MESON Chess Problem Database

Problem Display
PID: 245980 (8/8/1N5p/7K/8/2pk4/5Q2/2B5 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Shakhmatna misl, 1982

8/8/1N5p/7K/8/2pk4/5Q2/2B5

#2

4 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qe3#
  • Tries
    • 1.Kg4?
      • 1...Ke4
        • 2.Qe3#
      • 1...c2
        • 2.Qe3#
      • 1...h5+!
    • 1.Kg6?
      • 1...Ke4
        • 2.Qe3#
      • 1...c2
        • 2.Qe3#
      • 1...h5!
    • 1.Kxh6?
      • 1...c2
        • 2.Qe3#
      • 1...Ke4!
    • 1.Bf4?
      • 1...c2
        • 2.Qe3#
      • 1...Ke4!
    • 1.Bxh6?
      • 1...c2
        • 2.Qe3#
      • 1...Ke4!
    • 1.Qe1?
      • 1...Kd4
        • 2.Qe3#
      • 1...c2
        • 2.Qe3#
      • 1...Kc2!
    • 1.Qd2+?
      • 1...Ke4
        • 2.Qd5#
      • 1...cxd2!
    • 1.Qe2+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxe2!
    • 1.Qg2?
      • 1...Kd4
        • 2.Qd5#
      • 1...c2!
    • 1.Qf3+?
      • 1...Kd4
        • 2.Qd5#
        • 2.Qe3#
      • 1...Kc2!
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke2!
  • Keys
    • 1.Qa2!
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke4
        • 2.Qd5#
      • 1...c2
        • 2.Qc4#

Anticipated by 203575(1924)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);SBLOCK::QAR1(B)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • P(c);CHECK
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • K(C);P-FLIGHT,XP(c)
      • Vars
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);XP(c)
      • Vars
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);::QAB1(B)
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