MESON Chess Problem Database

Problem Display
PID: 218271 (5N2/4R2p/4Q2p/5pkp/R3pN2/2B4P/8/2K5 w - - 0 1)

Dale, CWM

English Mechanic and World of Science, 1874

(First published on Fri Jan 2 1874)

5N2/4R2p/4Q2p/5pkp/R3pN2/2B4P/8/2K5

#2

8 + 6

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Bf6#
      • 2.Qf6#
  • Tries
    • 1.Sg2?
      • threat
        • 2.Sxh7#
        • 2.Bf6#
        • 2.Rg7#
        • 2.Qg8#
        • 2.Qf6#
      • 1...f4
        • 2.Sxh7#
        • 2.Bf6#
        • 2.Ra5#
        • 2.Rg7#
        • 2.Qd5#
        • 2.Qe5#
        • 2.Qf6#
        • 2.h4#
      • 1...h4!
    • 1.Sxh7+?
      • 1...Kh4
        • 2.Be1#
      • 1...Kxf4!
    • 1.Rxe4?
      • threat
        • 2.Bf6#
        • 2.Qf6#
      • 1...fxe4
        • 2.Qf6#
      • 1...Kh4!
    • 1.Rg7+?
      • 1...Kh4
        • 2.Be1#
        • 2.Bf6#
        • 2.Qf6#
        • 2.Qe7#
      • 1...Kxf4!
    • 1.Qxf5+?
      • 1...Kh4
        • 2.Be1#
      • 1...Kxf5!
    • 1.Qg8+?
      • 1...Kh4
        • 2.Be1#
        • 2.Bf6#
      • 1...Kxf4!
    • 1.Qe5?
      • 1...h4
        • 2.S8e6#
        • 2.Sxh7#
        • 2.Rg7#
      • 1...e3
        • 2.S4e6#
        • 2.Qf6#
      • 1...Kh4!
    • 1.Qxh6+?
      • 1...Kh4
        • 2.Be1#
      • 1...Kxh6!
  • Keys
    • 1.Qb3!
      • 1...Kxf4
        • 2.Bd2#
      • 1...Kh4
        • 2.Bf6#
      • 1...h4
        • 2.S8e6#
      • 1...e3
        • 2.S4e6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(5)
      • Refutation
        • P(d);
    • Try
      • S(H);CHECK,XP(f)
      • Vars
        • K(c);S_FLIGHT::B(B)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT,XS(E)
    • Try
      • R(D);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XR(D)::QAB1(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(G);CHECK
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT,XS(E)
    • Try
      • Q(F);CHECK,XP(b)
      • Vars
        • K(c);S_FLIGHT::B(B)
      • Refutation
        • K(c);P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT,XS(E)
    • Try
      • Q(F);P_PINP(b)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • Q(F);CHECK,XP(e)
      • Vars
        • K(c);P_SPINP(d),S_FLIGHT::B(B)
      • Refutation
        • K(c);S_FLIGHT,XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(c);OGATEB,P_SPINP(a),S_FLIGHT,XS(E)::B(B)
      • K(c);S_FLIGHT::B(B)
      • P(d);SBLOCK::S(H)
      • P(a);::S(E)
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