MESON Chess Problem Database

Problem Display
PID: 2508 (7Q/q7/2PPBRPN/4kN1R/4p1pB/1P2p1Pb/2P1p3/4K3 w - - 0 1)

Loyd, Sam

The Chess Monthly (Morphy/Fiske), 1857

7Q/q7/2PPBRPN/4kN1R/4p1pB/1P2p1Pb/2P1p3/4K3

#2

14 + 7

1679 American Chess Nuts 1868
5206 Sam Loyd and His Chess Problems 1913

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sf7#
    • 1...Qc5
      • 2.Sf7#
    • 1...Qb6
      • 2.Sf7#
    • 1...Qb8
      • 2.Sf7#
    • 1...Qa2
      • 2.Sf7#
    • 1...Qa3
      • 2.Sf7#
    • 1...Qa4
      • 2.Sf7#
    • 1...Qa6
      • 2.Sf7#
    • 1...Qf7
      • 2.Sxf7#
    • 1...Qa8
      • 2.Sf7#
    • 1...Bf1
      • 2.Sxg4#
    • 1...Bg2
      • 2.Sxg4#
  • Tries
    • 1.Sd4+?
      • 1...Kxd4
        • 2.Rf7#
      • 1...Kxd6!
    • 1.Se7+?
      • 1...Kd4
        • 2.Rf1#
        • 2.Rf2#
        • 2.Rf3#
        • 2.Rf4#
        • 2.Rff5#
        • 2.Rf7#
        • 2.Rf8#
      • 1...Kxd6!
  • Keys
    • 1.Qa8!
      • 1...Qa1+
        • 2.Qxa1#
      • 1...Qa5+
        • 2.Qxa5#
      • 1...Qxa8
        • 2.Sf7#
      • 1...Qd4
        • 2.Sf7#
      • 1...Qc5
        • 2.Sf7#
      • 1...Qb6
        • 2.Sf7#
      • 1...Qb8
        • 2.Sf7#
        • 2.Qa1#
      • 1...Qa2
        • 2.Sf7#
      • 1...Qa3
        • 2.Sf7#
      • 1...Qa4
        • 2.Sf7#
      • 1...Qa6
        • 2.Sf7#
      • 1...Qb7
        • 2.Qa1#
      • 1...Qc7
        • 2.Qa1#
      • 1...Qd7
        • 2.Qa1#
        • 2.Qa5#
      • 1...Qe7
        • 2.Qa1#
        • 2.Qa5#
      • 1...Qf7
        • 2.Sxf7#
        • 2.Qa1#
        • 2.Qa5#
      • 1...Qg7
        • 2.Qa1#
        • 2.Qa5#
      • 1...Qh7
        • 2.Qa1#
        • 2.Qa5#
      • 1...Bf1
        • 2.Sxg4#
      • 1...Bg2
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(g);N_GUARD::S(M)
    • Q(g);N_GUARD::S(M),XQ(g)
    • B(c);N_GUARD::S(M),XP(e)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(F)::QAB(N)+R(K)
      • Refutation
        • K(f);S_FLIGHT,XP(I)
    • Try
      • S(F);CHECK
      • Refutation
        • K(f);S_FLIGHT,XP(I)
  • Actual
    • Q(N);
    • Vars
      • Q(g);CHECK,OGATE::QAB(N),XQ(g)
      • Q(g);CHECK,OGATE::QAR(N),XQ(g)
      • Q(g);N_GUARD,XQ(N)::S(M)
      • Q(g);N_GUARD::S(M)
      • Q(g);OGATE::QAB(N)
      • B(c);N_GUARD::S(M),XP(e)
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