MESON Chess Problem Database

Problem Display
PID: 77280 (8/8/3R4/8/b3N3/8/5R2/K1k3N1 w - - 0 1)

Albrecht, Hermann

Neue Leipziger Zeitung, 1938

(First published on Sun Jul 31 1938)

8/8/3R4/8/b3N3/8/5R2/K1k3N1

#2

5 + 2

5454 Near Snap 2008
15148 Sadier Collection 2014
15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Se2#
  • Tries
    • 1.Rf1+?
      • 1...Bd1
        • 2.Rc6#
      • 1...Kc2!
    • 1.Rc2+?
      • 1...Bxc2
        • 2.Se2#
      • 1...Kxc2!
    • 1.Rc6+?
      • 1...Kd1
        • 2.Rf1#
      • 1...Bc2
        • 2.Rf1#
      • 1...Bxc6!
  • Keys
    • 1.Sc5!
      • 1...Bd1
        • 2.Sd3#
      • 1...Bc2
        • 2.Se2#
      • 1...Bb3
        • 2.Sxb3#
      • 1...Bb5
        • 2.Sb3#
      • 1...Bc6
        • 2.Sb3#
      • 1...Bd7
        • 2.Sb3#
      • 1...Be8
        • 2.Sb3#

Anticipated by 21573(1919)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::S(B)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(b);P_SPINB(b)::R(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • B(b);SBLOCK,XR(C)::S(B)
      • Refutation
        • K(a);P-FLIGHT,XR(C)
    • Try
      • R(E);CHECK
      • Vars
        • K(a);P-FLIGHT::R(C)
        • B(b);P_SPINB(b)::R(C)
      • Refutation
        • B(b);XR(E)
  • Actual
    • S(D);
    • Vars
      • B(b);SBLOCK::S(D)
      • B(b);SBLOCK::S(B)
      • B(b);N_GUARD::S(D),XB(b)
      • B(b);N_GUARD::S(D)
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