MESON Chess Problem Database

Problem Display
PID: 178760 (4bBNk/6R1/8/7p/7K/8/8/8 w - - 0 1)

Jonsson, Christer

Springaren, 1984

4bBNk/6R1/8/7p/7K/8/8/8

#2

4 + 3

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sh6?
      • 1...Ba4
        • 2.Sf7#
      • 1...Bb5
        • 2.Sf7#
      • 1...Bc6
        • 2.Sf7#
      • 1...Bd7
        • 2.Sf7#
      • 1...Bf7
        • 2.Sxf7#
      • 1...Bg6!
    • 1.Se7?
      • 1...Ba4
        • 2.Sg6#
      • 1...Bb5
        • 2.Sg6#
      • 1...Bc6
        • 2.Sg6#
      • 1...Bg6
        • 2.Sxg6#
      • 1...Bd7
        • 2.Sg6#
      • 1...Bf7!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rh7#
        • 2.Rg8#
      • 1...Bg6
        • 2.Rg8#
      • 1...Bf7
        • 2.Rh7#

This anticipates 150007(2009)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • B(b);N_GUARD::S(D)
        • B(b);N_GUARD::S(D),XB(b)
      • Refutation
        • B(b);
    • Try
      • S(D);
      • Vars
        • B(b);N_GUARD::S(D)
        • B(b);N_GUARD::S(D),XB(b)
      • Refutation
        • B(b);
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • B(b);::R1(B)
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