MESON Chess Problem Database

Problem Display
PID: 6661 (8/8/B7/7p/1K2p1q1/2B1R3/4PN1Q/5k2 w - - 0 1)

Mansfield, Comins

Morning Post, 1932

8/8/B7/7p/1K2p1q1/2B1R3/4PN1Q/5k2

#2

7 + 4

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Bxe2#
    • 1...Qf3
      • 2.exf3#
  • Tries
    • 1.Rg3?
      • threat
        • 2.Qg1#
        • 2.Qg2#
      • 1...Qxg3
        • 2.e3#
      • 1...Qf3
        • 2.Rg1#
        • 2.Qg1#
        • 2.exf3#
      • 1...Qh3
        • 2.Rg1#
        • 2.Qg1#
        • 2.e3#
      • 1...e3+!
  • Keys
    • 1.Rf3!
      • threat
        • 2.e3#
      • 1...exf3+
        • 2.e4#
      • 1...e3+
        • 2.Sxg4#
      • 1...Qxf3
        • 2.exf3#
      • 1...Qf5
        • 2.Qh1#
      • 1...Qe6
        • 2.Sxe4#
        • 2.Qh1#
      • 1...Qd7
        • 2.Sxe4#
        • 2.Qh1#
      • 1...Qc8
        • 2.Sxe4#
        • 2.Qh1#
      • 1...Qg5
        • 2.Sxe4#
      • 1...Qg6
        • 2.Sxe4#
      • 1...Qg8
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(c);OGATE,P_SPINQ(c),XP(A)::B(G),XQ(c)
    • Q(c);OGATE::B(G)+P(A),XQ(c)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_GUARD,XR(E)::B(G)+P(A)
      • Refutation
        • P(b);CHECK
  • Actual
    • R(E);
    • Threat
      • B(G)+P(A)
    • Vars
      • P(b);CHECK,OGATE,XR(E)::B(G)+P(A)
      • P(b);CHECK,N_GUARD::R(E)+S(B),XQ(c)
      • Q(c);OGATE,XR(E)::B(G)+P(A),XQ(c)
      • Q(c);N_GUARD::QAR2(C)
      • Q(c);N_GUARD::R(E)+S(B),XP(b)
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