MESON Chess Problem Database

Problem Display
PID: 184363 (6B1/8/2N5/8/1b1Nk3/6R1/n4RK1/8 w - - 0 1)

de Szasz, L

The Observer, 1928

(First published on Sun May 6 1928)

6B1/8/2N5/8/1b1Nk3/6R1/n4RK1/8

#2

6 + 3

5454 Near Snap 2018
15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3?
      • 1...Bd2
        • 2.Sxd2#
        • 2.Sc5#
      • 1...Be1
        • 2.Sc5#
      • 1...Ba3
        • 2.Sd2#
      • 1...Bc3
        • 2.Sc5#
      • 1...Ba5
        • 2.Sc5#
      • 1...Bc5
        • 2.Sd2#
        • 2.Sxc5#
      • 1...Bd6
        • 2.Sd2#
      • 1...Be7
        • 2.Sd2#
      • 1...Bf8
        • 2.Sd2#
      • 1...Sc3
        • 2.Sd2#
      • 1...Sc1!
    • 1.Sf5?
      • threat
        • 2.Re3#
      • 1...Bd2
        • 2.Sd6#
      • 1...Bc5!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sg5#
      • 1...Kd3
        • 2.Sg5#
      • 1...Ke3
        • 2.Sd2#
        • 2.Sg5#
      • 1...Kf4
        • 2.Sd2#
        • 2.Sg5#
      • 1...Kf5
        • 2.Sd2#
      • 1...Bd2
        • 2.Sxd2#
      • 1...Be7
        • 2.Sd2#

Anticipated by 157839(1907)

This anticipates 96813(1945)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • B(b);N_GUARD::S(D)
        • S(a);S_CUTB(b)::S(D)
      • Refutation
        • S(a);
    • Try
      • S(D);
      • Threat
        • R1(C)
      • Vars
        • B(b);N_GUARD::S(D)
      • Refutation
        • B(b);
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(c);S_FLIGHT::R(C)+S(D)
      • K(c);S_FLIGHT::R(A)+S(D)
      • B(b);N_GUARD::S(D),XB(b)
      • B(b);N_GUARD::S(D)
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