MESON Chess Problem Database

Problem Display
PID: 55243 (1R6/1p1k1p2/1R3P2/3b4/3K4/6B1/8/3Q4 w - - 0 1)

Loyd, Sam

Source?, 0000

1R6/1p1k1p2/1R3P2/3b4/3K4/6B1/8/3Q4

#2

6 + 4

5206 Sam Loyd and His Chess Problems 1913

SOLUTION

  • SOUND
  • Sets
    • 1...Bh1
      • 2.Qg4#
    • 1...Ba2
      • 2.Qa4#
    • 1...Bg2
      • 2.Qg4#
    • 1...Bc4
      • 2.Kxc4#
    • 1...Be4
      • 2.Kxe4#
    • 1...Bc6
      • 2.Qg4#
    • 1...Be6
      • 2.Qa4#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Rd6#
        • 2.Qc7#
        • 2.Qc8#
      • 1...Bc6
        • 2.Qf5#
      • 1...Bc4!
    • 1.Qe2?
      • threat
        • 2.Qe7#
        • 2.Qe8#
      • 1...Be6
        • 2.Qb5#
      • 1...Be4!
    • 1.Qh5?
      • threat
        • 2.Qxd5#
      • 1...Bc6
        • 2.Qg4#
        • 2.Qxf7#
        • 2.Qh3#
        • 2.Qf5#
      • 1...Bb3
        • 2.Qb5#
      • 1...Bh1
        • 2.Qg4#
        • 2.Qxf7#
        • 2.Qh3#
        • 2.Qf5#
      • 1...Ba2
        • 2.Qb5#
      • 1...Bg2
        • 2.Qg4#
        • 2.Qxf7#
        • 2.Qf5#
      • 1...Bf3
        • 2.Qxf7#
        • 2.Qf5#
      • 1...Be4
        • 2.Qxf7#
      • 1...Be6
        • 2.Qb5#
      • 1...Bc4!
  • Keys
    • 1.Qd3!
      • 1...Bc6
        • 2.Qf5#
      • 1...Bb3
        • 2.Qb5#
      • 1...Bh1
        • 2.Qf5#
      • 1...Ba2
        • 2.Qb5#
      • 1...Bg2
        • 2.Qf5#
      • 1...Bf3
        • 2.Qf5#
      • 1...Bc4
        • 2.Kxc4#
      • 1...Be4
        • 2.Kxe4#
      • 1...Be6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(A)
    • B(a);::QAR(A)+K(C),XB(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);N_GUARD::QAB(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::QAB(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XB(a)
      • Vars
        • B(a);OGATE::QAB(A)
        • B(a);N_GUARD::QAR2(A),XP(d)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Vars
      • B(a);N_GUARD::QAB(A)
      • B(a);::QAR(A)+K(C),XB(a)
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