)+S(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);CHECK
    • Vars
      • K(b);S_FLIGHT::B(D)
      • K(b);P-FLIGHT,XQ(A)::R(B)+S(C)
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