MESON Chess Problem Database

Problem Display
PID: 70790 (7n/6R1/5k1P/8/3KQ3/3n4/8/8 w - - 0 1)

Mees, Wouter Jacob Gregorius

Probleemblad, 1996

7n/6R1/5k1P/8/3KQ3/3n4/8/8

#2

4 + 3

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qe5#
    • 1...Se1
      • 2.Qe5#
    • 1...Sb2
      • 2.Qe5#
    • 1...Sf2
      • 2.Qe5#
    • 1...Sb4
      • 2.Qe5#
    • 1...Sf4
      • 2.Qe5#
    • 1...Sc5
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sg6
      • 2.Qxg6#
    • 1...Sf7
      • 2.Rg6#
  • Tries
    • 1.Kxd3?
      • 1...Sf7
        • 2.Rg6#
      • 1...Sg6!
    • 1.Kd5?
      • threat
        • 2.Qe6#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sc5
        • 2.Qf3#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Se5
        • 2.Qf4#
        • 2.Qxe5#
      • 1...Sb4+!
    • 1.Qe8?
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sc1
        • 2.Qe5#
      • 1...Se1
        • 2.Qe5#
      • 1...Sb2
        • 2.Qe5#
      • 1...Sf2
        • 2.Qe5#
      • 1...Sb4
        • 2.Qe5#
      • 1...Sf4
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Kf5!
    • 1.h7?
      • 1...Se5
        • 2.Qxe5#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sc1
        • 2.Qe5#
      • 1...Se1
        • 2.Qe5#
      • 1...Sb2
        • 2.Qe5#
      • 1...Sf2
        • 2.Qe5#
      • 1...Sb4
        • 2.Qe5#
      • 1...Sf4
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#
      • 1...Sf7
        • 2.Rg6#
      • 1...Kxg7!
  • Keys
    • 1.Qd5!
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sc1
        • 2.Qe5#
      • 1...Se1
        • 2.Qe5#
      • 1...Sb2
        • 2.Qe5#
      • 1...Sf2
        • 2.Qe5#
      • 1...Sb4
        • 2.Qe5#
      • 1...Sf4
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#
      • 1...Sg6
        • 2.Rf7#

Anticipated by 22523(1933), 28095(1933)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • S(c);N_GUARD::QAR1(B),XS(c)
    • S(c);N_GUARD,SBLOCK::R1(D)
  • Tries
    • Try
      • K(A);P-FLIGHT,XS(a)
      • Vars
        • S(c);N_GUARD,SBLOCK::R1(D)
      • Refutation
        • S(c);
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAR1(B)
      • Vars
        • S(a);CHECK,N_GUARD::QAR2(B),XS(a)
        • S(c);N_GUARD::QAR1(B),XS(c)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(B);
      • Vars
        • S(c);N_GUARD::QAR1(B),XS(c)
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(C);
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(c);N_GUARD::QAR1(B),XS(c)
        • S(a);N_GUARD::QAB1(B)
        • S(c);N_GUARD,SBLOCK::R1(D)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
  • Actual
    • Q(B);
    • Vars
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(c);N_GUARD::QAR1(B),XS(c)
      • S(a);N_GUARD::QAB1(B)
      • S(c);N_GUARD,SBLOCK::R1(D)
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