MESON Chess Problem Database

Problem Display
PID: 53426 (8/2N5/8/k2NQ3/P1R5/Pp6/n2p4/1K1B4 w - - 0 1)

Loyd, Sam

Detroit Free Press, 1878

8/2N5/8/k2NQ3/P1R5/Pp6/n2p4/1K1B4

#2

8 + 4

5206 Sam Loyd and His Chess Problems 1913
461 Schach-Express 1950

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qc3#
    • 1...Sc3+
      • 2.Qxc3#
    • 1...b2
      • 2.Rc5#
  • Tries
    • 1.Kb2?
      • 1...Sc1
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb4!
    • 1.Rb4?
      • threat
        • 2.Sc3#
        • 2.Se3#
        • 2.Sf4#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Se7#
      • 1...Sc3+
        • 2.Sxc3#
      • 1...Sxb4!
    • 1.Rc6?
      • threat
        • 2.Sc3#
        • 2.Sb6#
        • 2.Ra6#
      • 1...Sc3+
        • 2.Sxc3#
      • 1...Kxa4
        • 2.Ra6#
      • 1...Sb4!
    • 1.Qb2?
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sc1
        • 2.Qc3#
        • 2.Qxd2#
      • 1...Sb4!
    • 1.Qc3+?
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sxc3+!
    • 1.Qg3?
      • 1...Sc3+
        • 2.Qxc3#
      • 1...b2
        • 2.Rc5#
      • 1...Sc1
        • 2.Qc3#
      • 1...Sb4!
    • 1.Qd4?
      • threat
        • 2.Rc5#
        • 2.Qc5#
        • 2.Qb6#
        • 2.Qa7#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sb4!
    • 1.Qd6?
      • threat
        • 2.Qc5#
        • 2.Qa6#
        • 2.Qb6#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sc3+!
    • 1.Qf6?
      • threat
        • 2.Qa6#
        • 2.Qb6#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sb4!
    • 1.Qg7?
      • 1...Sc3+
        • 2.Qxc3#
      • 1...b2
        • 2.Rc5#
      • 1...Sc1
        • 2.Qc3#
      • 1...Sb4!
    • 1.Qh8?
      • threat
        • 2.Qa8#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sb4!
    • 1.Qe3?
      • threat
        • 2.Qc5#
        • 2.Qb6#
        • 2.Qa7#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sb4!
    • 1.Qe7?
      • threat
        • 2.Qc5#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sc3+!
    • 1.Qe8?
      • threat
        • 2.Rc5#
        • 2.Qb5#
        • 2.Qa8#
      • 1...Sb4
        • 2.Rc5#
        • 2.Qb5#
        • 2.axb4#
      • 1...Sc3+!
  • Keys
    • 1.Qa1!
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sb4
        • 2.axb4#
      • 1...b2
        • 2.Rc5#
      • 1...Sc1
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(G)
    • S(a);CHECK,N_GUARD::QAB(G),XS(a)
    • P(c);::R(E)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAB(G)
        • S(a);N_GUARD::QAB(G),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(E);
      • Threat
        • DUALS(6)
      • Vars
        • S(a);CHECK::QAR(G)+S(F),XS(a)
      • Refutation
        • S(a);XR(E)
    • Try
      • R(E);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);CHECK::QAR(G)+S(F),XS(a)
        • K(d);P-FLIGHT,P_SPINP(c),XP(D)::R(E)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(G);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(G),XS(a)
      • Refutation
        • S(a);CHECK,XQ(G)
    • Try
      • Q(G);
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
        • P(c);::R(E)
        • S(a);N_GUARD::QAB(G)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Threat
        • DUALS(4)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);N_GUARD::QAB1(G),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
        • P(c);::R(E)
        • S(a);N_GUARD::QAB(G)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • S(a);N_GUARD::QAB1(G),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Refutation
        • S(a);CHECK
  • Actual
    • Q(G);
    • Vars
      • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • S(a);OGATE::P(C),XS(a)
      • P(c);::R(E)
      • S(a);N_GUARD::QAB(G)
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