MESON Chess Problem Database

Problem Display
PID: 10397 (1Q2K3/8/b1k5/2P5/n1N1P3/2b5/2N5/2R5 w - - 0 1)

Mansfield, Comins

5th HM., Die Schwalbe, 1964

1Q2K3/8/b1k5/2P5/n1N1P3/2b5/2N5/2R5

#2

7 + 4

3174 The Two-move Chess Problem Tradition and Development 1966
4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Qc8#
    • 1...Sb2
      • 2.Qb6#
    • 1...Sxc5
      • 2.Qb6#
    • 1...Sb6
      • 2.Qxb6#
  • Tries
    • 1.Sb4+?
      • 1...Bxb4
        • 2.Se5#
      • 1...Kxc5!
    • 1.Sd4+?
      • 1...Bxd4
        • 2.Sa5#
      • 1...Kxc5!
    • 1.S4a3?
      • 1...Kxc5
        • 2.Qc7#
      • 1...Ba1
        • 2.Sb4#
      • 1...Be1
        • 2.Sd4#
      • 1...Bb2
        • 2.Sb4#
      • 1...Bd2
        • 2.Sd4#
      • 1...Bb4
        • 2.Sxb4#
        • 2.Sd4#
      • 1...Bd4
        • 2.Sb4#
        • 2.Sxd4#
      • 1...Ba5
        • 2.Sd4#
      • 1...Be5
        • 2.Sb4#
      • 1...Bf6
        • 2.Sb4#
      • 1...Bg7
        • 2.Sb4#
      • 1...Bh8
        • 2.Sb4#
      • 1...Bf1
        • 2.Qc8#
      • 1...Be2
        • 2.Qc8#
      • 1...Bd3
        • 2.Qc8#
      • 1...Bc4
        • 2.Qc8#
      • 1...Bb5
        • 2.Qc8#
      • 1...Bb7
        • 2.Qd6#
      • 1...Bc8
        • 2.Qxc8#
      • 1...Sb2
        • 2.Qb6#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sxc5!
    • 1.Sa5+?
      • 1...Bxa5
        • 2.Sd4#
      • 1...Kxc5!
    • 1.Se5+?
      • 1...Bxe5
        • 2.Sb4#
      • 1...Kxc5!
    • 1.Qc7+?
      • 1...Kb5
        • 2.S4a3#
        • 2.Sd6#
      • 1...Kxc7!
  • Keys
    • 1.S2a3!
      • 1...Kxc5
        • 2.Qd6#
      • 1...Bxc4
        • 2.Qc8#
      • 1...Sxc5
        • 2.Qb6#
      • 1...Ba1
        • 2.Sa5#
      • 1...Be1
        • 2.Se5#
      • 1...Bb2
        • 2.Sa5#
      • 1...Bd2
        • 2.Se5#
      • 1...Bb4
        • 2.Se5#
      • 1...Bd4
        • 2.Sa5#
      • 1...Ba5
        • 2.Sxa5#
        • 2.Se5#
      • 1...Be5
        • 2.Sa5#
        • 2.Sxe5#
      • 1...Bf6
        • 2.Sa5#
      • 1...Bg7
        • 2.Sa5#
      • 1...Bh8
        • 2.Sa5#
      • 1...Bb5
        • 2.Qc8#
      • 1...Bb7
        • 2.Qd6#
      • 1...Bc8
        • 2.Qxc8#
      • 1...Sb2
        • 2.Qb6#
      • 1...Sb6
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD,SBLOCK::QAR2(F)
    • S(b);N_GUARD::QAR1(F)
    • S(b);N_GUARD,XP(E)::QAR1(F)
    • S(b);N_GUARD::QAR1(F),XS(b)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • B(a);XS(B)::S(C)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
    • Try
      • S(B);CHECK
      • Vars
        • B(a);XS(B)::S(C)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
    • Try
      • S(C);
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAR2(F)
        • B(a);N_GUARD::S(B)
        • B(c);N_GUARD::QAR2(F)
        • B(c);SBLOCK::QAR1(F)
        • B(c);N_GUARD::QAR2(F),XB(c)
        • S(b);N_GUARD::QAR1(F)
        • S(b);N_GUARD::QAR1(F),XS(b)
      • Refutation
        • S(b);XP(E)
    • Try
      • S(C);CHECK
      • Vars
        • B(a);XS(C)::S(B)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
    • Try
      • S(C);CHECK
      • Vars
        • B(a);XS(C)::S(B)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(d);P-FLIGHT,XQ(F)
  • Actual
    • S(B);
    • Vars
      • K(d);P-FLIGHT,XP(E)::QAB1(F)
      • B(c);N_GUARD,XS(C)::QAR2(F)
      • S(b);N_GUARD,XP(E)::QAR1(F)
      • B(a);N_GUARD::S(C)
      • B(c);N_GUARD::QAR2(F)
      • B(c);SBLOCK::QAR1(F)
      • B(c);N_GUARD::QAR2(F),XB(c)
      • S(b);N_GUARD::QAR1(F)
      • S(b);N_GUARD::QAR1(F),XS(b)
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