MESON Chess Problem Database

Problem Display
PID: 258458 (3RN3/1K1n2p1/6Q1/1Pp1n2R/2kNp3/8/P5B1/4B3 w - - 0 1)

Williams, WP

English Mechanic and World of Science, 1893

(First published on Fri Mar 31 1893)

3RN3/1K1n2p1/6Q1/1Pp1n2R/2kNp3/8/P5B1/4B3

#2

10 + 6

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qxe4#
  • Tries
    • 1.Sd6+?
      • 1...Kd3
        • 2.Qxe4#
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Qxe4?
      • threat
        • 2.Sd6#
      • 1...Sf7
        • 2.Bf1#
      • 1...cxd4!
  • Keys
    • 1.Sc2!
      • 1...Kd3
        • 2.Qxe4#
      • 1...Kxb5
        • 2.Qa6#
      • 1...Kd5
        • 2.Qf7#
      • 1...Sxg6
        • 2.Bf1#
      • 1...Sd3
        • 2.Sd6#
      • 1...Sf3
        • 2.Bf1#
      • 1...Sg4
        • 2.Bf1#
      • 1...Sc6
        • 2.Bf1#
      • 1...Sf7
        • 2.Bf1#
      • 1...Sb6
        • 2.Sa3#
      • 1...Sf6
        • 2.Sa3#
      • 1...Sb8
        • 2.Sa3#
      • 1...Sf8
        • 2.Sa3#
      • 1...e3
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 1
  • Sets
    • K(a);OGATEB,P-FLIGHT,P_SPINS(e),XS(D)::QAR1(G),XP(b)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAB1(G),XP(b)
        • K(a);P-FLIGHT,XS(D)::QAR1(G),XP(b)
      • Refutation
        • K(a);P_SPINP(b),P_SPINS(d),S_FLIGHT
    • Try
      • Q(G);XP(b)
      • Threat
        • S(J)
      • Vars
        • S(d);N_GUARD::B(C)
      • Refutation
        • P(c);P_SPINP(c),XS(D)
  • Actual
    • S(D);
    • Vars
      • K(a);N_GUARD,P_SPINP(b),P_SPINS(e),S_FLIGHT::QAB1(G),XP(b)
      • K(a);OGATEB,S_FLIGHT,XP(E)::QAB1(G)
      • K(a);N_GUARD,P_SPINP(b),P_SPINS(d),S_FLIGHT::QAB(G)
      • S(d);N_GUARD,XQ(G)::B(C)
      • S(d);SBLOCK::S(J)
      • S(d);N_GUARD::B(C)
      • S(e);::S(D)
      • P(b);::S(J)
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