MESON Chess Problem Database

Problem Display
PID: 132303 (1B6/8/6Kn/8/1nN1N3/5k1B/4p3/1Q2R3 w - - 0 1)

Rothwell, Stephen

Comm., Knobi's Knobelecke, 1991-1992

1B6/8/6Kn/8/1nN1N3/5k1B/4p3/1Q2R3

#2

7 + 4

6114 Problemschach-Jahrbuch (1994) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa6
      • 2.Qd3#
    • 1...Sc6
      • 2.Qd3#
  • Tries
    • 1.Rxe2?
      • threat
        • 2.Rf2#
        • 2.Re3#
        • 2.Qf1#
      • 1...Kxe2
        • 2.Qf1#
      • 1...Sd5
        • 2.Rf2#
        • 2.Qf1#
      • 1...Sc2
        • 2.Qf1#
      • 1...Sd3
        • 2.Re3#
        • 2.Qxd3#
      • 1...Sf5
        • 2.Rf2#
        • 2.Qf1#
      • 1...Sg4!
    • 1.Qb3+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Kxe4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qxe2#
      • 1...Kxe4
        • 2.Bg2#
      • 1...exd1Q
        • 2.Re3#
      • 1...exd1S
        • 2.Scd2#
      • 1...exd1B
        • 2.Scd2#
        • 2.Re3#
      • 1...exd1R
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::QAR2(A)
    • S(c);N_GUARD::QAR2(A),XS(c)
  • Tries
    • Try
      • R(B);XP(a)
      • Threat
        • DUALS(3)
      • Vars
        • K(b);S_FLIGHT,XR(B)::QAB1(A)
        • S(c);::QAR2(A)
      • Refutation
        • S(d);
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(A),XS(c)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XS(E)
  • Actual
    • Q(A);P_PINP(a)
    • Threat
      • QAB1(A),XP(a)
    • Vars
      • K(b);S_FLIGHT,XS(E)::B(C)
      • P(a);N_SPINP(a),OGATE,XQ(A)::R1(B)
      • P(a);N_SPINP(a),XQ(A)::S(D)
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