MESON Chess Problem Database

Problem Display
PID: 100302 (4n3/pR6/Pn1p1p2/p2P1P2/p1kPK2p/P1N3pR/3p4/1N1B4 w - - 0 1)

Shedey, Sergey Oleksandrovich

Suomen Shakki, 1976

4n3/pR6/Pn1p1p2/p2P1P2/p1kPK2p/P1N3pR/3p4/1N1B4

#2

11 + 11

6490 yacpdb 2009
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Be2#
    • 1...Sd7
      • 2.Be2#
    • 1...Sa8
      • 2.Be2#
    • 1...Sc8
      • 2.Be2#
    • 1...Sc7
      • 2.Rxc7#
    • 1...Sg7
      • 2.Rc7#
    • 1...g2
      • 2.Sxd2#
  • Tries
    • 1.Rxh4?
      • 1...Sxd5
        • 2.Be2#
      • 1...Sd7
        • 2.Be2#
      • 1...Sa8
        • 2.Be2#
      • 1...Sc8
        • 2.Be2#
      • 1...Sc7
        • 2.Rxc7#
      • 1...Sg7
        • 2.Rc7#
      • 1...g2!
  • Keys
    • 1.Sb5!
      • 1...Kxb5
        • 2.Be2#
      • 1...Sxd5
        • 2.Sxd2#
      • 1...Sc7
        • 2.Sxd6#
      • 1...Sd7
        • 2.Sxd2#
      • 1...Sa8
        • 2.Sxd2#
      • 1...Sc8
        • 2.Sxd2#
      • 1...Sg7
        • 2.Sxd6#
      • 1...g2
        • 2.Be2#

Anticipated by 17846(1951)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 7
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(g);XP(H)::B(B)
    • S(g);::B(B)
    • S(k);N_GUARD::R(K),XS(k)
    • S(k);N_GUARD::R(K)
    • P(b);::S(A),XP(a)
  • Tries
    • Try
      • R(E);XP(e)
      • Vars
        • S(g);XP(H)::B(B)
        • S(g);::B(B)
        • S(k);N_GUARD::R(K),XS(k)
        • S(k);N_GUARD::R(K)
      • Refutation
        • P(b);
  • Actual
    • S(D);
    • Vars
      • K(d);P_SPINS(g),S_FLIGHT,XS(D)::B(B)
      • S(g);XP(H)::S(A),XP(a)
      • S(k);N_GUARD::S(D),XP(h)
      • S(g);::S(A),XP(a)
      • P(b);::B(B)
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