MESON Chess Problem Database

Problem Display
PID: 241811 (B7/QP6/2Rp4/3k1K2/8/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1929

B7/QP6/2Rp4/3k1K2/8/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.b8Q#
      • 2.b8R#
  • Tries
    • 1.Kf4?
      • 1...Kxc6
        • 2.b8Q#
        • 2.b8R#
      • 1...Ke6!
    • 1.Kf6?
      • 1...Kxc6
        • 2.b8Q#
        • 2.b8R#
      • 1...Ke4!
    • 1.Rxd6+?
      • 1...Kxd6
        • 2.b8Q#
        • 2.b8B#
      • 1...Kc4!
    • 1.Qa2+?
      • 1...Kd4
        • 2.Qd2#
      • 1...Kxc6!
  • Keys
    • 1.Qa5+!
      • 1...Kd4
        • 2.Qd2#
      • 1...Kxc6
        • 2.b8S#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XR(B)::P=Q
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT,XR(B)::P=Q
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT,XR(B)::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT,XR(B)::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • Q(C);CHECK
    • Vars
      • K(a);P-FLIGHT::QAR2(C)
      • K(a);S_FLIGHT,XR(B)::P=S
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