MESON Chess Problem Database

Problem Display
PID: 30526 (8/n1pK3p/Q3p2r/2Nkp1R1/2p1N3/2P1pp2/8/8 w - - 0 1)

Shire, David J

Probleemblad, 1991

8/n1pK3p/Q3p2r/2Nkp1R1/2p1N3/2P1pp2/8/8

#2

6 + 10

3256 David Shire Selected Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qxe6#
    • 1...Rh2
      • 2.Qxe6#
    • 1...Rh3
      • 2.Qxe6#
    • 1...Rh4
      • 2.Qxe6#
    • 1...Rh5
      • 2.Qxe6#
    • 1...Sb5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sc8
      • 2.Qc6#
  • Tries
    • 1.Kxc7?
      • threat
        • 2.Qd6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc8
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qa8#
      • 1...Sb5+!
    • 1.Sd6?
      • threat
        • 2.Qxc4#
      • 1...Kxc5
        • 2.Rxe5#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Sb5
        • 2.Qc6#
      • 1...Rh4!
    • 1.Sf6+?
      • 1...Kxc5
        • 2.Rxe5#
      • 1...Rxf6!
    • 1.Rg1?
      • threat
        • 2.Rd1#
      • 1...Rh1
        • 2.Qxe6#
      • 1...Rh2
        • 2.Qxe6#
      • 1...Sb5
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...e2!
    • 1.Qb7+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...c6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Rxe5#
      • 1...Kxe4
        • 2.Qxc4#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Rh5
        • 2.Sf6#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(g);N_GUARD::QAB1(E),XP(f)
    • S(h);N_GUARD::QAB1(E)
    • S(h);N_GUARD::QAB1(E),XS(h)
  • Tries
    • Try
      • K(F);P-FLIGHT,XP(i)
      • Threat
        • QAR1(E)
      • Vars
        • S(h);N_GUARD::QAB1(E),XS(h)
      • Refutation
        • S(h);CHECK
    • Try
      • S(B);
      • Threat
        • QAB1(E),XP(c)
      • Vars
        • K(d);P-FLIGHT,XS(C)::R(D),XP(e)
        • P(i);OGATE,XS(B)::QAR1(E),XP(i)
        • S(h);N_GUARD::QAB1(E)
      • Refutation
        • R(g);
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT,XS(C)::R(D),XP(e)
      • Refutation
        • R(g);XS(B)
    • Try
      • R(D);N_PINP(e)
      • Threat
        • R(D)
      • Vars
        • R(g);N_GUARD::QAB1(E),XP(f)
        • S(h);N_GUARD::QAB1(E)
        • S(h);N_GUARD::QAB1(E),XS(h)
      • Refutation
        • P(a);
    • Try
      • Q(E);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB1(E),XS(h)
      • Refutation
        • P(i);
  • Actual
    • S(C);
    • Threat
      • R1(D),XP(e)
    • Vars
      • K(d);N_SPINP(e),S_FLIGHT,XS(B)::QAR2(E),XP(c)
      • P(c);OGATE,XS(C)::QAR2(E),XP(c)
      • R(g);N_GUARD::S(B)
      • S(h);N_GUARD::QAB1(E),XS(h)
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