MESON Chess Problem Database

Problem Display
PID: 55621 (r3n1NK/1R2PkPR/r7/3P4/1B5N/8/2Qb4/8 w - - 0 1)

Mansfield, Comins

Schach-Echo, 1976

r3n1NK/1R2PkPR/r7/3P4/1B5N/8/2Qb4/8

#2

10 + 5

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qg6#
    • 1...Ra2
      • 2.Qg6#
    • 1...Ra3
      • 2.Qg6#
    • 1...Ra4
      • 2.Qg6#
    • 1...Ra5
      • 2.Qg6#
    • 1...Rg6
      • 2.Qxg6#
    • 1...R6a7
      • 2.Qg6#
    • 1...Rd8
      • 2.exd8S#
    • 1...Sd6
      • 2.Qg6#
    • 1...Sf6
      • 2.Qg6#
  • Tries
    • 1.Qf5+?
      • 1...Sf6
        • 2.Qg6#
      • 1...Rf6!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qg6#
      • 1...Sd6+
        • 2.g8S#
      • 1...Sxf6+
        • 2.g8Q#
      • 1...Sc7+
        • 2.g8S#
      • 1...Sxg7+
        • 2.e8S#
      • 1...Kxf6
        • 2.Qf5#
      • 1...Rxf6
        • 2.g8Q#
        • 2.g8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::QAB1(A)
    • R(b);N_GUARD::QAB1(A),XR(b)
    • R(d);OGATE::PXR(d)=S
    • S(e);P_PINS(I),S_CUTR(b)::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);P_PINS(I),P_SPINS(e),S_CUTR(b)::QAB1(A)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • S(I);
    • Threat
      • QAB1(A)
    • Vars
      • S(e);CHECK::P=S
      • S(e);CHECK,SBLOCK,XS(I)::P=Q
      • S(e);CHECK,OGATE,P_SPINS(e),XP(G)::P=S
      • K(c);OGATEB,P-FLIGHT,XS(I)::QAR1(A)
      • R(b);SBLOCK,XS(I)::P=Q
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