MESON Chess Problem Database

Problem Display
PID: 272038 (8/3nB3/2N5/1Ppk4/3p1nB1/1PR2P2/3K4/3N4 w - - 0 1)

Nikitin, Aleksandr Olegovich

Shakhmatnaya kompozitsiya, 1998

8/3nB3/2N5/1Ppk4/3p1nB1/1PR2P2/3K4/3N4

#2

9 + 5

3713 Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Rxc5#
    • 1...Sb6
      • 2.Rxc5#
    • 1...Sf6
      • 2.Rxc5#
    • 1...Sb8
      • 2.Rxc5#
    • 1...Sf8
      • 2.Rxc5#
    • 1...dxc3+
      • 2.Sxc3#
    • 1...d3
      • 2.Se3#
    • 1...c4
      • 2.bxc4#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Sc3#
        • 2.Se3#
      • 1...Se2
        • 2.Se3#
      • 1...Sg2
        • 2.Sc3#
      • 1...Sxd3!
  • Keys
    • 1.Re3!
      • 1...dxe3+
        • 2.Sxe3#
      • 1...Se2
        • 2.Be6#
      • 1...Sg2
        • 2.Be6#
      • 1...Sd3
        • 2.Be6#
      • 1...Sh3
        • 2.Be6#
      • 1...Sh5
        • 2.Be6#
      • 1...Se6
        • 2.Bxe6#
      • 1...Sg6
        • 2.Be6#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sb6
        • 2.Re5#
      • 1...Sf6
        • 2.Re5#
      • 1...Sb8
        • 2.Re5#
      • 1...Sf8
        • 2.Re5#
      • 1...d3
        • 2.Sc3#
      • 1...c4
        • 2.Sb4#

Anticipated by 927(1993)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD::R1(D),XP(c)
    • P(a);CHECK,XR(D)::S(A),XP(a)
    • P(a);N_GUARD::S(A)
    • P(c);OGATE::P(C),XP(c)
  • Tries
    • Try
      • R(D);P_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::S(A)
      • Refutation
        • S(b);N_SPINP(a),XR(D)
  • Actual
    • R(D);
    • Vars
      • P(a);CHECK,XR(D)::S(A),XP(a)
      • S(b);N_GUARD::B(F)
      • S(b);N_GUARD::B(F),XS(b)
      • S(e);N_GUARD::R1(D),XS(e)
      • S(e);N_GUARD::R1(D)
      • P(a);N_GUARD::S(A)
      • P(c);N_GUARD::S(H)
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