MESON Chess Problem Database

Problem Display
PID: 224464 (4B3/8/4R3/2pk2K1/2Np4/P1p5/2P5/3N4 w - - 0 1)

Block, AB

Nashville Daily American, 1887

(First published on Sun Sep 4 1887)

4B3/8/4R3/2pk2K1/2Np4/P1p5/2P5/3N4

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Bf7?
      • threat
        • 2.Sb6#
      • 1...Kxc4
        • 2.Rb6#
      • 1...d3!
    • 1.Rb6?
      • 1...Kxc4
        • 2.Bf7#
      • 1...Ke4
        • 2.Bc6#
      • 1...d3!
    • 1.Rd6+?
      • 1...Ke4
        • 2.Bc6#
      • 1...Kxc4!
  • Keys
    • 1.Re4!
      • 1...Kxc4
        • 2.Se3#
      • 1...Kxe4
        • 2.Bc6#
      • 1...d3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(G);
      • Threat
        • S(D)
      • Vars
        • K(d);S_FLIGHT,XS(D)::B(G)+R(F)
      • Refutation
        • P(b);
    • Try
      • R(F);
      • Vars
        • K(d);S_FLIGHT,XS(D)::B(G)
        • K(d);S_FLIGHT::B(G)
      • Refutation
        • P(b);
    • Try
      • R(F);CHECK
      • Vars
        • K(d);S_FLIGHT::B(G)
      • Refutation
        • K(d);S_FLIGHT,XS(D)
  • Actual
    • R(F);
    • Vars
      • K(d);P_SPINP(b),S_FLIGHT,XS(D)::S(A)
      • K(d);S_FLIGHT,XR(F)::B(G)
      • P(b);N_GUARD::S(A),XP(a)
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