MESON Chess Problem Database

Problem Display
PID: 141415 (K2NQn2/P4p2/5p2/n1pk4/4R3/B2P4/8/8 w - - 0 1)

Markwick, Frederick W

East Ham Echo, 1901

(First published on Fri Feb 8 1901)

K2NQn2/P4p2/5p2/n1pk4/4R3/B2P4/8/8

#2

7 + 6

4817 English Mechanic and World of Science 1908
14867 BCPS Library 2011
15351 SCPF/BCPS Black Books 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qc6#
    • 1...Sc4
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sb7
      • 2.Qc6#
    • 1...Se6
      • 2.Qd7#
    • 1...Sg6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...Sh7
      • 2.Qd7#
    • 1...c4
      • 2.Qb5#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Rd4+?
      • 1...cxd4
        • 2.Qb5#
        • 2.Qe4#
      • 1...Kxd4!
    • 1.Qb5?
      • threat
        • 2.Qxc5#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Se6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Kd6!
    • 1.Qxf7+?
      • 1...Se6
        • 2.Qxe6#
        • 2.Qd7#
      • 1...Kd6!
  • Keys
    • 1.Kb8!
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Kd6
        • 2.Rd4#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Se6
        • 2.Qd7#
      • 1...Sg6
        • 2.Qd7#
      • 1...Sh7
        • 2.Qd7#
      • 1...c4
        • 2.Qb5#
      • 1...f5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(G)
    • S(a);N_GUARD::QAB1(G),XS(a)
    • S(f);N_GUARD::QAR2(G)
    • S(f);N_GUARD::QAR2(G),XS(f)
    • P(b);OGATEB::QAR2(G)
    • P(d);N_GUARD::QAR1(G)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);P-FLIGHT,XR(C)
    • Try
      • Q(G);P_PINP(b)
      • Threat
        • QAR1(G),XP(b)
      • Vars
        • S(a);N_GUARD::QAB1(G)
        • S(f);N_GUARD::QAR2(G)
        • S(f);N_GUARD::QAR2(G),XS(f)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(G);CHECK,XP(e)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b)
  • Actual
    • K(E);P-FLIGHT
    • Vars
      • S(a);CHECK,N_GUARD::QAB1(G),XS(a)
      • S(f);CHECK,N_GUARD::QAR2(G),XS(f)
      • K(c);P-FLIGHT,P_SPINP(b)::R(C)
      • S(a);N_GUARD::QAB1(G)
      • S(f);N_GUARD::QAR2(G)
      • P(b);OGATEB::QAR2(G)
      • P(d);N_GUARD::QAR1(G)
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