MESON Chess Problem Database

Problem Display
PID: 267143 (4R3/2K5/2ppN3/4k1P1/2n3P1/b2R2n1/2N3B1/8 w - - 0 1)

Hall, A

Hall, R

The Problemist, 1955

4R3/2K5/2ppN3/4k1P1/2n3P1/b2R2n1/2N3B1/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Rd5#
  • Tries
    • 1.Scd4?
      • threat
        • 2.Sxc6#
      • 1...c5
        • 2.Sc6#
      • 1...Sa5!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Sf4#
      • 1...Ke4
        • 2.Re3#
      • 1...Kd5
        • 2.Rf5#
      • 1...Sf5
        • 2.Rxf5#
      • 1...d5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD::R1(C)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A),XP(e)
      • Vars
        • P(e);::S(A)
      • Refutation
        • S(c);
  • Actual
    • R(C);
    • Threat
      • R(H)+S(F)
    • Vars
      • K(d);P-FLIGHT::B(B)+R(C),DCHECK
      • S(b);N_GUARD::R1(C),XS(b)
      • P(f);SBLOCK::R(H)+S(F)
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