MESON Chess Problem Database

Problem Display
PID: 306 (8/3p1p2/1Q1P1K2/3kp3/8/2p3N1/2P2pN1/3n1B2 w - - 0 1)

Warton, Joseph John

Warton, Thomas Joseph

The Observer, 1921

(First published on Sun Jul 10 1921)

8/3p1p2/1Q1P1K2/3kp3/8/2p3N1/2P2pN1/3n1B2

#2

7 + 7

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...e4
      • 2.Sf4#
  • Tries
    • 1.Kf5?
      • 1...Se3+
        • 2.Sxe3#
      • 1...Sb2
        • 2.Se3#
      • 1...e4
        • 2.Sf4#
      • 1...f6!
    • 1.Kxf7?
      • 1...Sb2
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...e4!
    • 1.Se4?
      • 1...Sb2
        • 2.Sxc3#
      • 1...Se3
        • 2.Sxc3#
      • 1...Kxe4!
    • 1.Qb5+?
      • 1...Kd4
        • 2.Qc4#
        • 2.Qxe5#
      • 1...Kxd6!
  • Keys
    • 1.Se2!
      • 1...Kc4
        • 2.Sef4#
      • 1...Ke4
        • 2.Qb7#
      • 1...Sb2
        • 2.Sxc3#
      • 1...Se3
        • 2.Sxc3#
      • 1...e4
        • 2.Sef4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(C)
    • S(a);N_GUARD::S(C),XS(a)
    • P(e);N_GUARD::S(C)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Vars
        • S(a);CHECK,N_GUARD::S(C),XS(a)
        • S(a);N_GUARD::S(C)
        • P(e);N_GUARD::S(C)
      • Refutation
        • P(g);
    • Try
      • K(G);P-FLIGHT,XP(g)
      • Vars
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
      • Refutation
        • P(e);
    • Try
      • S(D);
      • Vars
        • S(a);N_GUARD::S(D),XP(c)
      • Refutation
        • K(d);S_FLIGHT,XS(D)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(F)
  • Actual
    • S(D);
    • Vars
      • K(d);S_FLIGHT::B(A)+S(D)
      • K(d);S_FLIGHT::QAB(E)
      • S(a);N_GUARD::S(D),XP(c)
      • P(e);N_GUARD,SBLOCK::S(D)
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