MESON Chess Problem Database

Problem Display
PID: 265482 (8/4Q3/8/3kpR2/2p1R3/8/4K3/8 w - - 0 1)

Eltsov, Aleksandr Ivanovich

Zadachi i Etyudi, 2010

8/4Q3/8/3kpR2/2p1R3/8/4K3/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qxe5#
  • Tries
    • 1.Rd4+?
      • 1...Kxd4
        • 2.Qxe5#
      • 1...Kc6!
    • 1.Rexe5+?
      • 1...Kc6
        • 2.Re6#
        • 2.Rf6#
      • 1...Kd4!
    • 1.Qd6+?
      • 1...Kxe4
        • 2.Qxe5#
      • 1...Kxd6!
    • 1.Qf6?
      • threat
        • 2.Rfxe5#
      • 1...Kxe4
        • 2.Qxe5#
      • 1...Kc5!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Rfxe5#
      • 1...Kxe4
        • 2.Qxe5#
      • 1...Ke6
        • 2.Rexe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,S_FLIGHT,XR(B)::QAR1(D),XP(c)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINP(c),P-FLIGHT,XR(B)::QAB1(D),XP(c)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • R(B);CHECK,XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINP(c),S_FLIGHT,XR(B)::QAR1(D),XP(c)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Threat
        • R1(C),XP(c)
      • Vars
        • K(b);N_GUARD,N_SPINP(c),S_FLIGHT,XR(B)::QAR1(D),XP(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);
    • Threat
      • R1(C),XP(c)
    • Vars
      • K(b);N_GUARD,N_SPINP(c),S_FLIGHT,XR(B)::QAR1(D),XP(c)
      • K(b);N_GUARD,S_FLIGHT::R1(B),XP(c)
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