MESON Chess Problem Database

Problem Display
PID: 152479 (5N2/K3N3/2P3P1/4P3/1p2qk2/1P1R2RP/8/6Qn w - - 0 1)

Clark, WA

Hampstead and Highgate Express, 1898

(First published on Sat Aug 20 1898)

5N2/K3N3/2P3P1/4P3/1p2qk2/1P1R2RP/8/6Qn

#2

11 + 4

14867 BCPS Library 1898

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Qe3#
    • 1...Qd5
      • 2.Qe3#
    • 1...Qf5
      • 2.Qe3#
    • 1...Qxc6
      • 2.Qe3#
    • 1...Qxg6
      • 2.Qe3#
    • 1...Qe3+
      • 2.Qxe3#
    • 1...Qc4
      • 2.Qe3#
    • 1...Qd4+
      • 2.Qxd4#
    • 1...Qxe5
      • 2.Rg4#
    • 1...Sxg3
      • 2.Qxg3#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Se6#
        • 2.Rdf3#
        • 2.Rg4#
      • 1...Sxg3
        • 2.Se6#
      • 1...Sf2
        • 2.Se6#
        • 2.Rdf3#
      • 1...Qxd4+!
    • 1.Qc1+?
      • 1...Qe3+
        • 2.Qxe3#
      • 1...Kxe5!
  • Keys
    • 1.Rge3!
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...Qd4+
        • 2.Rxd4#
      • 1...Kxe5
        • 2.Qg5#
      • 1...Qxd3
        • 2.Se6#
      • 1...Qxc6
        • 2.Qg4#
      • 1...Qxg6
        • 2.Sfxg6#
      • 1...Qxe5
        • 2.Qg4#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Qg2
        • 2.Se6#
      • 1...Qf3
        • 2.Se6#
      • 1...Qd5
        • 2.Qg4#
      • 1...Qf5
        • 2.Sd5#
      • 1...Qc4
        • 2.Qg4#
      • 1...Sf2
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 8
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD::QAB1(A)
    • Q(c);N_GUARD,XP(G)::QAB1(A)
    • Q(c);N_GUARD,XP(H)::QAB1(A)
    • Q(c);CHECK,N_GUARD::QAB1(A),XQ(c)
    • Q(c);CHECK,OGATEB::QAR2(A),XQ(c)
    • Q(c);SBLOCK,XP(F)::R1(D)
    • S(a);OGATE,XR(D)::QAB1(A),XS(a)
  • Tries
    • Try
      • Q(A);P_PINQ(c)
      • Threat
        • DUALS(3)
      • Vars
        • S(a);XR(D)::S(K)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAB1(A),XQ(c)
      • Refutation
        • K(d);S_FLIGHT,XP(F)
  • Actual
    • R(D);
    • Vars
      • Q(c);CHECK,OGATE,XR(D)::QAB1(A),XQ(c)
      • Q(c);CHECK,OGATEB::R(C),XQ(c)
      • K(d);P_SPINQ(c),S_FLIGHT,XP(F)::QAR2(A)
      • Q(c);XR(C)::S(K)
      • Q(c);XP(G)::QAR1(A)
      • Q(c);XP(H)::S(K),XQ(c)
      • Q(c);XP(F)::QAR1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • Q(c);::S(K)
      • Q(c);::QAR1(A)
      • Q(c);N_GUARD,SBLOCK::S(J)
      • S(a);N_GUARD::QAB1(A)
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