MESON Chess Problem Database

Problem Display
PID: 269549 (2n5/1p6/k1N5/r4B1K/1Rn5/R5Q1/8/8 w - - 0 1)

Alexander, Frederick Forrest Lawrie

British Chess Magazine, 1934

2n5/1p6/k1N5/r4B1K/1Rn5/R5Q1/8/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Rxa5#
    • 1...Sd2
      • 2.Rxa5#
    • 1...Se3
      • 2.Rxa5#
    • 1...Se5
      • 2.Rxa5#
    • 1...S4b6
      • 2.Rxa5#
    • 1...S4d6
      • 2.Rxa5#
    • 1...Sa7
      • 2.Sb8#
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qxb7#
      • 1...bxc6
        • 2.Qb7#
      • 1...S8d6
        • 2.Qa7#
        • 2.Qa8#
      • 1...S4b6
        • 2.Rxa5#
      • 1...S4d6
        • 2.Rxa5#
      • 1...S8b6
        • 2.Qa7#
      • 1...b5
        • 2.Bxc8#
        • 2.Qxb5#
      • 1...b6
        • 2.Qxc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::R1(A),XR(b)
    • S(a);N_GUARD,N_PINB(D)::R1(A),XR(b)
    • S(e);SBLOCK::S(F)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XP(d)
    • Vars
      • P(d);XS(F)::QAB1(B)
      • S(a);N_GUARD::R1(A),XR(b)
      • S(e);N_GUARD::QAR1(B)
      • P(d);::QAB(B),XS(e)
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