MESON Chess Problem Database

Problem Display
PID: 181844 (1Q6/8/3p1N1K/4k3/3N4/8/3P4/8 w - - 0 1)

Vasques, Julio

Os Sports, 1905

1Q6/8/3p1N1K/4k3/3N4/8/3P4/8

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qxd6#
  • Tries
    • 1.Kg6?
      • 1...Kf4
        • 2.Qxd6#
      • 1...Kxd4!
    • 1.Qb3?
      • 1...Kxd4
        • 2.Qd5#
        • 2.Qc3#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kxf6
        • 2.Qe6#
      • 1...d5!
    • 1.Qe8+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kxf6
        • 2.Qe6#
      • 1...Kxd4!
    • 1.Qg8?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Qg5#
      • 1...Kxf6
        • 2.Qe6#
        • 2.Qg7#
      • 1...d5!
  • Keys
    • 1.Qc7!
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qxd6#
      • 1...Kxf6
        • 2.Qg7#

Anticipated by 30870(1875), 214456(1878), 214590(1878), 222466(1883), 181750(1905)

This anticipates 28736(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(E),XP(b)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XS(B)
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT,XS(C)::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT,XS(C)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAR1(E)
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • P(b);
  • Actual
    • Q(E);
    • Vars
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(B)::QAB1(E)
      • K(a);S_FLIGHT::QAB(E),XP(b)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(C)::QAB1(E)
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