MESON Chess Problem Database

Problem Display
PID: 32640 (3K4/8/1pNp2P1/1p1k4/1P1P2P1/3R2P1/2PP4/4Q3 w - - 0 1)

Portilla, Vincente Maria Norberto

Source?, 0000

3K4/8/1pNp2P1/1p1k4/1P1P2P1/3R2P1/2PP4/4Q3

#2

11 + 4

3498 Chess Problems by V. M. N. Portilla 1873

SOLUTION

  • SOUND
  • Tries
    • 1.Kc8?
      • 1...Kxc6
        • 2.d5#
      • 1...Kc4!
    • 1.Qh1+?
      • 1...Kc4
        • 2.Rc3#
      • 1...Ke6!
    • 1.Qe4+?
      • 1...Kc4
        • 2.Rc3#
        • 2.d5#
      • 1...Kxe4!
    • 1.Qe7?
      • 1...Kxc6
        • 2.d5#
      • 1...Kc4!
  • Keys
    • 1.Qa1!
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke4
        • 2.Qh1#
      • 1...Kxc6
        • 2.Qa8#
      • 1...Ke6
        • 2.d5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(K);P-FLIGHT
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(I)::P(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::R1(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(b);OGATE,S_FLIGHT,XS(I)::P(G)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB(A)
      • K(b);OGATEB,S_FLIGHT,XS(I)::QAB(A)
      • K(b);OGATE,S_FLIGHT::P(G)
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