MESON Chess Problem Database

Problem Display
PID: 48684 (7q/4p2p/nN2p2P/1R6/p2k4/p2p4/P5Rn/4QN1K w - - 0 1)

Thompson, Frederick

Chess Chips, 1878

7q/4p2p/nN2p2P/1R6/p2k4/p2p4/P5Rn/4QN1K

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qa8
      • 2.Qe5#
    • 1...Qc8
      • 2.Qe5#
    • 1...Qd8
      • 2.Qe5#
    • 1...Qe8
      • 2.Qe5#
    • 1...Qf8
      • 2.Qe5#
    • 1...Qg8
      • 2.Qe5#
    • 1...Sxf1
      • 2.Rg4#
    • 1...Sf3
      • 2.Rg4#
    • 1...Sg4
      • 2.Rxg4#
    • 1...Sb4
      • 2.Qxb4#
    • 1...Sc5
      • 2.Rb4#
    • 1...Sc7
      • 2.Qb4#
    • 1...Sb8
      • 2.Qb4#
    • 1...d2
      • 2.Qe3#
    • 1...e5
      • 2.Rd5#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Rc4#
        • 2.Qe3#
      • 1...Sxf1
        • 2.Rc4#
      • 1...dxc2
        • 2.Qe3#
      • 1...d2
        • 2.Qe3#
      • 1...Qe5
        • 2.Rc4#
        • 2.Qxe5#
      • 1...Qc8
        • 2.Qe3#
        • 2.Qe5#
      • 1...Sg4
        • 2.Rc4#
      • 1...Qa8+!
    • 1.Qf2+?
      • 1...Ke4
        • 2.Sd2#
        • 2.Sg3#
        • 2.Qe3#
      • 1...Kc3!
    • 1.Qh4+?
      • 1...Kc3
        • 2.Sxa4#
        • 2.Qc4#
      • 1...Sg4!
    • 1.Qe4+?
      • 1...Kc3
        • 2.Sxa4#
        • 2.Qc4#
      • 1...Kxe4!
  • Keys
    • 1.Rg8!
      • 1...Qxg8
        • 2.Qe5#
      • 1...Sxf1
        • 2.Rg4#
      • 1...d2
        • 2.Qe3#
      • 1...Qf6
        • 2.Rd8#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qg7
        • 2.Rd8#
      • 1...Sf3
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sc5
        • 2.Rb4#
      • 1...Sc7
        • 2.Qb4#
      • 1...Sb8
        • 2.Qb4#
      • 1...e5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(j);N_GUARD::QAB1(A),XQ(j)
    • Q(j);N_GUARD,P_PINR(E)::QAB1(A)
    • Q(j);N_GUARD::QAB1(A)
    • S(a);N_GUARD,XS(B)::R(E)
    • S(a);N_GUARD::R(E)
    • S(a);N_GUARD::R(E),XS(a)
    • S(f);N_GUARD::QAR2(A),XS(f)
    • S(f);N_GUARD,SBLOCK::R(F)
    • S(f);N_GUARD::QAR2(A)
    • P(c);::QAB1(A)
    • P(g);N_GUARD::R1(F)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XS(B)::R1(E)
        • P(c);XR(E)::QAB1(A)
        • P(c);::QAB1(A)
        • S(a);::R1(E)
      • Refutation
        • Q(j);CHECK
    • Try
      • Q(A);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(e);P-FLIGHT,XQ(A)
  • Actual
    • R(E);
    • Vars
      • Q(j);N_GUARD,XR(E)::QAB1(A)
      • S(a);N_GUARD,XS(B)::R(E)
      • P(c);::QAB1(A)
      • Q(j);N_GUARD::R(E)
      • Q(j);N_GUARD::QAB1(A),XQ(j)
      • S(a);N_GUARD::R(E)
      • S(a);N_GUARD::R(E),XS(a)
      • S(f);N_GUARD::QAR2(A),XS(f)
      • S(f);N_GUARD,SBLOCK::R(F)
      • S(f);N_GUARD::QAR2(A)
      • P(g);N_GUARD::R1(F)
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