MESON Chess Problem Database

Problem Display
PID: 175648 (Q6b/3K4/3p2p1/4k3/6P1/5R2/4N3/1n6 w - - 0 1)

McAllister, George W

Philadelphia Times, 1900

Q6b/3K4/3p2p1/4k3/6P1/5R2/4N3/1n6

#2

5 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Re3#
    • 1...d5
      • 2.Qe8#
    • 1...g5
      • 2.Rf5#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qxh8#
      • 1...Kd4
        • 2.Qd5#
      • 1...Bf6
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bg7
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sd2
        • 2.Qd5#
        • 2.Qxh8#
      • 1...d5
        • 2.Qxd5#
        • 2.Qxh8#
      • 1...Sxc3!
    • 1.Qxh8+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke4!
  • Keys
    • 1.Kc6!
      • threat
        • 2.Qe8#
      • 1...Ke4
        • 2.Kxd6#
      • 1...Ke6
        • 2.Qe8#
      • 1...Bf6
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(e);SBLOCK::R(B)
    • P(c);SBLOCK::QAR(E)
    • P(d);N_GUARD::R1(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(3)
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
      • Refutation
        • S(a);XS(A)
    • Try
      • Q(E);CHECK,XB(e)
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • QAR(E)
    • Vars
      • K(b);P-FLIGHT::QAB(E)+K(D),XP(c)
      • K(b);P-FLIGHT::QAR2(E)
      • B(e);SBLOCK::R(B)
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