MESON Chess Problem Database

Problem Display
PID: 11210 (3Q4/5N2/4N3/3p1p2/4k3/8/3P1K2/2B5 w - - 0 1)

Richardson, JE

Chess, 1937

3Q4/5N2/4N3/3p1p2/4k3/8/3P1K2/2B5

#2

6 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qxd4#
  • Tries
    • 1.Sc5+?
      • 1...Kf4
        • 2.Qh4#
        • 2.Qg5#
      • 1...Kd4!
    • 1.Sfg5+?
      • 1...Ke5
        • 2.d4#
      • 1...Kd3!
    • 1.Qh4+?
      • 1...f4
        • 2.Qh7#
      • 1...Kd3!
    • 1.Qb6?
      • threat
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qb1#
      • 1...d4
        • 2.Qxd4#
      • 1...f4
        • 2.Qb1#
      • 1...Kd3!
    • 1.Qf6?
      • threat
        • 2.Qd4#
      • 1...d4
        • 2.Qxd4#
      • 1...f4
        • 2.Sc5#
        • 2.Qg6#
      • 1...Kd3!
    • 1.Qh8?
      • threat
        • 2.Qd4#
      • 1...d4
        • 2.Qxd4#
      • 1...f4
        • 2.Qh7#
      • 1...Kd3!
  • Keys
    • 1.Sf4!
      • 1...Kd4
        • 2.Qxd5#
      • 1...Kxf4
        • 2.Qh4#
      • 1...d4
        • 2.d3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::QAR1(F),XP(b)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • S(E);CHECK
      • Vars
        • K(a);P-FLIGHT::P(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • P(c);OGATEB,P_SPINP(c)::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);::QAR1(F),XP(b)
        • P(c);::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • P(b);::QAR1(F),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • P(b);::QAR1(F),XP(b)
        • P(c);OGATEB::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAR1(F),XP(b)
      • K(a);OGATEB,P-FLIGHT,XS(D)::QAR2(F)
      • P(b);::P(B)
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