MESON Chess Problem Database

Problem Display
PID: 178749 (8/8/7N/8/6p1/6R1/5k1n/3K2R1 w - - 0 1)

Holm, Karl Helmer

Springaren, 1956

8/8/7N/8/6p1/6R1/5k1n/3K2R1

#2

4 + 3

6490 yacpdb 2018
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Sxg4#
      • 2.R1g2#
    • 1...Sf3
      • 2.Sxg4#
  • Tries
    • 1.Sf7?
      • 1...Sf1
        • 2.R1g2#
      • 1...Sf3!
    • 1.Sg8?
      • 1...Sf1
        • 2.R1g2#
      • 1...Sf3!
  • Keys
    • 1.Sf5!
      • 1...Sf1
        • 2.R1g2#
      • 1...Sf3
        • 2.R3g2#

Anticipated by 203227(1924)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::S(D),XP(c)
  • Tries
    • Try
      • S(D);
      • Vars
        • S(b);SBLOCK::R1(B)
      • Refutation
        • S(b);
    • Try
      • S(D);
      • Vars
        • S(b);SBLOCK::R1(B)
      • Refutation
        • S(b);
  • Actual
    • S(D);
    • Vars
      • S(b);SBLOCK::R1(B)
      • S(b);SBLOCK::R1(C)
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