MESON Chess Problem Database

Problem Display
PID: 239257 (8/2p5/8/N1k5/4PP1p/3K3B/1Q6/8 w - - 0 1)

Makaronets, Leonid

Sachove umeni (Ceskoslovensky sach), 1972

8/2p5/8/N1k5/4PP1p/3K3B/1Q6/8

#2

6 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qe5#
    • 1...c6
      • 2.Sb7#
  • Tries
    • 1.Kc2?
      • 1...Kd6
        • 2.Qe5#
      • 1...c6!
    • 1.Kd2?
      • 1...Kd6
        • 2.Qe5#
      • 1...c6!
    • 1.Ke2?
      • 1...Kd6
        • 2.Qe5#
      • 1...c6!
    • 1.Ke3?
      • 1...Kd6
        • 2.Qe5#
      • 1...c6!
    • 1.Sc4?
      • 1...c6
        • 2.Qb6#
      • 1...Kc6!
    • 1.Bg4?
      • 1...Kd6
        • 2.Qe5#
      • 1...c6
        • 2.Sb7#
      • 1...h3!
    • 1.Bf5?
      • 1...Kd6
        • 2.Qe5#
      • 1...c6
        • 2.Sb7#
      • 1...h3!
    • 1.Bd7?
      • threat
        • 2.Sb7#
        • 2.Qd4#
      • 1...c6
        • 2.Sb7#
      • 1...Kd6!
    • 1.Bc8?
      • 1...Kd6
        • 2.Qe5#
      • 1...c6
        • 2.Sb7#
      • 1...h3!
    • 1.Qb1?
      • 1...c6
        • 2.Sb7#
      • 1...Kd6!
    • 1.Qb3?
      • 1...c6
        • 2.Sb7#
      • 1...Kd6!
    • 1.Qb5+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Kxb5!
    • 1.e5?
      • 1...Kd5
        • 2.Qd4#
      • 1...c6!
    • 1.f5?
      • 1...c6
        • 2.Sb7#
      • 1...Kd6!
  • Keys
    • 1.Qb8!
      • 1...Kd6
        • 2.Qf8#
      • 1...c6
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(A)
    • P(c);SBLOCK::S(F)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • S(F);
      • Vars
        • P(c);N_GUARD::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(c);SBLOCK::S(F)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(c);SBLOCK::S(F)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::S(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(c);SBLOCK::S(F)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK::S(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK::S(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • P(D);
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • P(E);
      • Vars
        • P(c);SBLOCK::S(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINP(c),S_FLIGHT::QAB(A)
      • P(c);SBLOCK::S(F)
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