MESON Chess Problem Database

Problem Display
PID: 2491 (n3k2r/1Pb1p3/1p2Q3/1K1B4/8/8/8/8 w k - 0 1)

Loyd, Sam

Source?, 0000

n3k2r/1Pb1p3/1p2Q3/1K1B4/8/8/8/8

#2

4 + 6

1679 American Chess Nuts 1868
5206 Sam Loyd and His Chess Problems 1913
15 British Chess Magazine 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8
      • 2.Qc8#
    • 1...Kf8
      • 2.Qf7#
    • 1...Bh2
      • 2.Qc8#
    • 1...Bg3
      • 2.Qc8#
    • 1...Bf4
      • 2.Qc8#
    • 1...Be5
      • 2.Qc8#
    • 1...Bd6
      • 2.Qc8#
    • 1...Bb8
      • 2.Qc8#
  • Tries
    • 1.Bc6+?
      • 1...Kd8
        • 2.Qd7#
        • 2.Qc8#
      • 1...Kf8!
    • 1.bxa8Q+?
      • 1...Bb8
        • 2.Qc8#
        • 2.Qxb8#
      • 1...Bd8!
    • 1.bxa8R+?
      • 1...Bb8
        • 2.Rxb8#
        • 2.Qc8#
      • 1...Bd8!
    • 1.b8Q+?
      • 1...Bxb8
        • 2.Qc8#
      • 1...Bd8!
    • 1.b8R+?
      • 1...Bxb8
        • 2.Qc8#
      • 1...Bd8!
  • Keys
    • 1.b8S!
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qf7#
      • 1...Bxb8
        • 2.Qc8#
      • 1...Rh1
        • 2.Qg8#
      • 1...Rh2
        • 2.Qg8#
      • 1...Rh3
        • 2.Qg8#
      • 1...Rh4
        • 2.Qg8#
      • 1...Rh5
        • 2.Qg8#
      • 1...Rh6
        • 2.Qg8#
      • 1...Rh7
        • 2.Qg8#
      • 1...Rf8
        • 2.Qd7#
      • 1...Rg8
        • 2.Qxg8#
      • 1...Bh2
        • 2.Qc8#
      • 1...Bg3
        • 2.Qc8#
      • 1...Bf4
        • 2.Qc8#
      • 1...Be5
        • 2.Qc8#
      • 1...Bd6
        • 2.Qc8#
      • 1...Bd8
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINP(c),P-FLIGHT::QAR1(C)
    • B(b);N_GUARD::QAR2(C)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(e);N_SPINP(c),P-FLIGHT
    • Try
      • P(D);CHECK,XS(d)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • P(D);CHECK,XS(d)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • P(D);CHECK
      • Vars
        • B(b);N_GUARD,XQ(D)::QAR2(C)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • P(D);CHECK
      • Vars
        • B(b);N_GUARD,XR(D)::QAR2(C)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • P(D);
    • Vars
      • K(e);N_SPINP(c),P-FLIGHT::QAR1(C)
      • B(b);N_GUARD,XS(D)::QAR2(C)
      • R(f);N_GUARD::QAR2(C)
      • R(f);N_GUARD,P_PINB(B)::QAR2(C)
      • R(f);SBLOCK::QAB1(C)
      • R(f);N_GUARD::QAR2(C),XR(f)
      • B(b);N_GUARD::QAR2(C)
      • B(b);SBLOCK::QAB1(C)
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