MESON Chess Problem Database

Problem Display
PID: 18466 (Q3q1B1/2rN2B1/2npp1Rr/1P1k4/1Pn4p/2PP4/2b5/3R2bK w - - 0 1)

Mansfield, Comins

American Chess Bulletin, 1956

Q3q1B1/2rN2B1/2npp1Rr/1P1k4/1Pn4p/2PP4/2b5/3R2bK

#2

11 + 11

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa8
      • 2.Bxe6#
    • 1...Qb8
      • 2.Bxe6#
    • 1...Qc8
      • 2.Bxe6#
    • 1...Qd8
      • 2.Bxe6#
    • 1...Qf8
      • 2.Bxe6#
    • 1...Ra7
      • 2.Qxc6#
    • 1...Rxd7
      • 2.Qxc6#
    • 1...Sb2
      • 2.Rg5#
    • 1...Sd2
      • 2.Rg5#
    • 1...Sa3
      • 2.Rg5#
    • 1...Se3
      • 2.Sb6#
    • 1...Sa5
      • 2.Rg5#
    • 1...Se5
      • 2.Sf6#
    • 1...Sb6
      • 2.Rg5#
  • Tries
    • 1.Sb6+?
      • 1...Sxb6
        • 2.Rg5#
      • 1...Bxb6!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qxc4#
      • 1...Bxd3
        • 2.Qg2#
      • 1...Sxb4
        • 2.Rg5#
      • 1...Bb3
        • 2.Qg2#
      • 1...Sd4
        • 2.Sb6#
      • 1...Sa5
        • 2.Rg5#
      • 1...Se5
        • 2.Sf6#
      • 1...Sa7
        • 2.Rg5#
      • 1...Se7
        • 2.Bxe6#
      • 1...Sb8
        • 2.Rg5#
      • 1...Sd8
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 14
  • Sets
    • Q(k);N_GUARD,N_SPINS(f),XQ(J)::B(K),XP(h)
    • Q(k);N_GUARD::B(K),XP(h)
    • R(j);N_GUARD::QAB1(J),XS(f)
    • R(j);N_GUARD,XS(H)::QAB1(J),XS(f)
    • S(c);N_GUARD::R(G)
    • S(c);N_GUARD,S_CUTB(a)::S(H)
    • S(c);SBLOCK::S(H)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • S(c);XS(H)::R(G)
      • Refutation
        • B(a);XS(H)
  • Actual
    • Q(J);N_PINS(f),P_PINS(c)
    • Threat
      • QAB1(J),XS(c)
    • Vars
      • B(b);OGATE,P_SPINB(b),XP(D)::QAB(J)
      • S(f);N_GUARD,XP(E)::R(G)
      • B(b);N_SPINS(c),OGATE::QAB(J)
      • S(f);S_CUTB(a)::S(H)
      • S(f);N_GUARD::R(G)
      • S(f);SBLOCK::S(H)
      • S(f);S_CUTQ(k)::B(K),XP(h)
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