MESON Chess Problem Database

Problem Display
PID: 10502 (4R2b/4q2B/3pNp2/1Q2NPPp/2p1k2r/R3Pp2/1p2bKP1/8 w - - 0 1)

Mansfield, Comins

Comm., Die Schwalbe, 1965/I

4R2b/4q2B/3pNp2/1Q2NPPp/2p1k2r/R3Pp2/1p2bKP1/8

#2

11 + 11

23 Die Schwalbe 1969
4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.gxf3#
    • 1...Bd3
      • 2.gxf3#
    • 1...dxe5
      • 2.Qc6#
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Sd2#
      • 1...Bxc4
        • 2.gxf3#
      • 1...d5
        • 2.Sc5#
      • 1...b1S!
    • 1.Sc7?
      • threat
        • 2.Qd5#
      • 1...Qxc7
        • 2.Sd7#
      • 1...Qxh7
        • 2.Sf7#
      • 1...d5
        • 2.Qxd5#
      • 1...Qf7
        • 2.Sxf7#
      • 1...Qe6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qxc4#
      • 1...Qxh7
        • 2.Sg7#
      • 1...Bxd3
        • 2.gxf3#
      • 1...cxd3
        • 2.Ra4#
      • 1...fxg5
        • 2.Sxg5#
      • 1...Qa7
        • 2.Sc7#
      • 1...Qc7
        • 2.Sxc7#
      • 1...c3
        • 2.Ra4#
        • 2.Qc4#
      • 1...d5
        • 2.Sec5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::P(B),XP(c)
    • P(h);N_GUARD,SBLOCK,XS(F)::QAB(E)
  • Tries
    • Try
      • S(F);XP(d)
      • Threat
        • S(F)
      • Vars
        • B(b);N_GUARD,XS(F)::P(B),XP(c)
        • P(h);N_GUARD,SBLOCK::S(I)
      • Refutation
        • P(a);
    • Try
      • S(I);
      • Threat
        • QAB1(E)
      • Vars
        • Q(j);XS(I)::R(K)+S(F)
        • Q(j);XB(J)::R(K)+S(F)
        • P(h);::QAB1(E),XP(h)
        • Q(j);::R(K)+S(F),XQ(j)
      • Refutation
        • Q(j);
  • Actual
    • S(F);
    • Threat
      • QAR2(E),XP(d)
    • Vars
      • Q(j);XB(J)::R(K)+S(I)
      • B(b);N_GUARD,XS(F)::P(B),XP(c)
      • P(d);OGATEB,XS(F)::R(C)
      • P(i);XP(H)::S(I),XP(i)
      • Q(j);P_PINP(D)::R(K)+S(I)
      • Q(j);::R(K)+S(I),XQ(j)
      • P(h);N_GUARD,SBLOCK::S(I)
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