MESON Chess Problem Database

Problem Display
PID: 176179 (8/3p4/2pQ4/8/K1k5/8/N3P3/8 w - - 0 1)

Petkov, Petko Andonov

1st Comm., Schach-Echo, 1962

8/3p4/2pQ4/8/K1k5/8/N3P3/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qd3#
  • Tries
    • 1.Ka3?
      • 1...c5
        • 2.Qd3#
      • 1...Kb5!
    • 1.Ka5?
      • 1...c5
        • 2.Qd3#
      • 1...Kb3!
    • 1.Sc1?
      • 1...c5
        • 2.Qd3#
      • 1...Kc3!
    • 1.Sc3?
      • threat
        • 2.Qb4#
      • 1...c5
        • 2.Qd3#
      • 1...Kxc3!
    • 1.Sb4?
      • 1...c5
        • 2.Qd3#
      • 1...Kc3!
    • 1.Qe5?
      • 1...d5
        • 2.Qc3#
      • 1...c5
        • 2.Qe4#
      • 1...d6!
    • 1.Qxd7?
      • 1...c5
        • 2.Qd3#
      • 1...Kc5!
  • Keys
    • 1.e4!
      • 1...c5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB1(D)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • P(b);SBLOCK::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);
      • Threat
        • QAR1(D)
      • Vars
        • P(b);SBLOCK::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
    • Try
      • S(A);
      • Vars
        • P(b);SBLOCK::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • P(c);SBLOCK::QAR1(D)
        • P(b);SBLOCK::QAR2(D)
      • Refutation
        • P(c);
    • Try
      • Q(D);XP(c)
      • Vars
        • P(b);SBLOCK::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(B);
    • Vars
      • P(b);N_GUARD::QAB1(D)
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