MESON Chess Problem Database

Problem Display
PID: 239240 (8/8/8/8/K2p3Q/2knR3/4R3/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

64 Shakhmatnoe obozrenie, 2017

8/8/8/8/K2p3Q/2knR3/4R3/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rxd3+?
      • 1...Kc4
        • 2.Qxd4#
      • 1...Kxd3!
    • 1.Qg5?
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Rc2#
      • 1...dxe3!
    • 1.Qd8?
      • threat
        • 2.Qc7#
        • 2.Qc8#
      • 1...Kc4
        • 2.Rc2#
      • 1...dxe3!
    • 1.Qh1?
      • threat
        • 2.Qc6#
        • 2.Qc1#
      • 1...Kc4
        • 2.Rc2#
      • 1...dxe3!
    • 1.Qe4?
      • threat
        • 2.Qxd3#
        • 2.Qc6#
      • 1...Kc4
        • 2.Rc2#
      • 1...dxe3!
    • 1.Qh5?
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Rc2#
      • 1...dxe3!
  • Keys
    • 1.Kb5!
      • 1...Kb3
        • 2.Rxd3#
      • 1...dxe3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK,XS(b)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c)::QAR1(D),XP(c)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • Q(D);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::R(A)
      • Refutation
        • P(c);N_SPINS(b),XR(B)
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::R(A)
      • Refutation
        • P(c);N_SPINS(b),XR(B)
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::R(A)
      • Refutation
        • P(c);N_SPINS(b),XR(B)
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT,P_SPINP(c)::R(A)
      • Refutation
        • P(c);N_SPINS(b),XR(B)
    • Try
      • Q(D);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::R(A)
      • Refutation
        • P(c);N_SPINS(b),XR(B)
  • Actual
    • K(C);S_FLIGHT
    • Vars
      • K(a);P-FLIGHT::R(B),XS(b)
      • P(c);N_SPINS(b),OGATE,XR(B)::QAR1(D)
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