MESON Chess Problem Database

Problem Display
PID: 268690 (3K3N/3p4/2p1NR2/2B1kp2/4p2P/4p3/4B3/8 w - - 0 1)

Elder, AH

Sunday Referee, 1930

(First published on Sun Mar 9 1930)

3K3N/3p4/2p1NR2/2B1kp2/4p2P/4p3/4B3/8

#2

7 + 6

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Kxd7?
      • 1...Kd5
        • 2.Rxf5#
      • 1...Kxf6
        • 2.Bd4#
      • 1...f4!
    • 1.Sd4?
      • threat
        • 2.Rxf5#
      • 1...Kf4
        • 2.Bd6#
      • 1...Kd5
        • 2.Rxf5#
      • 1...f4
        • 2.Rf5#
      • 1...Kxf6!
    • 1.Bd4+?
      • 1...Kd6
        • 2.Sf4#
        • 2.Sc7#
      • 1...Kd5!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Rxf5#
      • 1...Kf4
        • 2.Bd6#
      • 1...Kd5
        • 2.Rxf5#
      • 1...Kxf6
        • 2.Bd4#
      • 1...f4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(F);P-FLIGHT,XP(f)
      • Vars
        • K(c);N_GUARD,P-FLIGHT::R(E),XP(d)
        • K(c);N_GUARD,S_FLIGHT,XR(E)::B(C)
      • Refutation
        • P(d);
    • Try
      • S(D);
      • Threat
        • R1(E),XP(d)
      • Vars
        • K(c);N_GUARD,P_SPINP(d),S_FLIGHT::B(C)
        • K(c);P-FLIGHT::R(E),XP(d)
        • P(d);::R1(E)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
    • Try
      • B(C);CHECK
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • R1(E),XP(d)
    • Vars
      • K(c);N_GUARD,P_SPINP(d),S_FLIGHT::B(C)
      • K(c);P-FLIGHT::R(E),XP(d)
      • K(c);N_GUARD,S_FLIGHT,XR(E)::B(C)
      • P(d);::R1(E)
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