MESON Chess Problem Database

Problem Display
PID: 139898 (7B/8/6p1/2K1p1rP/1NP5/n7/B3R3/kr5R w - - 0 1)

Neale, Harry R

The Problemist, 1938

7B/8/6p1/2K1p1rP/1NP5/n7/B3R3/kr5R

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Bxe5#
    • 1...Sc2
      • 2.Rxb1#
    • 1...Sxc4
      • 2.Rxb1#
    • 1...Sb5
      • 2.Rxb1#
  • Keys
    • 1.Rxe5!
      • threat
        • 2.Rf5#
        • 2.Rxg5#
      • 1...Rxe5+
        • 2.Bxe5#
      • 1...Kb2
        • 2.Rf5#
        • 2.Rxg5#
      • 1...Rxh5
        • 2.Rexh5#
      • 1...Sxc4
        • 2.Rxb1#
      • 1...gxh5
        • 2.Rxg5#
      • 1...Rgg1
        • 2.Re1#
      • 1...Rg2
        • 2.Re2#
      • 1...Rg3
        • 2.Re3#
      • 1...Rg4
        • 2.Re4#
      • 1...Rf5
        • 2.Rxf5#
      • 1...Sc2
        • 2.Rxb1#
      • 1...Sb5
        • 2.Rxb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD::B(H),XP(d)
    • S(c);N_GUARD::R1(A),XR(b)
    • S(c);N_GUARD,XP(E)::R1(A),XR(b)
  • Actual
    • R(C);P_SPINR(C),XP(d)
    • Threat
      • DUALS(2)
    • Vars
      • R(e);CHECK,OGATE,XR(C)::B(H),XR(e)
      • R(e);XP(G)::B(H)+R(C),XR(e)
      • S(c);N_GUARD,XP(E)::R1(A),XR(b)
      • P(f);XP(G)::B(H)+R(C),XR(e)
      • R(e);N_PINR(C),N_SPINR(b)::B(H)+R(C)
      • R(e);N_PINR(C)::B(H)+R(C)
      • R(e);::B(H)+R(C),XR(e)
      • S(c);N_GUARD::R1(A),XR(b)
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