MESON Chess Problem Database

Problem Display
PID: 21519 (b7/2b5/2pBn1N1/R2n2pR/7p/1N1Pk3/4P3/5K2 w - - 0 1)

Janet, Frank

Good Companions (May), 1919

b7/2b5/2pBn1N1/R2n2pR/7p/1N1Pk3/4P3/5K2

#2

8 + 8

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Re5#
    • 1...Sdf4
      • 2.Re5#
    • 1...Sb6
      • 2.Re5#
    • 1...Se7
      • 2.Re5#
    • 1...Sef4
      • 2.Bc5#
    • 1...Sc5
      • 2.Bxc5#
    • 1...Sg7
      • 2.Bc5#
    • 1...Sd8
      • 2.Bc5#
    • 1...Sf8
      • 2.Bc5#
    • 1...h3
      • 2.Rxh3#
    • 1...g4
      • 2.Re5#
  • Tries
    • 1.Sxh4?
      • threat
        • 2.Sg2#
        • 2.Sf5#
      • 1...Bxd6
        • 2.Sg2#
      • 1...Sdf4
        • 2.Sf5#
        • 2.Re5#
      • 1...Se7
        • 2.Sg2#
      • 1...Sd4
        • 2.Sg2#
      • 1...Sef4
        • 2.Sf5#
        • 2.Bc5#
      • 1...Sg7
        • 2.Sg2#
      • 1...gxh4!
    • 1.Bc5+?
      • 1...Sd4
        • 2.Bxd4#
      • 1...Sxc5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sg2#
      • 1...Sdxf4
        • 2.Re5#
      • 1...Sexf4
        • 2.Bc5#
      • 1...gxf4
        • 2.Re5#
      • 1...h3
        • 2.Rxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • S(c);OGATE::R(E)
    • S(f);N_GUARD::B(G)
    • S(f);N_GUARD::B(G),XS(f)
    • P(b);OGATE::R(F),XP(b)
    • P(d);OGATE::R(F)
  • Tries
    • Try
      • S(H);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XB(G)::S(H)
        • S(c);::S(H)
        • S(f);::S(H)
      • Refutation
        • P(d);XS(H)
    • Try
      • B(G);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::B(G),XS(f)
      • Refutation
        • S(f);XB(G)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • S(c);OGATE,SBLOCK,XS(H)::R(E)
      • S(f);N_GUARD,SBLOCK,XS(H)::B(G)
      • P(d);OGATE,SBLOCK,XS(H)::R(F)
      • P(b);OGATE::R(F),XP(b)
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