MESON Chess Problem Database

Problem Display
PID: 258312 (3N4/K7/8/pkpNP3/1pR1P1B1/1p6/1P6/8 w - - 0 1)

Schwann, Edward B

English Mechanic and World of Science, 1891

(First published on Fri Jul 17 1891)

3N4/K7/8/pkpNP3/1pR1P1B1/1p6/1P6/8

#2

8 + 5

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Sc3#
      • 2.Bd7#
  • Tries
    • 1.Se3?
      • threat
        • 2.Bd7#
      • 1...Ka4
        • 2.Bd7#
      • 1...a4!
    • 1.Sc7+?
      • 1...Ka4
        • 2.Bd7#
      • 1...Kxc4!
    • 1.Sb7?
      • 1...Ka4
        • 2.Sc3#
        • 2.Bd7#
      • 1...Kc6
        • 2.Rxc5#
      • 1...a4
        • 2.Rxc5#
      • 1...Kxc4!
    • 1.Be2?
      • threat
        • 2.Rxb4#
      • 1...Ka4
        • 2.Sc3#
      • 1...a4!
    • 1.Rxc5+?
      • 1...Ka4
        • 2.Sb6#
        • 2.Bd7#
      • 1...Kxc5!
  • Keys
    • 1.Se6!
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxc4
        • 2.Be2#
      • 1...Kc6
        • 2.Sd4#
      • 1...a4
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • B(D)
      • Vars
        • K(d);P_SPINP(b),S_FLIGHT::B(D)
      • Refutation
        • P(c);
    • Try
      • S(E);CHECK
      • Vars
        • K(d);N_GUARD,P_SPINP(b),S_FLIGHT::B(D)
      • Refutation
        • K(d);S_FLIGHT,XR(B)
    • Try
      • S(H);
      • Vars
        • K(d);N_GUARD,P_SPINP(e),S_FLIGHT::R1(B),XP(e)
        • P(c);SBLOCK::R1(B),XP(e)
      • Refutation
        • K(d);S_FLIGHT,XR(B)
    • Try
      • B(D);
      • Threat
        • B(D)+R(B),DCHECK,XP(b)
      • Vars
        • K(d);P_SPINP(b),S_FLIGHT::S(E)
      • Refutation
        • P(c);
    • Try
      • R(B);CHECK,XP(e)
      • Refutation
        • K(d);P-FLIGHT,XR(B)
  • Actual
    • S(H);
    • Vars
      • K(d);N_GUARD,P_SPINP(b),S_FLIGHT::S(E)
      • K(d);OGATEB,S_FLIGHT,XR(B)::B(D)
      • K(d);N_GUARD,P_SPINP(e),S_FLIGHT::S(H)
      • P(c);SBLOCK::R1(B),XP(e)
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