MESON Chess Problem Database

Problem Display
PID: 133797 (6rn/2qN1p1Q/5P2/5Nk1/7p/2R4P/3PPP2/2B1RK2 w - - 0 1)

Karwatkar, Abdul Jabbar

3rd HM., Probleemblad, 1965

6rn/2qN1p1Q/5P2/5Nk1/7p/2R4P/3PPP2/2B1RK2

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.d3#
    • 1...Qa5
      • 2.d3#
      • 2.d4#
    • 1...Qb6
      • 2.d4#
    • 1...Qd8
      • 2.d3#
      • 2.d4#
    • 1...Qxc3
      • 2.dxc3#
    • 1...Qc4
      • 2.d4#
    • 1...Qc5
      • 2.d4#
    • 1...Qc6
      • 2.d3#
      • 2.d4#
    • 1...Qa7
      • 2.d4#
    • 1...Qb7
      • 2.d3#
      • 2.d4#
    • 1...Qc8
      • 2.d3#
      • 2.d4#
  • Tries
    • 1.Rf3?
      • threat
        • 2.Qh6#
      • 1...Rg6
        • 2.Qxh4#
      • 1...Qf4!
    • 1.Qxg8+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Kh5
        • 2.Qg4#
      • 1...Sg6!
    • 1.Qxh4+?
      • 1...Kg6
        • 2.Se7#
      • 1...Kxf5!
    • 1.Qh5+?
      • 1...Kf4
        • 2.d3#
      • 1...Kxh5!
    • 1.f4+?
      • 1...Kxf4
        • 2.d3#
      • 1...Qxf4+!
  • Keys
    • 1.e4!
      • threat
        • 2.Qh6#
      • 1...Qc4+
        • 2.d3#
      • 1...Kf4
        • 2.d4#
      • 1...Rg6
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(b);S_FLIGHT::B(A)+P(D)
    • Q(c);N_GUARD::B(A)+P(D)
    • Q(c);OGATE,XR(G)::B(A)+P(D),XQ(c)
    • Q(c);N_GUARD,P_PINP(E)::B(A)+P(D)
  • Tries
    • Try
      • R(G);
      • Threat
        • QAB1(L)
      • Vars
        • R(e);SBLOCK::QAB1(L),XP(a)
      • Refutation
        • Q(c);
    • Try
      • Q(L);CHECK,XR(e)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(L)
        • K(b);OGATE,P-FLIGHT,XS(I)::QAB1(L)
        • K(b);OGATE,P-FLIGHT::QAB1(L)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • Q(L);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::S(I)
      • Refutation
        • K(b);P-FLIGHT,XS(I)
    • Try
      • Q(L);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)+P(D)
      • Refutation
        • K(b);P-FLIGHT,XQ(L)
    • Try
      • P(F);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(F)::B(A)+P(D)
      • Refutation
        • Q(c);CHECK,XP(F)
  • Actual
    • P(E);
    • Threat
      • QAB1(L)
    • Vars
      • Q(c);CHECK,N_GUARD::B(A)+P(D)
      • K(b);S_FLIGHT::B(A)+P(D)
      • R(e);SBLOCK::QAB1(L),XP(a)
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