MESON Chess Problem Database

Problem Display
PID: 169941 (K6Q/8/2N5/3k4/4N3/5R2/6P1/8 w - - 0 1)

Robin, Albert

Bulletin de la FFE, 1945

K6Q/8/2N5/3k4/4N3/5R2/6P1/8

#2

6 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qd4#
      • 2.Qe5#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Qe5#
      • 1...Kxe4
        • 2.Qe5#
      • 1...Ke6!
    • 1.Qb2?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6!
    • 1.Qc3?
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qd3#
        • 2.Qc4#
      • 1...Ke6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Sc5#
        • 2.Sg5#
        • 2.Rf6#
        • 2.Qd6#
      • 1...Kxc6!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Sd2#
        • 2.Sd6#
        • 2.Rc3#
        • 2.Qc5#
      • 1...Kxc6!
    • 1.Qf6?
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qg7?
      • 1...Kxe4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc4!
    • 1.Qh5+?
      • 1...Kc4
        • 2.Sd2#
        • 2.Sd6#
        • 2.Rc3#
        • 2.Qc5#
      • 1...Kxe4
        • 2.Qe5#
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf7#
        • 2.Qf5#
      • 1...Kxc6!
    • 1.Qh6?
      • 1...Kxe4
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qh7?
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf5#
        • 2.Qf7#
      • 1...Kc4!
    • 1.Qc8?
      • 1...Kxe4
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qd8+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qd3#
        • 2.Qd4#
      • 1...Ke6
        • 2.Sc5#
        • 2.Sg5#
        • 2.Rf6#
        • 2.Qd6#
      • 1...Kxc6!
    • 1.Qf8?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe4
        • 2.Qf5#
      • 1...Ke6
        • 2.Qd6#
        • 2.Qf5#
        • 2.Qf7#
      • 1...Kxc6!
    • 1.Qg8+?
      • 1...Kxe4
        • 2.Qc4#
        • 2.Qe6#
      • 1...Kxc6!
  • Keys
    • 1.Qb8!
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qd6#

Anticipated by 76024(1923)

This anticipates 10890(1969)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(F)
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);S_FLIGHT,XS(C)::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(D)
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);S_FLIGHT,XS(C)::QAR1(F)
      • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(F)
      • K(a);S_FLIGHT::QAR1(F)
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