MESON Chess Problem Database

Problem Display
PID: 79839 (8/8/4K3/8/5k1B/4nP2/4R3/4N3 w - - 0 1)

Akerblom, Johan Axel

Sodra Delarnes Tidning, 1927

8/8/4K3/8/5k1B/4nP2/4R3/4N3

#2

5 + 2

5454 Near Snap 2010
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Re4#
    • 1...Sf1
      • 2.Re4#
    • 1...Sc2
      • 2.Re4#
    • 1...Sg2
      • 2.Re4#
    • 1...Sc4
      • 2.Re4#
    • 1...Sg4
      • 2.Re4#
    • 1...Sd5
      • 2.Re4#
    • 1...Sf5
      • 2.Re4#
  • Keys
    • 1.Rf2!
      • threat
        • 2.Sd3#
      • 1...Sd1
        • 2.Sg2#
      • 1...Sf1
        • 2.Sg2#
      • 1...Sc2
        • 2.Sg2#
      • 1...Sg2
        • 2.Sxg2#
      • 1...Sc4
        • 2.Sg2#
      • 1...Sg4
        • 2.Sg2#
      • 1...Sd5
        • 2.Sg2#
      • 1...Sf5
        • 2.Sg2#

This anticipates 81274(1951), 18230(1954)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 8
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::R1(B)
  • Actual
    • R(B);
    • Threat
      • S(A)
    • Vars
      • S(a);N_GUARD::S(A)
      • S(a);N_GUARD::S(A),XS(a)
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