MESON Chess Problem Database

Problem Display
PID: 107692 (8/2n4R/4k3/3qp3/2Q3K1/2N5/8/3R4 w - - 0 1)

Barry, John Finan

Quebec Chronicle, 1885

8/2n4R/4k3/3qp3/2Q3K1/2N5/8/3R4

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qxd5+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Sxd5!
    • 1.Qa6+?
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qd6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Sxa6!
    • 1.Qc6+?
      • 1...Qd6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Qxc6!
  • Keys
    • 1.Se4!
      • 1...Qxc4
        • 2.Rd6#
      • 1...Sb5
        • 2.Qxd5#
      • 1...Sa6
        • 2.Qxd5#
      • 1...Sa8
        • 2.Qxd5#
      • 1...Se8
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK,XQ(a)
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • S(d);XQ(C)
    • Try
      • Q(C);CHECK,N_PINQ(a)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR2(C),XQ(a)
      • Refutation
        • S(d);XQ(C)
    • Try
      • Q(C);CHECK,N_PINQ(a)
      • Refutation
        • Q(a);XQ(C)
  • Actual
    • S(B);
    • Vars
      • Q(a);N_SPINQ(a),OGATE,P_PINS(B),XQ(C)::R1(A)
      • S(d);N_GUARD::QAB1(C),XQ(a)
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