MESON Chess Problem Database

Problem Display
PID: 66132 (8/8/4K3/pp2Q3/bk6/bnR2N2/rn6/rR6 w - - 0 1)

Shankar Ram, Narayanan

Die Schwalbe, 1986

8/8/4K3/pp2Q3/bk6/bnR2N2/rn6/rR6

#2

5 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd4#
      • 2.Qc5#
    • 1...Sd3
      • 2.Qd4#
    • 1...Sc1
      • 2.Qd4#
      • 2.Qc5#
    • 1...Sd2
      • 2.Qc5#
    • 1...Sd4+
      • 2.Qxd4#
    • 1...Sc5+
      • 2.Qxc5#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Sc2#
        • 2.Sc6#
      • 1...Sxd4+
        • 2.Qxd4#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Sc4
        • 2.Sc6#
      • 1...Sd1
        • 2.Sc6#
        • 2.Qc5#
      • 1...Sd3
        • 2.Sc6#
      • 1...Sc1
        • 2.Sc6#
        • 2.Qc5#
      • 1...Sd2
        • 2.Sc6#
        • 2.Qc5#
      • 1...Kxc3!
    • 1.Qd6+?
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Kxc3!
  • Keys
    • 1.Se1!
      • threat
        • 2.Sc2#
      • 1...Sd4+
        • 2.Qxd4#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sd1
        • 2.Sd3#
        • 2.Qd4#
        • 2.Qc5#
      • 1...Sd3
        • 2.Sxd3#
        • 2.Qd4#
      • 1...Sc1
        • 2.Qd4#
        • 2.Qc5#
      • 1...Sd2
        • 2.Sd3#
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(c);N_GUARD,P_SPINS(e)::QAR2(D)
    • S(e);N_GUARD,P_SPINS(c)::QAB1(D)
    • S(e);CHECK,N_GUARD,P_SPINS(c)::QAR2(D),XS(e)
    • S(e);CHECK,N_GUARD,P_SPINS(c)::QAB1(D),XS(e)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);CHECK,OGATE,P_SPINS(c),XS(C)::QAR2(D),XS(e)
        • S(e);CHECK,N_GUARD,P_SPINS(c)::QAB1(D),XS(e)
        • S(c);P_SPINS(e)::S(C)
      • Refutation
        • K(g);S_FLIGHT,XR(B)
    • Try
      • Q(D);CHECK
      • Vars
        • S(e);CHECK,N_GUARD,P_SPINS(c)::QAB1(D),XS(e)
      • Refutation
        • K(g);S_FLIGHT,XR(B)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • S(e);CHECK,N_GUARD,P_SPINS(c)::QAR2(D),XS(e)
      • S(e);CHECK,N_GUARD,P_SPINS(c)::QAB1(D),XS(e)
      • S(c);N_GUARD,P_SPINS(e)::S(C)
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