MESON Chess Problem Database

Problem Display
PID: 101357 (8/1n6/N1n1R1N1/3k2p1/8/2PP3B/5K2/8 w - - 0 1)

Janet, Frank

Good Companions, 1918

8/1n6/N1n1R1N1/3k2p1/8/2PP3B/5K2/8

#2

7 + 4

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Se7#
    • 1...Sd4
      • 2.Se7#
      • 2.c4#
    • 1...Sca5
      • 2.Se7#
    • 1...Se5
      • 2.Se7#
    • 1...Sa7
      • 2.Se7#
    • 1...Se7
      • 2.Sxe7#
    • 1...Sb8
      • 2.Se7#
    • 1...Scd8
      • 2.Se7#
    • 1...Sc5
      • 2.Sc7#
    • 1...g4
      • 2.Sf4#
  • Tries
    • 1.Rxc6?
      • threat
        • 2.Sb4#
        • 2.Bg2#
      • 1...Sc5
        • 2.Sb4#
      • 1...Sd6
        • 2.Sb4#
        • 2.Rc5#
      • 1...Kxc6!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Bg2#
      • 1...Sd4
        • 2.c4#
      • 1...Se5
        • 2.Se7#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sd6
        • 2.Be6#

Anticipated by 57816(0000)

This anticipates 718(1942)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • S(c);N_GUARD::S(G)
    • S(c);N_GUARD::S(G),XS(c)
    • S(d);SBLOCK::S(E)
    • P(b);N_GUARD::S(G)
  • Tries
    • Try
      • R(F);XS(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::S(E)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
  • Actual
    • R(F);
    • Threat
      • B(D)
    • Vars
      • S(c);SBLOCK::P(B)
      • S(c);N_GUARD,SBLOCK::S(G)
      • S(d);SBLOCK::S(E)
      • S(d);SBLOCK::B(D)
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