MESON Chess Problem Database

Problem Display
PID: 42284 (8/2KN4/3p1p1r/1PpR4/Qpb1k1p1/2PR2P1/7N/3n4 w - - 0 1)

Mansfield, Comins

British Chess Magazine, 1968

8/2KN4/3p1p1r/1PpR4/Qpb1k1p1/2PR2P1/7N/3n4

#2

9 + 9

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh2
      • 2.Sxf6#
    • 1...Rh3
      • 2.Sxf6#
    • 1...Rh4
      • 2.Sxf6#
    • 1...Rh5
      • 2.Sxf6#
    • 1...Rh8
      • 2.Sxf6#
    • 1...bxc3
      • 2.Qxc4#
    • 1...b3
      • 2.Qxc4#
  • Tries
    • 1.Qxd1?
      • threat
        • 2.Qe2#
        • 2.Qxg4#
        • 2.Qe1#
        • 2.Qh1#
      • 1...Rxh2
        • 2.Sxf6#
        • 2.Qxg4#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Rh4
        • 2.Sxf6#
        • 2.Qe2#
        • 2.Qe1#
        • 2.Qh1#
      • 1...Rg6
        • 2.Qe2#
        • 2.Qe1#
        • 2.Qh1#
      • 1...f5
        • 2.Qe2#
        • 2.Qe1#
        • 2.Qh1#
      • 1...Bxd5!
    • 1.Qa8?
      • threat
        • 2.Qe8#
      • 1...Bxd3
        • 2.Re5#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Rh5
        • 2.Sxf6#
      • 1...Rh8
        • 2.Sxf6#
      • 1...f5
        • 2.R5d4#
      • 1...Rh7!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qg2#
      • 1...Rxh2
        • 2.Sxf6#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Bxd5
        • 2.Rf3#
      • 1...Sf2
        • 2.Qe2#
      • 1...Se3
        • 2.R3d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(i);N_GUARD,XS(A)::S(I),XP(h)
    • R(i);N_GUARD::S(I),XP(h)
    • P(b);OGATE,P_SPINB(c),XP(B)::QAR2(E),XB(c)
    • P(b);OGATE,P_SPINB(c)::QAR2(E),XB(c)
  • Tries
    • Try
      • Q(E);XS(a)
      • Threat
        • DUALS(4)
      • Vars
        • B(c);OGATE,XR(C)::QAB1(E),XB(c)
      • Refutation
        • B(c);XR(G)
    • Try
      • Q(E);
      • Threat
        • QAR(E)
      • Vars
        • B(c);SBLOCK,XR(C)::QAB(E)+R(G),DCHECK
        • B(c);OGATE,P_SPINB(c),XR(G)::QAB1(E),XB(c)
        • R(i);N_GUARD::S(I),XP(h)
        • P(h);SBLOCK::QAB(E)+R(G),DCHECK
      • Refutation
        • R(i);P_PINS(I)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • R(i);N_GUARD,XS(A)::S(I),XP(h)
      • B(c);OGATE,P_SPINB(c),XR(C)::QAB1(E),XB(c)
      • B(c);N_GUARD,SBLOCK,XR(G)::QAB(E)+R(C)
      • S(a);N_GUARD::QAR2(E)
      • S(a);SBLOCK::QAB(E)+R(C),DCHECK
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