MESON Chess Problem Database

Problem Display
PID: 224289 (8/8/4q3/3R3N/5N2/4pp1Q/2b1nk2/7K w - - 0 1)

Fitzpatrick, Herbert F

Brownson's Chess Journal, 1887

8/8/4q3/3R3N/5N2/4pp1Q/2b1nk2/7K

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Sd3#
    • 1...Bb3
      • 2.Sd3#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Ba4
      • 2.Sd3#
  • Tries
    • 1.Qxf3+?
      • 1...Ke1
        • 2.Sg2#
        • 2.Qxe2#
      • 1...Kxf3!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Rf1#
        • 2.Qf1#
        • 2.Qh2#
      • 1...Qxh3+
        • 2.Sxh3#
      • 1...Sg3+
        • 2.Qxg3#
      • 1...Bxd1
        • 2.Sd3#
      • 1...Sxf4
        • 2.Qf1#
      • 1...Qg4
        • 2.Rf1#
        • 2.Qf1#
      • 1...Qg8
        • 2.Rf1#
        • 2.Qf1#
      • 1...Qg6
        • 2.Rf1#
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
  • Tries
    • Try
      • Q(B);CHECK,XP(e)
      • Refutation
        • K(c);P-FLIGHT,XQ(B)
  • Actual
    • R(D);
    • Threat
      • DUALS(3)
    • Vars
      • Q(f);CHECK,XQ(B)::S(C),XQ(f)
      • S(b);CHECK,N_GUARD::QAB1(B),XS(b)
      • B(a);N_GUARD,XR(D)::S(C)
      • S(b);XS(C)::QAR1(B)
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