MESON Chess Problem Database

Problem Display
PID: 139174 (8/N7/2pp4/3p4/1k1r3R/5P2/3N4/Q3BK2 w - - 0 1)

Hoek, Willem

Probleemblad, 1974

8/N7/2pp4/3p4/1k1r3R/5P2/3N4/Q3BK2

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qxd4#
      • 2.Qa5#
  • Tries
    • 1.Sb1+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kc5
        • 2.Qxd4#
      • 1...Kb3!
    • 1.Sb3+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kxb3!
    • 1.Sc4+?
      • 1...Kxc4
        • 2.Qc3#
      • 1...Kc5
        • 2.Qxd4#
      • 1...Rd2
        • 2.Qa3#
      • 1...Kb3!
    • 1.Qc3+?
      • 1...Ka4
        • 2.Rxd4#
      • 1...Kxc3!
    • 1.Qxd4+?
      • 1...Ka3
        • 2.Qa1#
      • 1...Ka5!
    • 1.Qa4+?
      • 1...Kc3
        • 2.Qb3#
      • 1...Kc5
        • 2.Qxd4#
        • 2.Qa5#
      • 1...Kxa4!
  • Keys
    • 1.Qa2!
      • 1...Kc3
        • 2.Qb3#
      • 1...Kc5
        • 2.Qa5#
      • 1...Rxh4
        • 2.Se4#
      • 1...Rc4
        • 2.Sb3#
      • 1...Re4
        • 2.Sxe4#
      • 1...Rf4
        • 2.Se4#
      • 1...Rg4
        • 2.Se4#
      • 1...c5
        • 2.Sb1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);N_SPINR(b),S_FLIGHT::QAB1(A),XR(b)
      • Refutation
        • K(a);N_SPINR(b),P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);N_SPINR(b),P-FLIGHT,XS(D)
    • Try
      • S(D);CHECK,N_PINR(b)
      • Vars
        • K(a);P-FLIGHT,P_SPINR(b),XS(D)::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A),XR(b)
        • R(b);P_SPINR(b)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(F),XR(b)
      • Refutation
        • K(a);N_SPINR(b),S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK,XR(b)
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_SPINR(b),S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);N_SPINR(b),S_FLIGHT::QAR1(A)
      • K(a);N_SPINR(b),S_FLIGHT::QAR2(A)
      • R(b);N_GUARD,N_SPINR(b),XR(F)::B(B)+S(D)
      • R(b);::B(B)+S(D)
      • R(b);N_GUARD::B(B)+S(D),XR(b)
      • R(b);N_GUARD,P_PINP(E)::B(B)+S(D)
      • R(b);N_GUARD::B(B)+S(D)
      • P(d);SBLOCK::B(B)+S(D)
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