MESON Chess Problem Database

Problem Display
PID: 38873 (8/2N5/1n6/4Q3/2k5/1R6/K7/1n6 w - - 0 1)

Lokker, Miklosh S

Pajtas, 1967

8/2N5/1n6/4Q3/2k5/1R6/K7/1n6

#2

4 + 3

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qc3#
    • 1...Sa3
      • 2.Qc3#
    • 1...Sc3+
      • 2.Qxc3#
    • 1...Sa4
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sd7
      • 2.Qd5#
    • 1...Sa8
      • 2.Qd5#
    • 1...Sc8
      • 2.Qd5#
  • Tries
    • 1.Ka1?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd2
        • 2.Qc3#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sa4
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sa8
        • 2.Qd5#
      • 1...Sc8
        • 2.Qd5#
      • 1...Kxb3!
    • 1.Kxb1?
      • threat
        • 2.Qc3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa4
        • 2.Qd5#
      • 1...Kxb3!
    • 1.Kb2?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd2
        • 2.Qc3#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sa8
        • 2.Qd5#
      • 1...Sc8
        • 2.Qd5#
      • 1...Sa4+!
    • 1.Sb5?
      • threat
        • 2.Sd6#
        • 2.Qd4#
      • 1...Sd5
        • 2.Qd4#
      • 1...Sc8
        • 2.Qd4#
      • 1...Sc3+!
    • 1.Se6?
      • threat
        • 2.Qd4#
        • 2.Qe4#
        • 2.Qb5#
        • 2.Qc5#
      • 1...Sd2
        • 2.Qd4#
        • 2.Qb5#
        • 2.Qc5#
      • 1...Sa3
        • 2.Qd4#
        • 2.Qe4#
        • 2.Qc5#
      • 1...Sa4
        • 2.Qd4#
        • 2.Qe4#
        • 2.Qb5#
      • 1...Sd5
        • 2.Qd4#
        • 2.Qe2#
        • 2.Qe4#
      • 1...Sd7
        • 2.Qd4#
        • 2.Qe4#
        • 2.Qb5#
      • 1...Sc3+!
    • 1.Rd3?
      • threat
        • 2.Qd4#
        • 2.Qb5#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Kb4
        • 2.Qb5#
      • 1...Sd5
        • 2.Qd4#
      • 1...Sa3
        • 2.Qc3#
        • 2.Qd4#
      • 1...Kxd3!
    • 1.Qd6?
      • threat
        • 2.Qb4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sc3+!
    • 1.Qa5?
      • threat
        • 2.Qb4#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Kd4!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Qe4#
        • 2.Qc5#
      • 1...Sc3+
        • 2.Rxc3#
      • 1...Sd2
        • 2.Rc3#
        • 2.Qc5#
      • 1...Sa4
        • 2.Qe4#
      • 1...Sd5
        • 2.Qe4#
      • 1...Sd7
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAR1(C)
    • S(a);CHECK,N_GUARD::QAR1(C),XS(a)
    • S(c);N_GUARD::QAB1(C)
    • S(c);N_GUARD::QAB1(C),XS(c)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(a);N_GUARD::QAR1(C)
        • S(c);N_GUARD::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
    • Try
      • K(A);S_FLIGHT,XS(a)
      • Threat
        • QAR1(C)
      • Vars
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(c);N_GUARD::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(a);N_GUARD::QAR1(C)
        • S(c);N_GUARD::QAB1(C)
      • Refutation
        • S(c);CHECK
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::QAR1(C)
      • Refutation
        • S(a);CHECK
    • Try
      • S(D);
      • Threat
        • DUALS(4)
      • Refutation
        • S(a);CHECK
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::QAR1(C),XS(a)
        • K(b);P-FLIGHT::QAR1(C)
        • S(c);::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(c);N_GUARD::QAB1(C),XS(c)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);CHECK,N_GUARD::QAR1(C),XS(a)
        • S(c);N_GUARD::QAB1(C),XS(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • S(a);CHECK,N_GUARD::R1(B),XS(a)
      • S(c);::QAR2(C)
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