MESON Chess Problem Database

Problem Display
PID: 134827 (3b4/8/4rp2/3pNK2/pQpk1P1R/1R3P2/2pN1P2/2qnn3 w - - 0 1)

Forster, Klaus

Die Schwalbe, 2009

3b4/8/4rp2/3pNK2/pQpk1P1R/1R3P2/2pN1P2/2qnn3

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5+
      • 2.fxe5#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Re7
      • 2.Sc6#
    • 1...Re8
      • 2.Sc6#
    • 1...Se3+
      • 2.fxe3#
    • 1...Sg2
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
    • 1...Sxf3
      • 2.Sdxf3#
      • 2.Sexf3#
      • 2.Rd3#
    • 1...axb3
      • 2.Sxb3#
  • Keys
    • 1.Sdxc4!
      • threat
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Qxf4+
        • 2.Rxf4#
      • 1...Rxe5+
        • 2.Sxe5#
      • 1...Se3+
        • 2.Sxe3#
      • 1...dxc4
        • 2.Qxc4#
      • 1...Qb2
        • 2.Sxb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Qd2
        • 2.Sxd2#
      • 1...Qa3
        • 2.Sxa3#
      • 1...Qe3
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sxe3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Rb6
        • 2.Sxb6#
      • 1...Rc6
        • 2.Sxc6#
      • 1...Rd6
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sxd6#
      • 1...Ba5
        • 2.Sxa5#
      • 1...Bb6
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sxb6#
        • 2.Sd6#
      • 1...Be7
        • 2.Sd6#
      • 1...Sb2
        • 2.Sxb2#
      • 1...Sd3
        • 2.Rxd3#
      • 1...a3
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sxa3#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sb6#
        • 2.Sd6#

This is a version of 102809

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(i);CHECK,OGATE,XS(H)::R(G)+P(F),XR(i)
    • R(i);N_GUARD::S(H),XR(i)
    • R(i);N_GUARD::S(H)
    • S(b);CHECK,OGATE::P(B),XS(b)
    • S(c);N_GUARD::R1(C)
    • S(c);N_GUARD::R1(C),XS(c)
    • P(e);XR(C)::S(A),XP(e)
  • Actual
    • S(A);XP(f)
    • Threat
      • DUALS(7)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XP(F)::R(G),XQ(a)
      • R(i);CHECK,XS(H)::QAR(E)+S(A),XR(i)
      • S(b);CHECK::QAR(E)+S(A),XS(b)
      • P(h);OGATE,P_SPINP(h),XS(A)::QAR1(E),XP(h)
      • Q(a);::QAR(E)+S(A),XQ(a)
      • R(i);::QAR(E)+S(A),XR(i)
      • R(i);N_GUARD::S(H),XR(i)
      • B(k);::QAR(E)+S(A),XB(k)
      • B(k);::QAR(E)+S(A)
      • S(b);::QAR(E)+S(A),XS(b)
      • S(c);N_GUARD::R1(C),XS(c)
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