MESON Chess Problem Database

Problem Display
PID: 10740 (8/6pK/rRPPkPB1/8/3Q4/8/8/8 w - - 0 1)

Mansfield, Comins

Sunday Citizen, 1967

8/6pK/rRPPkPB1/8/3Q4/8/8/8

#2

7 + 3

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Tries
    • 1.Bf7+?
      • 1...Kf5
        • 2.Rb5#
      • 1...Kxf7!
    • 1.Rb5?
      • threat
        • 2.Qe5#
      • 1...gxf6
        • 2.Qd5#
      • 1...Rxc6!
    • 1.Qe4+?
      • 1...Kxf6
        • 2.Qf5#
        • 2.Qe7#
      • 1...Kxd6!
    • 1.Qd5+?
      • 1...Kxf6
        • 2.Qf5#
      • 1...Kxd5!
    • 1.d7?
      • threat
        • 2.d8S#
      • 1...Ra8
        • 2.c7#
      • 1...gxf6!
  • Keys
    • 1.c7!
      • threat
        • 2.c8Q#
        • 2.c8B#
      • 1...Kd7
        • 2.Qg4#
      • 1...Rxb6
        • 2.c8Q#
        • 2.c8B#
      • 1...gxf6
        • 2.c8Q#
        • 2.c8B#
      • 1...Ra7
        • 2.d7#
      • 1...Ra1
        • 2.d7#
        • 2.c8Q#
        • 2.c8B#
      • 1...Ra2
        • 2.d7#
        • 2.c8Q#
        • 2.c8B#
      • 1...Ra3
        • 2.d7#
        • 2.c8Q#
        • 2.c8B#
      • 1...Ra4
        • 2.d7#
        • 2.c8Q#
        • 2.c8B#
      • 1...Ra5
        • 2.d7#
        • 2.c8Q#
        • 2.c8B#
      • 1...Ra8
        • 2.d7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(b);S_FLIGHT::R(B)
      • Refutation
        • K(b);S_FLIGHT,XB(F)
    • Try
      • R(B);
      • Threat
        • QAR1(A)
      • Vars
        • P(c);SBLOCK,XP(E)::QAB1(A)
      • Refutation
        • R(a);XP(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT,XP(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(E)::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • P(D);
      • Threat
        • P=S
      • Vars
        • R(a);N_GUARD::R(B)+P(C)
      • Refutation
        • P(c);XP(E)
  • Actual
    • P(C);
    • Threat
      • P=Q
    • Vars
      • K(b);S_FLIGHT::QAB(A)
      • R(a);XR(B)::P=Q
      • P(c);XP(E)::P=Q
      • R(a);N_GUARD::R(B)+P(D)
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