MESON Chess Problem Database

Problem Display
PID: 81339 (7b/8/6q1/1B6/3p4/8/R1PkN3/1K1N1R2 w - - 0 1)

Allison, Christopher John

The Field, 1951

(First published on Sat Jun 2 1951)

7b/8/6q1/1B6/3p4/8/R1PkN3/1K1N1R2

#2

7 + 4

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2+
      • 2.Rxc2#
    • 1...Qd3
      • 2.cxd3#
    • 1...Qh5
      • 2.c3#
    • 1...Qe8
      • 2.c3#
    • 1...Qg1
      • 2.c3#
    • 1...Qg2
      • 2.c3#
    • 1...Qg3
      • 2.c3#
    • 1...Qg4
      • 2.c3#
    • 1...Qg5
      • 2.c3#
    • 1...Qb6
      • 2.c3#
    • 1...Qc6
      • 2.c3#
    • 1...Qd6
      • 2.c3#
    • 1...Qf6
      • 2.c3#
    • 1...Qh6
      • 2.c3#
    • 1...Qg7
      • 2.c3#
    • 1...d3
      • 2.c3#
  • Keys
    • 1.Sc1!
      • threat
        • 2.Sb3#
      • 1...Qxc2+
        • 2.Rxc2#
      • 1...Qd3
        • 2.cxd3#
      • 1...Qf7
        • 2.c4#
      • 1...Qg3
        • 2.c3#
        • 2.c4#
      • 1...Qe6
        • 2.c4#
      • 1...Qg8
        • 2.c4#
      • 1...d3
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(c);CHECK,OGATE,P_SPINQ(c),XP(E)::R1(D),XQ(c)
    • Q(c);::R(D)+P(E),XQ(c)
    • Q(c);N_PINP(E)::R(D)+P(E)
    • Q(c);N_PINP(E),P_PINB(G)::R(D)+P(E)
    • P(b);N_PINP(E)::R(D)+P(E)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XP(E)::R1(D),XQ(c)
      • Q(c);::R(D)+P(E),XQ(c)
      • Q(c);N_PINP(E)::R(D)+P(E)
      • P(b);N_PINP(E)::R(D)+P(E)
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