MESON Chess Problem Database

Problem Display
PID: 108330 (8/1KN4Q/2pkp3/6P1/8/4PN2/8/8 w - - 0 1)

Coutinho, Jose Ernesto

Canadian Chess Chat, 1981

8/1KN4Q/2pkp3/6P1/8/4PN2/8/8

#2

6 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Se5?
      • 1...Kc5
        • 2.Qe7#
      • 1...c5
        • 2.Sc4#
      • 1...Kxe5!
    • 1.Qd3+?
      • 1...Kc5
        • 2.Sa6#
        • 2.Qd4#
      • 1...Ke7!
    • 1.Qd7+?
      • 1...Kc5
        • 2.Qd4#
      • 1...Kxd7!
  • Keys
    • 1.Sd2!
      • 1...Kc5
        • 2.Qe7#
      • 1...Ke5
        • 2.Sc4#
      • 1...c5
        • 2.Sc4#
      • 1...e5
        • 2.Se4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(b);S_FLIGHT::QAB(F)
        • P(a);SBLOCK::S(B)
      • Refutation
        • K(b);S_FLIGHT,XS(B)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • K(b);P-FLIGHT,XQ(F)
  • Actual
    • S(B);
    • Vars
      • K(b);S_FLIGHT::QAB(F)
      • K(b);S_FLIGHT::S(B)
      • P(a);SBLOCK::S(B)
      • P(c);SBLOCK::S(B)
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