MESON Chess Problem Database

Problem Display
PID: 18718 (Qn4K1/5R2/4k2b/2P3P1/3p1rNN/7B/8/7b w - - 0 1)

Mansfield, Comins

The Spectator, 1957

Qn4K1/5R2/4k2b/2P3P1/3p1rNN/7B/8/7b

#2

8 + 6

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qe4#
    • 1...Re4
      • 2.Qa2#
  • Tries
    • 1.Qxb8?
      • threat
        • 2.Qe5#
        • 2.Qd6#
      • 1...Rxg4
        • 2.Qd6#
      • 1...Rxf7
        • 2.Qd6#
      • 1...Re4
        • 2.Qd6#
        • 2.Qb3#
      • 1...Rf5
        • 2.Qd6#
      • 1...Bg7
        • 2.Qd6#
      • 1...Bf8
        • 2.Qe5#
      • 1...Kd5!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Sxf4#
      • 1...Rxg4
        • 2.Bxg4#
      • 1...Rxf7
        • 2.Sf6#
      • 1...Bxg5
        • 2.Sf8#
      • 1...Rf6
        • 2.Sxf6#
      • 1...Rf1
        • 2.Sf2#
      • 1...Rf2
        • 2.Sxf2#
      • 1...Rf3
        • 2.Qe4#
      • 1...Re4
        • 2.Qa2#
      • 1...Rf5
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD,S_CUTB(a)::QAR2(G)
    • R(c);S_CUTB(a)::QAB(G)
  • Tries
    • Try
      • Q(G);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);P_PINP(E),P_SPINR(c),XS(B)::QAR1(G)
        • R(c);XR(F)::QAR1(G)
        • R(c);::QAR1(G)
        • B(e);::QAR1(G)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • S(C),XR(c)
    • Vars
      • R(c);OGATE,P_SPINR(c),XS(B)::B(A),XR(c)
      • R(c);N_GUARD,XR(F)::B(A)+S(B)
      • B(e);N_GUARD,XP(E)::S(C)
      • R(c);N_GUARD::B(A)+S(B),XR(c)
      • R(c);N_GUARD::B(A)+S(B)
      • R(c);N_GUARD,S_CUTB(a)::QAR2(G)
      • R(c);S_CUTB(a)::QAB(G)
      • R(c);SBLOCK::R1(F)
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