MESON Chess Problem Database

Problem Display
PID: 186945 (4R2K/8/qp1N4/3p4/N2k2P1/2Rbn3/2P2n2/6BQ w - - 0 1)

Dittrich, Stefan

Muller, Dieter

3rd HM., Suomen Shakki, 1981

4R2K/8/qp1N4/3p4/N2k2P1/2Rbn3/2P2n2/6BQ

#2

9 + 7

117 Suomen Shakki 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Sxh1
      • 2.Bxe3#
    • 1...Sh3
      • 2.Bxe3#
    • 1...Se4
      • 2.Sf5#
    • 1...Sc4
      • 2.Rxd3#
  • Tries
    • 1.Rxd3+?
      • 1...Sxd3
        • 2.Bxe3#
        • 2.c3#
      • 1...Qxd3!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qf6#
      • 1...Sfxg4
        • 2.Bxe3#
      • 1...Sexg4
        • 2.Bxf2#
      • 1...Se4
        • 2.Sf5#
      • 1...Sc4
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATE,P_SPINS(c),XQ(B)::B(A),XS(c)
    • S(a);OGATE,P_SPINS(c)::B(A),XS(c)
    • S(a);P_SPINS(c),S_CUTB(b)::S(G)
    • S(c);P_SPINS(a),S_CUTQ(f)::R1(D),XB(b)
  • Tries
    • Try
      • R(D);CHECK,XB(b)
      • Refutation
        • Q(f);XR(D)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • S(a);OGATE,P_SPINS(c),XP(F)::B(A),XS(c)
      • S(c);OGATEB,P_SPINS(a),XP(F)::B(A),XS(a)
      • S(a);P_SPINS(c),S_CUTB(b)::S(G)
      • S(c);P_SPINS(a),S_CUTQ(f)::R1(D),XB(b)
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