MESON Chess Problem Database

Problem Display
PID: 23739 (5K1n/6NN/6pk/6R1/6p1/8/7P/1Q6 w - - 0 1)

Chandrasekaran, KR

Falanga, 1996

5K1n/6NN/6pk/6R1/6p1/8/7P/1Q6

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh7
      • 2.Rh5#
    • 1...Sf7
      • 2.Qxg6#
  • Tries
    • 1.Kg8?
      • 1...Sf7
        • 2.Rxg6#
        • 2.Qxg6#
      • 1...g3!
    • 1.Se6?
      • 1...Kxh7
        • 2.Rh5#
      • 1...Sf7
        • 2.Qxg6#
      • 1...g3!
    • 1.Se8?
      • 1...Kxh7
        • 2.Rh5#
      • 1...Sf7
        • 2.Qxg6#
      • 1...g3!
    • 1.Rxg4?
      • threat
        • 2.Rh4#
      • 1...Kxh7
        • 2.Rh4#
      • 1...g5!
    • 1.Qc2?
      • 1...Kxh7
        • 2.Rh5#
      • 1...Sf7
        • 2.Qxg6#
      • 1...g3!
    • 1.Qd3?
      • 1...Kxh7
        • 2.Rh5#
      • 1...Sf7
        • 2.Qxg6#
      • 1...g3!
    • 1.Qf5?
      • 1...Kxh7
        • 2.Rh5#
      • 1...g3
        • 2.Qh3#
      • 1...Sf7
        • 2.Qxg6#
      • 1...gxf5!
    • 1.Qe1?
      • threat
        • 2.Qh4#
      • 1...Kxh7
        • 2.Qh4#
      • 1...g3!
  • Keys
    • 1.Qe4!
      • 1...Kxh7
        • 2.Rh5#
      • 1...g3
        • 2.Qh4#
      • 1...Sf7
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINP(b),XS(E)::R(C)
    • S(d);N_GUARD::QAR1(A),XP(b)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Refutation
        • P(a);
    • Try
      • S(D);
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(E)::R(C)
        • S(d);N_GUARD::QAR1(A),XP(b)
      • Refutation
        • P(a);
    • Try
      • S(D);
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(E)::R(C)
        • S(d);N_GUARD::QAR1(A),XP(b)
      • Refutation
        • P(a);
    • Try
      • R(C);XP(a)
      • Threat
        • R(C)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(E)::R(C)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(E)::R(C)
        • S(d);N_GUARD::QAR1(A),XP(b)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(E)::R(C)
        • S(d);N_GUARD::QAR1(A),XP(b)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XS(E)::R(C)
        • P(a);OGATE::QAR(A)
        • S(d);N_GUARD::QAR1(A),XP(b)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAR(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT,P_SPINP(b),XS(E)::R(C)
      • P(a);OGATE::QAR2(A)
      • S(d);N_GUARD::QAR1(A),XP(b)
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