MESON Chess Problem Database

Problem Display
PID: 268518 (2Q3bB/3N4/2P2n1R/1p1k1N2/Rn6/3P4/3PK3/1B6 w - - 0 1)

Stevenson, Edward

The Problemist, 1956

2Q3bB/3N4/2P2n1R/1p1k1N2/Rn6/3P4/3PK3/1B6

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Bxa2#
    • 1...Sc2
      • 2.Ba2#
    • 1...Sxd3
      • 2.Ba2#
    • 1...Sa6
      • 2.Ba2#
    • 1...Sxc6
      • 2.Ba2#
    • 1...Se4
      • 2.Se3#
      • 2.Se7#
      • 2.Qxg8#
    • 1...Sg4
      • 2.Se7#
      • 2.Rd6#
      • 2.Qxg8#
    • 1...Sh5
      • 2.Se3#
      • 2.Se7#
      • 2.Rd6#
      • 2.Qxg8#
    • 1...Sh7
      • 2.Se3#
      • 2.Se7#
      • 2.Rd6#
      • 2.Qxg8#
    • 1...Se8
      • 2.Se3#
      • 2.Se7#
  • Tries
    • 1.Rxf6?
      • threat
        • 2.Rd6#
        • 2.Qxg8#
      • 1...Bf7
        • 2.Rd6#
      • 1...Bh7
        • 2.Rd6#
      • 1...Be6!
    • 1.Qc7?
      • threat
        • 2.Qd6#
      • 1...Se4
        • 2.Se3#
        • 2.Se7#
        • 2.Qe5#
      • 1...Se8
        • 2.Se3#
        • 2.Se7#
        • 2.Qe5#
      • 1...Ke6!
    • 1.Qxg8+?
      • 1...Sxg8
        • 2.Se3#
        • 2.Rd6#
      • 1...Kxc6!
  • Keys
    • 1.d4!
      • threat
        • 2.Sb6#
      • 1...Kc4
        • 2.Ba2#
      • 1...Ke6
        • 2.Qxg8#
      • 1...Sxd7
        • 2.Se3#
        • 2.Qxg8#
      • 1...Sc2
        • 2.Sxf6#
      • 1...Sd3
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::B(A),XS(a)
    • S(a);N_GUARD::B(A)
    • S(a);N_GUARD,XP(D)::B(A)
    • S(a);N_GUARD,XP(G)::B(A)
  • Tries
    • Try
      • R(H);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::R1(H)
      • Refutation
        • B(e);
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Refutation
        • K(c);P_SPINS(d),S_FLIGHT
    • Try
      • Q(J);CHECK,XB(e)
      • Refutation
        • K(c);P_SPINS(d),S_FLIGHT,XP(G)
  • Actual
    • P(D);
    • Threat
      • S(I)
    • Vars
      • K(c);N_GUARD,P_SPINS(a),S_FLIGHT::B(A)
      • K(c);N_GUARD,P_SPINS(d),S_FLIGHT::QAB(J),XB(e)
      • S(a);::S(I),XS(d)
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