MESON Chess Problem Database

Problem Display
PID: 259226 (8/5K2/5N2/3R4/2kp4/8/8/3BQ3 w - - 0 1)

Pilchenko, Viacheslav Karlovich

64 Shakhmatnoe obozrenie, 2022

8/5K2/5N2/3R4/2kp4/8/8/3BQ3

#2

5 + 2

3713 Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sg4?
      • 1...Kd3
        • 2.Se5#
      • 1...d3
        • 2.Se3#
      • 1...Kxd5!
    • 1.Rc5+?
      • 1...Kd3
        • 2.Bc2#
        • 2.Qe2#
      • 1...Kxc5!
    • 1.Qf2?
      • threat
        • 2.Qxd4#
      • 1...Kc3
        • 2.Qxd4#
      • 1...Kd3
        • 2.Qxd4#
      • 1...d3
        • 2.Qd4#
        • 2.Qc5#
      • 1...Kb4!
    • 1.Qg3?
      • threat
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...d3!
    • 1.Qb4+?
      • 1...Kd3
        • 2.Qxd4#
      • 1...Kxb4!
    • 1.Qh4?
      • threat
        • 2.Qxd4#
      • 1...Kc3
        • 2.Qxd4#
      • 1...Kd3
        • 2.Qxd4#
      • 1...Kb4!
    • 1.Qa5?
      • 1...d3
        • 2.Qc5#
      • 1...Kd3!
    • 1.Qg1?
      • threat
        • 2.Qxd4#
      • 1...Kc3
        • 2.Qxd4#
      • 1...Kd3
        • 2.Qxd4#
      • 1...d3
        • 2.Qd4#
        • 2.Qc5#
      • 1...Kb4!
    • 1.Qe3?
      • threat
        • 2.Qxd4#
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...d3
        • 2.Qd4#
        • 2.Qc5#
      • 1...dxe3!
    • 1.Qe4?
      • threat
        • 2.Qxd4#
      • 1...Kc3
        • 2.Qxd4#
      • 1...Kb4!
    • 1.Qe5?
      • threat
        • 2.Qxd4#
      • 1...Kc3
        • 2.Qxd4#
      • 1...Kd3
        • 2.Qxd4#
      • 1...d3
        • 2.Qd4#
      • 1...Kb4!
  • Keys
    • 1.Sd7!
      • 1...Kd3
        • 2.Se5#
      • 1...Kxd5
        • 2.Qe6#
      • 1...d3
        • 2.Sb6#

Anticipated by 46750(1995)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::S(D)
        • P(b);N_GUARD::S(D)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XR(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAB1(B),XP(b)
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAB1(B),XP(b)
        • K(a);S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(b);::QAR1(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAB1(B),XP(b)
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAB1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAB1(B),XP(b)
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
        • P(b);::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::S(D)
      • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • P(b);::S(D)
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