MESON Chess Problem Database

Problem Display
PID: 61621 (r3k3/3R2p1/2PP2P1/8/BR4p1/6K1/8/8 w q - 0 1)

Neale, Harry R

Chess, 1943

r3k3/3R2p1/2PP2P1/8/BR4p1/6K1/8/8

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4
      • 2.Rb8#
    • 1...Ra5
      • 2.Rb8#
    • 1...Ra6
      • 2.Rb8#
    • 1...Ra7
      • 2.Rb8#
    • 1...Rb8
      • 2.Rxb8#
  • Tries
    • 1.Rxg7?
      • threat
        • 2.Rg8#
      • 1...Kd8
        • 2.Rg8#
      • 1...0-0-0
        • 2.Rc7#
      • 1...Kf8!
    • 1.c7?
      • threat
        • 2.Rd8#
      • 1...Rd8
        • 2.Rxd8#
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Kf8!
  • Keys
    • 1.Rf7!
      • 1...Kd8
        • 2.Rf8#
      • 1...0-0-0
        • 2.Rc7#
      • 1...Rxa4
        • 2.Rb8#
      • 1...Rc8
        • 2.c7#
      • 1...Ra5
        • 2.Rb8#
      • 1...Ra6
        • 2.Rb8#
      • 1...Ra7
        • 2.Rb8#
      • 1...Rb8
        • 2.Rxb8#
      • 1...Rd8
        • 2.Re4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD,XB(B)::R(C)
    • R(c);N_GUARD::R(C)
    • R(c);N_GUARD::R(C),XR(c)
  • Tries
    • Try
      • R(G);XP(b)
      • Threat
        • R(G)
      • Vars
        • K(d);P-FLIGHT::R(G)
        • K(d);0-0-0,OGATEB::R1(G)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • P(D);
      • Threat
        • B(B)+R(G),DCHECK
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • R(G);
    • Vars
      • K(d);P-FLIGHT::R(G)
      • K(d);0-0-0,OGATEB::R1(G)
      • R(c);N_GUARD,XB(B)::R(C)
      • R(c);N_GUARD::B(B)+P(D)
      • R(c);N_GUARD::R(C)
      • R(c);N_GUARD::R(C),XR(c)
      • R(c);SBLOCK::R(C)
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