MESON Chess Problem Database

Problem Display
PID: 196580 (8/8/2p1N1K1/3k4/2N5/2p5/2P5/1Q6 w - - 0 1)

Wadeson, RH

Western Daily Mercury, 1918

(First published on Fri Aug 16 1918)

8/8/2p1N1K1/3k4/2N5/2p5/2P5/1Q6

#2

5 + 3

5454 Near Snap 2019
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qb3#
    • 1...Ke4
      • 2.Qh1#
  • Tries
    • 1.Kf5?
      • 1...Kxc4
        • 2.Qb3#
      • 1...c5!
    • 1.Kf6?
      • 1...Kxc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qh1#
      • 1...c5!
    • 1.Qd1+?
      • 1...Ke4
        • 2.Qh1#
        • 2.Qd3#
      • 1...Kxe6
        • 2.Qd6#
      • 1...Kxc4!
    • 1.Qf1?
      • 1...Ke4
        • 2.Qg2#
        • 2.Qd3#
        • 2.Qh1#
        • 2.Qf5#
      • 1...Kxe6
        • 2.Qf7#
      • 1...c5!
  • Keys
    • 1.Qb7!
      • 1...Kxc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qxc6#
      • 1...Kxe6
        • 2.Qf7#

This anticipates 80435(1962), 28892(1979)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
    • K(b);S_FLIGHT::QAB(A)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
        • K(b);S_FLIGHT::QAB(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(D)::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(A);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(D)::QAB1(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);P_PINP(c)
    • Vars
      • K(b);N_SPINP(c),OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • K(b);S_FLIGHT::QAB(A),XP(c)
      • K(b);N_SPINP(c),OGATEB,S_FLIGHT,XS(D)::QAB1(A)
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