MESON Chess Problem Database

Problem Display
PID: 132984 (8/8/2N1Q3/3p1R2/8/3k4/p2N2R1/K7 w - - 0 1)

Sumner, Christopher Richard Benson

The Field, 1959

(First published on Thu Oct 22 1959)

8/8/2N1Q3/3p1R2/8/3k4/p2N2R1/K7

#2

6 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qb3#
  • Tries
    • 1.Qxd5+?
      • 1...Kc3
        • 2.Se4#
        • 2.Qb3#
        • 2.Qc4#
      • 1...Ke3
        • 2.Sf1#
        • 2.Sc4#
        • 2.Rf3#
        • 2.Qb3#
        • 2.Qf3#
        • 2.Qe4#
        • 2.Qd4#
      • 1...Kc2!
    • 1.Qe3+?
      • 1...Kxe3
        • 2.Rf3#
      • 1...Kc2!
    • 1.Qe4+?
      • 1...Kc3
        • 2.Rf3#
      • 1...dxe4!
    • 1.Qg6?
      • threat
        • 2.Rf3#
      • 1...Kc3
        • 2.Rf3#
      • 1...Ke3
        • 2.Rf3#
        • 2.Qg3#
      • 1...Kc2!
  • Keys
    • 1.Se4!
      • 1...Ke3
        • 2.Sc5#
      • 1...Kc4
        • 2.Qxd5#
      • 1...dxe4
        • 2.Qb3#
      • 1...d4
        • 2.Rf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::QAR2(F)
  • Tries
    • Try
      • Q(F);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT,XQ(F)::R1(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT::R(D)
      • Refutation
        • P(c);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAB(F)+R(D),DCHECK
      • Vars
        • K(b);P-FLIGHT::R(D)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(b);P-FLIGHT::QAR(F)+S(B)
      • K(b);P_SPINP(c),S_FLIGHT::QAB1(F),XP(c)
      • P(c);OGATE,SBLOCK,XS(B)::QAR2(F)
      • P(c);::R(D)
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