MESON Chess Problem Database

Problem Display
PID: 172134 (4Q3/8/2pPpP2/2R4P/R2pkPp1/P5Pb/5P2/4K3 w - - 0 1)

Apro, Laszlo

Arbejder-Skak, 1955

4Q3/8/2pPpP2/2R4P/R2pkPp1/P5Pb/5P2/4K3

#2

11 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qg6#
    • 1...Kf3
      • 2.Qxc6#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Re5#
        • 2.Qxc6#
        • 2.Qg6#
        • 2.Qxe6#
      • 1...e5
        • 2.Rxe5#
        • 2.Qg6#
        • 2.Qxe5#
      • 1...Bf1+!
    • 1.Rxd4+?
      • 1...Kf3
        • 2.Qxc6#
      • 1...Kxd4!
    • 1.Re5+?
      • 1...Kf3
        • 2.Qxc6#
      • 1...Kd3!
    • 1.Qxe6+?
      • 1...Kd3
        • 2.Qf5#
        • 2.Qe2#
      • 1...Kf3!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Qxe6#
      • 1...Kd5
        • 2.Qxc6#
      • 1...Kf5
        • 2.Qg6#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(c);N_SPINP(b),S_FLIGHT::QAB(K)
    • K(c);N_SPINP(b),S_FLIGHT::QAB(K),XP(e)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(4)
      • Refutation
        • B(a);CHECK
    • Try
      • R(E);CHECK,P_PINP(f),XP(b)
      • Vars
        • K(c);N_SPINP(f),S_FLIGHT::QAB(K),XP(e)
      • Refutation
        • K(c);N_SPINP(f),P-FLIGHT,XR(E)
    • Try
      • R(G);CHECK
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAB(K),XP(e)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • Q(K);CHECK,XP(f)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
  • Actual
    • R(G);
    • Threat
      • QAR2(K),XP(f)
    • Vars
      • K(c);N_SPINP(b),S_FLIGHT::QAB1(K),XP(e)
      • K(c);N_SPINP(b),S_FLIGHT::QAB1(K)
      • P(f);OGATE::QAR1(K),XP(f)
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