MESON Chess Problem Database

Problem Display
PID: 108030 (2R1N3/K5n1/5p2/1p1p1P2/3k2N1/P1pP4/n1P4B/br6 w - - 0 1)

Elson, Jacob

4. American Chess Congress, 1876

2R1N3/K5n1/5p2/1p1p1P2/3k2N1/P1pP4/n1P4B/br6

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Bxg1#
    • 1...Rb2
      • 2.Bg1#
    • 1...Rb3
      • 2.Bg1#
    • 1...Rb4
      • 2.Bg1#
    • 1...Sc1
      • 2.Bg1#
  • Tries
    • 1.Bc7?
      • threat
        • 2.Bb6#
      • 1...Kc5
        • 2.Be5#
        • 2.Bb6#
      • 1...Se6!
  • Keys
    • 1.Sc7!
      • 1...Kc5
        • 2.Se6#
      • 1...Sxf5
        • 2.Se6#
      • 1...Rc1
        • 2.Sxb5#
      • 1...Rd1
        • 2.Sxb5#
      • 1...Re1
        • 2.Sxb5#
      • 1...Rf1
        • 2.Sxb5#
      • 1...Rg1
        • 2.Sxb5#
        • 2.Bxg1#
      • 1...Rh1
        • 2.Sxb5#
      • 1...Rb2
        • 2.Bg1#
      • 1...Rb3
        • 2.Bg1#
      • 1...Rb4
        • 2.Bg1#
      • 1...Bb2
        • 2.Sxb5#
      • 1...Sc1
        • 2.Bg1#
      • 1...Sb4
        • 2.Sxb5#
      • 1...Sh5
        • 2.Se6#
      • 1...Se6
        • 2.Sxe6#
      • 1...Se8
        • 2.Se6#
      • 1...b4
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::B(B),XR(b)
    • R(b);N_GUARD::B(B)
    • S(c);S_CUTR(b)::B(B)
  • Tries
    • Try
      • B(B);
      • Threat
        • B(B)
      • Refutation
        • S(i);
  • Actual
    • S(I);
    • Vars
      • K(e);S_FLIGHT::R(H)+S(I),DCHECK
      • S(i);N_GUARD,XP(F)::S(I)
      • R(b);N_GUARD::S(I),XP(f)
      • R(b);N_GUARD::B(B)
      • B(a);S_CUTR(b)::S(I),XP(f)
      • S(c);S_CUTR(b)::B(B)
      • S(c);S_CUTR(b)::S(I),XP(f)
      • S(i);N_GUARD::S(I)
      • S(i);N_GUARD::S(I),XS(i)
      • P(f);S_CUTR(b)::S(I)
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