MESON Chess Problem Database

Problem Display
PID: 219076 (3K4/3P4/2pQp3/2r1r3/8/3P4/2NkN3/2R1R3 w - - 0 1)

Mackenzie, Arthur Ford

Baltimore American and Commercial Advertiser, 1882

3K4/3P4/2pQp3/2r1r3/8/3P4/2NkN3/2R1R3

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qxc5?
      • threat
        • 2.Rcd1#
        • 2.Qc3#
      • 1...Kxd3
        • 2.Qd4#
      • 1...Rxe2
        • 2.Rcd1#
        • 2.Red1#
      • 1...Rxc5!
    • 1.Qxe5?
      • threat
        • 2.Red1#
        • 2.Qe3#
      • 1...Kxd3
        • 2.Qd4#
      • 1...Rxc2
        • 2.Rcd1#
        • 2.Red1#
      • 1...Rxe5!
  • Keys
    • 1.Qd4!
      • 1...Rxc2
        • 2.Rcd1#
      • 1...Rxe2
        • 2.Red1#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rc4
        • 2.dxc4#
      • 1...Ra5
        • 2.Qc3#
      • 1...Rb5
        • 2.Qc3#
      • 1...Rcd5
        • 2.Qc3#
      • 1...Re3
        • 2.Qxe3#
      • 1...Re4
        • 2.dxe4#
      • 1...Red5
        • 2.Qe3#
      • 1...Rf5
        • 2.Qe3#
      • 1...Rg5
        • 2.Qe3#
      • 1...Rh5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR1(F)
      • Refutation
        • R(c);XQ(F)
    • Try
      • Q(F);XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR1(F)
      • Refutation
        • R(b);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • R(b);SBLOCK,XS(C)::R1(A)
      • R(c);SBLOCK,XS(D)::R1(B)
      • R(b);N_GUARD::QAB1(F),XR(b)
      • R(b);OGATE::QAR(F)+P(E),XR(b)
      • R(b);N_GUARD::QAB1(F)
      • R(b);N_GUARD,P_PINP(G)::QAB1(F)
      • R(c);N_GUARD::QAB1(F),XR(c)
      • R(c);OGATE::QAR(F)+P(E),XR(c)
      • R(c);N_GUARD,P_PINP(G)::QAB1(F)
      • R(c);N_GUARD::QAB1(F)
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